Pub Date : 2024-11-17DOI: 10.1016/j.est.2024.114546
Xiangru Zhu , Pengjie Zhu , Yongfeng Li , Yanzhen Liu
NiCo2O4 is a promising material for pseudocapacitance because of its exceptional reversible ability and high theoretical specific capacitance. However, its effectiveness in supercapacitors is restrained by a restricted number of active sites and low intrinsic electronic conductivity. To address these challenges, a novel composite electrode, OV-NiCo2O4@CGN@NF, has been developed by the introduction of oxygen vacancies (OV)-abundant NiCo2O4 nanowires assembly coupled with CVD graphene network (CGN) on nickel foam (NF) to form a heterojunction structure. Incorporating oxygen vacancies and CGN enhances electrical conductivity, active sites and contact area, as well as promotes fast faradic redox reactions. The OV-NiCo2O4@CGN@NF electrode exhibits exceptional capacitive properties and impressive cyclic durability due to the strong binding between OV-NiCo2O4@CGN and NF. At a current density of 1 A g−1, the electrode delivers a high specific capacitance of 775.4C g−1 and a good capacity retention rate (101 % of its original specific capacity is left at 10 A g−1). Moreover, when used as the cathode in an all-solid-state asymmetric supercapacitor, together with activated carbon (AC) loaded on NF as the anode, the OV-NiCo2O4@CGN//AC all-solid-state asymmetric supercapacitor device achieves a high energy density of 53.1 Wh kg−1 at 800.2 W kg−1. This research contributes valuable insights for enhancing electrode materials for energy storage devices in the future.
{"title":"Nickel‑cobalt oxide nanowires with oxygen vacancies supported on CVD graphene networks for all-solid-state asymmetric supercapacitors","authors":"Xiangru Zhu , Pengjie Zhu , Yongfeng Li , Yanzhen Liu","doi":"10.1016/j.est.2024.114546","DOIUrl":"10.1016/j.est.2024.114546","url":null,"abstract":"<div><div>NiCo<sub>2</sub>O<sub>4</sub> is a promising material for pseudocapacitance because of its exceptional reversible ability and high theoretical specific capacitance. However, its effectiveness in supercapacitors is restrained by a restricted number of active sites and low intrinsic electronic conductivity. To address these challenges, a novel composite electrode, OV-NiCo<sub>2</sub>O<sub>4</sub>@CGN@NF, has been developed by the introduction of oxygen vacancies (OV)-abundant NiCo<sub>2</sub>O<sub>4</sub> nanowires assembly coupled with CVD graphene network (CGN) on nickel foam (NF) to form a heterojunction structure. Incorporating oxygen vacancies and CGN enhances electrical conductivity, active sites and contact area, as well as promotes fast faradic redox reactions. The OV-NiCo<sub>2</sub>O<sub>4</sub>@CGN@NF electrode exhibits exceptional capacitive properties and impressive cyclic durability due to the strong binding between OV-NiCo<sub>2</sub>O<sub>4</sub>@CGN and NF. At a current density of 1 A g<sup>−1</sup>, the electrode delivers a high specific capacitance of 775.4C g<sup>−1</sup> and a good capacity retention rate (101 % of its original specific capacity is left at 10 A g<sup>−1</sup>). Moreover, when used as the cathode in an all-solid-state asymmetric supercapacitor, together with activated carbon (AC) loaded on NF as the anode, the OV-NiCo<sub>2</sub>O<sub>4</sub>@CGN//AC all-solid-state asymmetric supercapacitor device achieves a high energy density of 53.1 Wh kg<sup>−1</sup> at 800.2 W kg<sup>−1</sup>. This research contributes valuable insights for enhancing electrode materials for energy storage devices in the future.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"104 ","pages":"Article 114546"},"PeriodicalIF":8.9,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-17DOI: 10.1016/j.est.2024.114663
Nguyen Quoc Minh, Nguyen Duy Linh, Nguyen Trong Khiem
The integration of renewable energy sources (RES) and battery energy storage systems in microgrid offers significant advantages but also presents challenges, such as the variable nature of RES and high battery costs. This paper introduces an innovative battery degradation model using the rain-flow counting algorithm to address both complete and incomplete cycles. We also propose a degradation cost model based on battery capacity loss and engineering economics principles. Additionally, we present a new metric, the probability of reserve adequacy (PRA), which indicates the likelihood of maintaining sufficient spinning reserves to meet local demand. The PRA is converted into deterministic constraints using properties of the normal distribution. To minimize operating costs while ensuring a specified PRA, the microgrid scheduling problem is formulated and solved using mixed-integer linear programming (MILP). The numerical simulation results indicate that the proposed model outperforms previous linear battery degradation models, achieving a 33.33 % reduction in cycle aging, a 24.11 % decrease in aging costs, and a 92 % reduction in computational load and processing time.
在微电网中集成可再生能源（RES）和电池储能系统具有显著优势，但同时也面临着挑战，例如可再生能源的可变性和高昂的电池成本。本文采用雨流计数算法引入了一种创新的电池衰减模型，以解决完全和不完全循环问题。我们还根据电池容量损失和工程经济学原理提出了退化成本模型。此外，我们还提出了一个新指标--储备充足概率 (PRA)，它表示维持足够旋转储备以满足本地需求的可能性。利用正态分布的特性，PRA 被转换为确定性约束。为了在确保特定 PRA 的同时最大限度地降低运营成本，微电网调度问题采用混合整数线性规划（MILP）的方法进行制定和求解。数值仿真结果表明，所提出的模型优于之前的线性电池退化模型，其循环老化率降低了 33.33%，老化成本降低了 24.11%，计算负荷和处理时间减少了 92%。
{"title":"A mixed-integer linear programming model for microgrid optimal scheduling considering BESS degradation and RES uncertainty","authors":"Nguyen Quoc Minh, Nguyen Duy Linh, Nguyen Trong Khiem","doi":"10.1016/j.est.2024.114663","DOIUrl":"10.1016/j.est.2024.114663","url":null,"abstract":"<div><div>The integration of renewable energy sources (RES) and battery energy storage systems in microgrid offers significant advantages but also presents challenges, such as the variable nature of RES and high battery costs. This paper introduces an innovative battery degradation model using the rain-flow counting algorithm to address both complete and incomplete cycles. We also propose a degradation cost model based on battery capacity loss and engineering economics principles. Additionally, we present a new metric, the probability of reserve adequacy (PRA), which indicates the likelihood of maintaining sufficient spinning reserves to meet local demand. The PRA is converted into deterministic constraints using properties of the normal distribution. To minimize operating costs while ensuring a specified PRA, the microgrid scheduling problem is formulated and solved using mixed-integer linear programming (MILP). The numerical simulation results indicate that the proposed model outperforms previous linear battery degradation models, achieving a 33.33 % reduction in cycle aging, a 24.11 % decrease in aging costs, and a 92 % reduction in computational load and processing time.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"104 ","pages":"Article 114663"},"PeriodicalIF":8.9,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-17DOI: 10.1016/j.est.2024.114661
Siyue Hui , Huanzhi Zhang , Guangpeng Xu , Junhao Zhang , Fen Xu , Lixian Sun , Xiangcheng Lin , Lei Ma , Hongliang Peng , Bin Li , Erhu Yan , Hans Jürgen Seifert
Although phase change materials (PCMs) have been widely utilized in thermal management of batteries, they still confront the challenges of high cost and low thermal conductivity. In this study, low-cost composite PCMs with high energy-storage capacity, thermal conductivity and outstanding thermal management performance were proposed by utilizing the synergetic porous structure of expanded graphite (EG) and boron carbon nitrogen (BCN) nanospheres through bridge-grafting method to encapsulate paraffin wax (PW), which effectively enhanced the anti-leakage and comprehensive performance. The incorporation of BCN nanospheres endowed the composite PCMs with extremely improved thermal conductivity of 1.611 W/(m·K), which was 421 % higher than that of pure PW. And the highly improved melting and crystal latent heat of the composite PCMs reached 184.37 J/g and 185.39 J/g, respectively, which also exhibited excellently thermal-cycling stability. The photo-thermal conversion efficiency of the composite PCMs was enhanced to 92.6 %. When applied to battery thermal management, the maximum temperature of battery wrapped with the composite PCMs was 11.9 °C lower than that of the batteries without PCMs, which confirmed an outstanding battery thermal management effect of the composite PCMs.
{"title":"Bridge-grafted EG/BCN encapsulated PW with effectively improved thermal conductivity and battery thermal management performance","authors":"Siyue Hui , Huanzhi Zhang , Guangpeng Xu , Junhao Zhang , Fen Xu , Lixian Sun , Xiangcheng Lin , Lei Ma , Hongliang Peng , Bin Li , Erhu Yan , Hans Jürgen Seifert","doi":"10.1016/j.est.2024.114661","DOIUrl":"10.1016/j.est.2024.114661","url":null,"abstract":"<div><div>Although phase change materials (PCMs) have been widely utilized in thermal management of batteries, they still confront the challenges of high cost and low thermal conductivity. In this study, low-cost composite PCMs with high energy-storage capacity, thermal conductivity and outstanding thermal management performance were proposed by utilizing the synergetic porous structure of expanded graphite (EG) and boron carbon nitrogen (BCN) nanospheres through bridge-grafting method to encapsulate paraffin wax (PW), which effectively enhanced the anti-leakage and comprehensive performance. The incorporation of BCN nanospheres endowed the composite PCMs with extremely improved thermal conductivity of 1.611 W/(m·K), which was 421 % higher than that of pure PW. And the highly improved melting and crystal latent heat of the composite PCMs reached 184.37 J/g and 185.39 J/g, respectively, which also exhibited excellently thermal-cycling stability. The photo-thermal conversion efficiency of the composite PCMs was enhanced to 92.6 %. When applied to battery thermal management, the maximum temperature of battery wrapped with the composite PCMs was 11.9 °C lower than that of the batteries without PCMs, which confirmed an outstanding battery thermal management effect of the composite PCMs.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"104 ","pages":"Article 114661"},"PeriodicalIF":8.9,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-17DOI: 10.1016/j.est.2024.114558
Wookjin Jeong , Sang-Ok Kim , Hyojun Lim , Kwanil Lee
To ensure the safety assessment and reliable lifespan prediction of energy storage systems, an effective battery temperature management system is essential. Traditional point sensors with limited measurement ranges are inadequate for comprehensive diagnostics. This paper presents the Brillouin optical correlation domain analysis system as an innovative solution for real-time temperature distribution monitoring during battery operation. Our proposed distributed fiber optic sensor leverages advanced optical techniques to achieve spatial resolution of 1.4 cm and measurement uncertainty of 0.38 °C. For precise temperature distribution measurement on the surface of polymer-based lithium-ion batteries, a single strand of optical fiber was arranged in a serpentine pattern. We compared the temperature variations on the battery surface during different C-rates of charging and discharging processes using a traditional thermistor and our fiber optic sensor. The results confirm that the fiber optic sensor effectively captures sudden temperature changes due to its rapid response time. Furthermore, we demonstrated comprehensive temperature distribution monitoring during a 1C charge and discharge process, showcasing the capability of system in tracking thermal anomalies and accurately assessing the state of battery. This advanced monitoring approach significantly enhances battery health diagnostics and ensures better management of energy storage systems.
为确保对储能系统进行安全评估和可靠的寿命预测，有效的电池温度管理系统至关重要。传统的点传感器测量范围有限，不足以进行全面诊断。本文提出了布里渊光学相关域分析系统，作为电池运行期间实时温度分布监测的创新解决方案。我们提出的分布式光纤传感器利用先进的光学技术实现了 1.4 厘米的空间分辨率和 0.38 °C的测量不确定性。为了精确测量聚合物锂离子电池表面的温度分布，我们将单股光纤排列成蛇形。我们使用传统热敏电阻和光纤传感器比较了电池表面在不同充电和放电 C 速率过程中的温度变化。结果证实，由于光纤传感器的快速响应时间，它能有效捕捉温度的突然变化。此外，我们还演示了在 1C 充放电过程中对温度分布的全面监测，展示了系统跟踪热异常和准确评估电池状态的能力。这种先进的监测方法极大地增强了电池健康诊断能力，确保更好地管理储能系统。
{"title":"High-resolution thermal monitoring of lithium-ion batteries using Brillouin scattering based fiber optic sensor with flexible spatial arrangement of sensing points","authors":"Wookjin Jeong , Sang-Ok Kim , Hyojun Lim , Kwanil Lee","doi":"10.1016/j.est.2024.114558","DOIUrl":"10.1016/j.est.2024.114558","url":null,"abstract":"<div><div>To ensure the safety assessment and reliable lifespan prediction of energy storage systems, an effective battery temperature management system is essential. Traditional point sensors with limited measurement ranges are inadequate for comprehensive diagnostics. This paper presents the Brillouin optical correlation domain analysis system as an innovative solution for real-time temperature distribution monitoring during battery operation. Our proposed distributed fiber optic sensor leverages advanced optical techniques to achieve spatial resolution of 1.4 cm and measurement uncertainty of 0.38 °C. For precise temperature distribution measurement on the surface of polymer-based lithium-ion batteries, a single strand of optical fiber was arranged in a serpentine pattern. We compared the temperature variations on the battery surface during different C-rates of charging and discharging processes using a traditional thermistor and our fiber optic sensor. The results confirm that the fiber optic sensor effectively captures sudden temperature changes due to its rapid response time. Furthermore, we demonstrated comprehensive temperature distribution monitoring during a 1C charge and discharge process, showcasing the capability of system in tracking thermal anomalies and accurately assessing the state of battery. This advanced monitoring approach significantly enhances battery health diagnostics and ensures better management of energy storage systems.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"104 ","pages":"Article 114558"},"PeriodicalIF":8.9,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-16DOI: 10.1016/j.est.2024.114555
Shunli Wang , Quan Dang , Zhengqing Gao , Bowen Li , Carlos Fernandez , Frede Blaabjerg
In the context of the thriving development of new energy vehicles, lithium-ion batteries, as a crucial component of the power storage system, will increasingly contribute to the strategic advancement of the industry, while this paper addresses three key issues in the estimation of lithium-ion battery state of charge (SOC) and state of power (SOP). Firstly, an online modified square root - untraced Kalman filtering (SR-UKF) algorithm is proposed to analyze the impact of temperature-induced capacity fluctuations, achieving highly accurate and adaptive SOC tracking. Secondly, an online multi-limit factor fusion analysis SOP estimation method is designed to mitigate computational complexity and enhance algorithm feasibility by addressing parameter fitting issues during offline identification. Thirdly, a real-time tracking data-based full-parameter online identification method is developed to enhance the accuracy of parameter identification and effectively describe internal and external factors. Experimental results demonstrate the algorithm's high accuracy, with a voltage simulation error below 0.04 V. Compared to traditional methods, the SR-UKF algorithm exhibits lower SOC simulation error below 2.36 %, offering a novel approach for SOC estimation under ambient temperature influences. Moreover, the proposed algorithm effectively estimates SOP, with a peak power estimation error of down to 66 W. In conclusion. This paper presents a novel SOC and SOP evaluation strategy, achieving a more reliable and accurate estimate under varying operating conditions.
{"title":"An innovative square root - untraced Kalman filtering strategy with full-parameter online identification for state of power evaluation of lithium-ion batteries","authors":"Shunli Wang , Quan Dang , Zhengqing Gao , Bowen Li , Carlos Fernandez , Frede Blaabjerg","doi":"10.1016/j.est.2024.114555","DOIUrl":"10.1016/j.est.2024.114555","url":null,"abstract":"<div><div>In the context of the thriving development of new energy vehicles, lithium-ion batteries, as a crucial component of the power storage system, will increasingly contribute to the strategic advancement of the industry, while this paper addresses three key issues in the estimation of lithium-ion battery state of charge (SOC) and state of power (SOP). Firstly, an online modified square root - untraced Kalman filtering (SR-UKF) algorithm is proposed to analyze the impact of temperature-induced capacity fluctuations, achieving highly accurate and adaptive SOC tracking. Secondly, an online multi-limit factor fusion analysis SOP estimation method is designed to mitigate computational complexity and enhance algorithm feasibility by addressing parameter fitting issues during offline identification. Thirdly, a real-time tracking data-based full-parameter online identification method is developed to enhance the accuracy of parameter identification and effectively describe internal and external factors. Experimental results demonstrate the algorithm's high accuracy, with a voltage simulation error below 0.04 V. Compared to traditional methods, the SR-UKF algorithm exhibits lower SOC simulation error below 2.36 %, offering a novel approach for SOC estimation under ambient temperature influences. Moreover, the proposed algorithm effectively estimates SOP, with a peak power estimation error of down to 66 W. In conclusion. This paper presents a novel SOC and SOP evaluation strategy, achieving a more reliable and accurate estimate under varying operating conditions.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"104 ","pages":"Article 114555"},"PeriodicalIF":8.9,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to solve the problems of low ionic conductivity, low lithium-ion transference number and weak mechanical strength of PEO solid polymer electrolytes (SPEs), this paper proposes to prepare composite cross-linked network polymer electrolytes (PEO-AAEM) through UV crosslinked polymerization of allyl acetoacetate (AAEM) and N-N-methylene diacrylamide (MBA) within the PEO SPEs. The amide group within the cross-linked network facilitates the dissociation of Li+, while the carbonyl group serves as a conduit for Li+ transport. The PEO-AAEM SPEs exhibit the ionic conductivity of 5.4×10−4 S cm−1, with a lithium-ion transference number of 0.54 at 60 °C. The assembled Li//Li battery with proper AAEM content can be stably cycled for 2000 h at 0.2 mA cm−2 current, and LiFePO4//Li battery maintains a reversible capacity of 100 mA h g−1 after 500 cycles at 0.2C. This work offers a viable pathway for developing SPEs with improved electrochemical performance for all solid-state lithium metal batteries (ASSLMBs).
为了解决聚醚砜固体聚合物电解质（SPE）离子电导率低、锂离子传输数低、机械强度弱等问题，本文提出通过紫外交联聚合聚醚砜固体聚合物电解质中的乙酰乙酸烯丙酯（AAEM）和N-N-亚甲基二丙烯酰胺（MBA），制备复合交联网络聚合物电解质（PEO-AAEM）。交联网络中的酰胺基促进了 Li+ 的解离，而羰基则成为 Li+ 的传输通道。PEO-AAEM SPE 的离子电导率为 5.4×10-4 S cm-1，在 60 °C 时的锂离子转移数为 0.54。在 0.2 mA cm-2 电流条件下，适当添加 AAEM 的组装锂/锂电池可稳定循环使用 2000 小时，而 LiFePO4/Li 电池在 0.2C 条件下循环使用 500 次后仍能保持 100 mA h g-1 的可逆容量。这项工作为开发电化学性能更佳的固态锂金属电池（ASSLMB）固相萃取剂提供了一条可行的途径。
{"title":"PEO-based electrolyte filled with UV-cured 3D cross-linked polymer network for lithium metal batteries","authors":"Youlan Zou, Yanhong He, Huiyao Li, Shiyan Deng, Wenhao Tang, Shuang Deng","doi":"10.1016/j.est.2024.114619","DOIUrl":"10.1016/j.est.2024.114619","url":null,"abstract":"<div><div>In order to solve the problems of low ionic conductivity, low lithium-ion transference number and weak mechanical strength of PEO solid polymer electrolytes (SPEs), this paper proposes to prepare composite cross-linked network polymer electrolytes (PEO-AAEM) through UV crosslinked polymerization of allyl acetoacetate (AAEM) and N-<em>N</em>-methylene diacrylamide (MBA) within the PEO SPEs. The amide group within the cross-linked network facilitates the dissociation of Li<sup>+</sup>, while the carbonyl group serves as a conduit for Li<sup>+</sup> transport. The PEO-AAEM SPEs exhibit the ionic conductivity of 5.4×10<sup>−4</sup> S cm<sup>−1</sup>, with a lithium-ion transference number of 0.54 at 60 °C. The assembled Li//Li battery with proper AAEM content can be stably cycled for 2000 h at 0.2 mA cm<sup>−2</sup> current, and LiFePO<sub>4</sub>//Li battery maintains a reversible capacity of 100 mA h g<sup>−1</sup> after 500 cycles at 0.2C. This work offers a viable pathway for developing SPEs with improved electrochemical performance for all solid-state lithium metal batteries (ASSLMBs).</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"104 ","pages":"Article 114619"},"PeriodicalIF":8.9,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-16DOI: 10.1016/j.est.2024.114543
Luthfan Adhy Lesmana , Muhammad Aziz
Metal hydride (MH) as a material for storing hydrogen has a substantial limitation in its wide use in the mobility sector, which is its low gravimetric hydrogen storage density. A novel canister design utilizing the optimized gyroid structure for MH-based hydrogen storage is proposed to enhance reactor strength and capacity, increasing its utilization outside stationary applications. The canister employs a multi-structure metamaterial to achieve enhanced heat transfer between the heat transfer fluid (HTF) and MH bed chambers. A nonsymmetrical triply periodic minimal surface gyroid chamber is set bigger than the other chamber by altering the surface numerical function. The larger chamber is assigned for the MH bed, while the smaller chamber is assigned for HTF during hydrogen charging and discharging. To induce more heat transfer towards the middle part of the MH bed, another metamaterial structure is embedded inside the MH bed chamber as an insert. The cell size parameter of the metamaterial insert influences the charging rate but at the cost of MH bed volume. This study employs a numerical model to assess hydrogen absorption and canister mechanical strengths. The numerical model for absorption accuracy is confirmed by comparing its results with data from prior experiments. Furthermore, a fluid pressure drop experiment is employed further to provide clarity on the approach of parameter arrangement to reach the optimum canister design. For the proposed scenario, it is found that a ratio of MH to HTF chambers of 5:1 with 40 mm insert cell size can absorb 80 % of hydrogen capacity under 2000 s by using charging pressure as low as 0.8 MPa. The structure also has a compression capacity of 5000 N, making it a prime approach to store hydrogen in a frame, replacing part to increase further the MH hydrogen storage system's overall gravimetric density.
{"title":"Enhanced metal hydride canister employing multi-structure metamaterial for efficient hydrogen storage","authors":"Luthfan Adhy Lesmana , Muhammad Aziz","doi":"10.1016/j.est.2024.114543","DOIUrl":"10.1016/j.est.2024.114543","url":null,"abstract":"<div><div>Metal hydride (MH) as a material for storing hydrogen has a substantial limitation in its wide use in the mobility sector, which is its low gravimetric hydrogen storage density. A novel canister design utilizing the optimized gyroid structure for MH-based hydrogen storage is proposed to enhance reactor strength and capacity, increasing its utilization outside stationary applications. The canister employs a multi-structure metamaterial to achieve enhanced heat transfer between the heat transfer fluid (HTF) and MH bed chambers. A nonsymmetrical triply periodic minimal surface gyroid chamber is set bigger than the other chamber by altering the surface numerical function. The larger chamber is assigned for the MH bed, while the smaller chamber is assigned for HTF during hydrogen charging and discharging. To induce more heat transfer towards the middle part of the MH bed, another metamaterial structure is embedded inside the MH bed chamber as an insert. The cell size parameter of the metamaterial insert influences the charging rate but at the cost of MH bed volume. This study employs a numerical model to assess hydrogen absorption and canister mechanical strengths. The numerical model for absorption accuracy is confirmed by comparing its results with data from prior experiments. Furthermore, a fluid pressure drop experiment is employed further to provide clarity on the approach of parameter arrangement to reach the optimum canister design. For the proposed scenario, it is found that a ratio of MH to HTF chambers of 5:1 with 40 mm insert cell size can absorb 80 % of hydrogen capacity under 2000 s by using charging pressure as low as 0.8 MPa. The structure also has a compression capacity of 5000 N, making it a prime approach to store hydrogen in a frame, replacing part to increase further the MH hydrogen storage system's overall gravimetric density.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"104 ","pages":"Article 114543"},"PeriodicalIF":8.9,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-16DOI: 10.1016/j.est.2024.114598
Ahmad A. Tareemi
As freshwater resources become increasingly scarce, the world faces a pressing challenge that calls for the advancement of effective water collection and purification methods. Herein, three scenarios involving the utilization of different materials for energy storage (1) reduced Graphene Oxide (rGO)-coated chips of copper; (2) rGO-coated copper chips (CCs) and paraffin wax (PCM); and (3) rGO-coated CCs, PCM, and copper chips were assessed and compared concerning system temperatures and hourly freshwater output. The theoretical model was in good agreement with the experimental results, and both revealed that MHSSC-3 had the highest daily productivity. Also, it was found that modifying MHSSC-3 with the copper absorber, had the highest daily freshwater yield of 7.724 kg/m2 among all other absorber materials. Furthermore, adding reflective mirrors to MHSSC-3 with the copper absorber increased daily productivity to 15.09 kg/m2, emphasizing their role in boosting solar gain and HSS output. Finally, utilizing stearic acid as a PCM could boost the daylight yield of drinkable water of MHSSC-3 with the copper absorber and reflective external mirrors to 16.72 kg/m2, however, paraffin wax would have been of highest daily yield if the unit had operated 24 h due its higher latent heat of fusion and heat storage capabilities.
{"title":"Augmentation of hemispherical distillers' performance via active and passive mods with different thermal energy storage: A numerical approach","authors":"Ahmad A. Tareemi","doi":"10.1016/j.est.2024.114598","DOIUrl":"10.1016/j.est.2024.114598","url":null,"abstract":"<div><div>As freshwater resources become increasingly scarce, the world faces a pressing challenge that calls for the advancement of effective water collection and purification methods. Herein, three scenarios involving the utilization of different materials for energy storage (1) reduced Graphene Oxide (rGO)-coated chips of copper; (2) rGO-coated copper chips (CCs) and paraffin wax (PCM); and (3) rGO-coated CCs, PCM, and copper chips were assessed and compared concerning system temperatures and hourly freshwater output. The theoretical model was in good agreement with the experimental results, and both revealed that MHSSC-3 had the highest daily productivity. Also, it was found that modifying MHSSC-3 with the copper absorber, had the highest daily freshwater yield of 7.724 kg/m<sup>2</sup> among all other absorber materials. Furthermore, adding reflective mirrors to MHSSC-3 with the copper absorber increased daily productivity to 15.09 kg/m<sup>2</sup>, emphasizing their role in boosting solar gain and HSS output. Finally, utilizing stearic acid as a PCM could boost the daylight yield of drinkable water of MHSSC-3 with the copper absorber and reflective external mirrors to 16.72 kg/m<sup>2</sup>, however, paraffin wax would have been of highest daily yield if the unit had operated 24 h due its higher latent heat of fusion and heat storage capabilities.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"104 ","pages":"Article 114598"},"PeriodicalIF":8.9,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-15DOI: 10.1016/j.est.2024.114540
Sitong Li , Zhuqing Li , Yu Chen , Hua Tian , Gequn Shu
Thermochemical energy storage (TCES) based on salt hydrate stands out as an important method for long-term energy storage. However, the low energy storage density (ESD) at low temperature and poor cycle stability of the materials limit the practical application. In this work, new composites for thermochemical heat storage at low temperature (about 100 °C) are synthesized, consisting of SrBr2 and SrCl2 with various mass ratios and expanded graphite (EG). The material properties are characterized and measured using scanning electron microscope (SEM), X-ray diffraction (XRD), thermal constant analyzer and simultaneous thermal analyzer (STA). The results demonstrate that the composites display excellent thermal conductivity, ESD and cycling performance. The composites exhibit an improvement in thermal conductivity by almost eightfold when compared with pure SrBr2. In comparison with SrCl2, the composites demonstrate a reduction in hydration time by approximately 3/5. The ESD of the composites at 100 °C surpasses 800 kJ kg−1, and the ESD of SrBr5Cl5@EG reaches 918.66 kJ kg−1, representing an 18.23 % enhancement compared with pure SrBr2. Furthermore, it is revealed that reducing the adsorption temperature, raising the heat source temperature and evaporation temperature are conducive to enhancing the heat storage performance of the composite. The cycling test results indicate that the SrBr5Cl5@EG composite retains 94.44 % of the initial ESD after 14 cycles, affirming its good stability. This work provides a new avenue for the development of advanced thermal energy storage materials and demonstrates great potential for long-term thermochemical energy storage applications at low temperature.
{"title":"A SrBr2/SrCl2-expanded graphite composite material for low temperature thermochemical energy storage","authors":"Sitong Li , Zhuqing Li , Yu Chen , Hua Tian , Gequn Shu","doi":"10.1016/j.est.2024.114540","DOIUrl":"10.1016/j.est.2024.114540","url":null,"abstract":"<div><div>Thermochemical energy storage (TCES) based on salt hydrate stands out as an important method for long-term energy storage. However, the low energy storage density (ESD) at low temperature and poor cycle stability of the materials limit the practical application. In this work, new composites for thermochemical heat storage at low temperature (about 100 °C) are synthesized, consisting of SrBr<sub>2</sub> and SrCl<sub>2</sub> with various mass ratios and expanded graphite (EG). The material properties are characterized and measured using scanning electron microscope (SEM), X-ray diffraction (XRD), thermal constant analyzer and simultaneous thermal analyzer (STA). The results demonstrate that the composites display excellent thermal conductivity, ESD and cycling performance. The composites exhibit an improvement in thermal conductivity by almost eightfold when compared with pure SrBr<sub>2</sub>. In comparison with SrCl<sub>2</sub>, the composites demonstrate a reduction in hydration time by approximately 3/5. The ESD of the composites at 100 °C surpasses 800 kJ kg<sup>−1</sup>, and the ESD of SrBr5Cl5@EG reaches 918.66 kJ kg<sup>−1</sup>, representing an 18.23 % enhancement compared with pure SrBr<sub>2</sub>. Furthermore, it is revealed that reducing the adsorption temperature, raising the heat source temperature and evaporation temperature are conducive to enhancing the heat storage performance of the composite. The cycling test results indicate that the SrBr5Cl5@EG composite retains 94.44 % of the initial ESD after 14 cycles, affirming its good stability. This work provides a new avenue for the development of advanced thermal energy storage materials and demonstrates great potential for long-term thermochemical energy storage applications at low temperature.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"104 ","pages":"Article 114540"},"PeriodicalIF":8.9,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-15DOI: 10.1016/j.est.2024.114326
Yi Wang , Guoliang Qin , Cheng Jia , Qin Cui , Yong Zhang
System performance metrics such as compression power, expansion power, and system efficiency are key indicators for assessing the scale of advanced adiabatic compressed air energy storage (AA-CAES). Analytical solutions offer a method to evaluate system performance. However, existing solutions often assume identical compression and expansion stages, equal compression and expansion ratios, and the use of only dry air. This study proposes a steady-state analytical solution consisting of seven equations and fourteen independent parameters without relying on these assumptions. The solution is applied to both ideal and practical conditions, taking material temperature limits into account. The findings indicate that under ideal conditions, a single-stage process achieves the highest system efficiency, whereas a multistage process reduces efficiency. Additionally, compression power is affected by , and expansion power is affected by both and . The higher value of , the higher value of the expansion power. The highest system efficiency of 68.15 % occurs when equals to 245 °C for a three-stage process. Compared with ideal conditions, the performance differs when is higher than the upper-temperature limit of the thermal medium under practical conditions. This study broadens the application of analytical solutions to processes with varying stages, compression and expansion ratios, and the use of both dry and humid air. The solution offers fast calculation speed and high accuracy, making it a valuable tool for engineers in the design and optimization of AA-CAES.
{"title":"A novel analytical solution for the system performance evaluation of advanced adiabatic compressed air energy storage suitable for variable process configuration and parameter","authors":"Yi Wang , Guoliang Qin , Cheng Jia , Qin Cui , Yong Zhang","doi":"10.1016/j.est.2024.114326","DOIUrl":"10.1016/j.est.2024.114326","url":null,"abstract":"<div><div>System performance metrics such as compression power, expansion power, and system efficiency are key indicators for assessing the scale of advanced adiabatic compressed air energy storage (AA-CAES). Analytical solutions offer a method to evaluate system performance. However, existing solutions often assume identical compression and expansion stages, equal compression and expansion ratios, and the use of only dry air. This study proposes a steady-state analytical solution consisting of seven equations and fourteen independent parameters without relying on these assumptions. The solution is applied to both ideal and practical conditions, taking material temperature limits into account. The findings indicate that under ideal conditions, a single-stage process achieves the highest system efficiency, whereas a multistage process reduces efficiency. Additionally, compression power is affected by <span><math><msub><mi>T</mi><mrow><mn>1</mn><mi>c</mi><mo>,</mo><mi>out</mi></mrow></msub></math></span>, and expansion power is affected by both <span><math><msub><mi>T</mi><mrow><mn>1</mn><mi>c</mi><mo>,</mo><mi>out</mi></mrow></msub></math></span> and <span><math><msub><mi>T</mi><mrow><mn>1</mn><mi>ex</mi><mo>,</mo><mi>out</mi></mrow></msub></math></span>. The higher value of <span><math><msub><mi>T</mi><mrow><mn>1</mn><mi>c</mi><mo>,</mo><mi>out</mi></mrow></msub></math></span>, the higher value of the expansion power. The highest system efficiency of 68.15 % occurs when <span><math><msub><mi>T</mi><mrow><mn>1</mn><mi>c</mi><mo>,</mo><mi>out</mi></mrow></msub></math></span> equals to 245 °C for a three-stage process. Compared with ideal conditions, the performance differs when <span><math><msub><mi>T</mi><mrow><mn>1</mn><mi>c</mi><mo>,</mo><mi>out</mi></mrow></msub></math></span> is higher than the upper-temperature limit of the thermal medium under practical conditions. This study broadens the application of analytical solutions to processes with varying stages, compression and expansion ratios, and the use of both dry and humid air. The solution offers fast calculation speed and high accuracy, making it a valuable tool for engineers in the design and optimization of AA-CAES.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"104 ","pages":"Article 114326"},"PeriodicalIF":8.9,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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