In order to improve the accuracy of battery pack inconsistency fault detection, an optimal deep belief network (DBN) single battery inconsistency fault detection model based on Grey Wolf Algorithm (GWA) was proposed. The performance of the DBN model is affected by the weights and bias parameters, and the gray wolf algorithm has a good ability to seek optimization, so the gray wolf algorithm is used to optimize the connection weights of the DBN network. Therefore, the accuracy rate of battery inconsistency diagnosis is improved. The battery voltage characteristic data is used as the input signal of the DBN model. The health and faults of the single cells are used as the output signals of the DBN model. The battery inconsistency fault detection model of GWA-DBN is established. Through the comparison and simulation with other algorithms, it is proved that the designed model has higher diagnostic accuracy, better fitting effect and good application prospect.
{"title":"Simple and effective fault diagnosis method of power lithium-ion battery based on GWA-DBN","authors":"Bin Pan, Wen Gao, Yuhang Peng, Zhilin Hu, Lujun Wang, Jiuchun Jiang","doi":"10.1115/1.4055801","DOIUrl":"https://doi.org/10.1115/1.4055801","url":null,"abstract":"\u0000 In order to improve the accuracy of battery pack inconsistency fault detection, an optimal deep belief network (DBN) single battery inconsistency fault detection model based on Grey Wolf Algorithm (GWA) was proposed. The performance of the DBN model is affected by the weights and bias parameters, and the gray wolf algorithm has a good ability to seek optimization, so the gray wolf algorithm is used to optimize the connection weights of the DBN network. Therefore, the accuracy rate of battery inconsistency diagnosis is improved. The battery voltage characteristic data is used as the input signal of the DBN model. The health and faults of the single cells are used as the output signals of the DBN model. The battery inconsistency fault detection model of GWA-DBN is established. Through the comparison and simulation with other algorithms, it is proved that the designed model has higher diagnostic accuracy, better fitting effect and good application prospect.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44946295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A novel after-burner used for the heat-up and normal operating conditions of metal-supported planar solid oxide fuel cell (SOFC) system, is designed and experimentally studied in this paper. The burner construction and the calculation of maximum burner power are showed in detail. Meanwhile, its static characteristics are researched through the influence of excess air ratio (ER), air velocity, inlet air temperature and fuel utilization rate (Uf); its transient characteristics are researched through the processes of burner start-up, burner operating state switch and stack start-up. Results suggest that the best ER value gets larger with the increased burner power. The air velocity is better controlled within 3 m·s-1 to prevent the influence of lifted flame. High inlet air temperature can extend lean combustion range and reduce incomplete combustion products, but large ER mutation should still be avoided. In case of anode off gas combusting with cathode off gas, there are nearly zero emissions. Meanwhile, the flue gas temperature decreases to about 760 °C because of enlarged heat loss, but it is minimally influenced by Uf. Under static condition, the optimal point with both controlled temperature and lowest emissions can be obtained in wide range, and the after-burner can well adapt to various operating states of the stack. Under transient condition, the after-burner has good response performance with much shorter time in burner start-up and burner operating state switch than conventional porous media ones. It can start up the stack in 1715 seconds.
{"title":"The characteristics of a novel after-burner used for metal-supported planar SOFC system","authors":"Siyuan Li, Zhe Zhang, Guo-xiang Li, Shuzhan Bai","doi":"10.1115/1.4055773","DOIUrl":"https://doi.org/10.1115/1.4055773","url":null,"abstract":"\u0000 A novel after-burner used for the heat-up and normal operating conditions of metal-supported planar solid oxide fuel cell (SOFC) system, is designed and experimentally studied in this paper. The burner construction and the calculation of maximum burner power are showed in detail. Meanwhile, its static characteristics are researched through the influence of excess air ratio (ER), air velocity, inlet air temperature and fuel utilization rate (Uf); its transient characteristics are researched through the processes of burner start-up, burner operating state switch and stack start-up. Results suggest that the best ER value gets larger with the increased burner power. The air velocity is better controlled within 3 m·s-1 to prevent the influence of lifted flame. High inlet air temperature can extend lean combustion range and reduce incomplete combustion products, but large ER mutation should still be avoided. In case of anode off gas combusting with cathode off gas, there are nearly zero emissions. Meanwhile, the flue gas temperature decreases to about 760 °C because of enlarged heat loss, but it is minimally influenced by Uf. Under static condition, the optimal point with both controlled temperature and lowest emissions can be obtained in wide range, and the after-burner can well adapt to various operating states of the stack. Under transient condition, the after-burner has good response performance with much shorter time in burner start-up and burner operating state switch than conventional porous media ones. It can start up the stack in 1715 seconds.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42773766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Duan, Zhenwei Wang, Jian Lin, Lijun Lv, Xingbo Han, W. Liu, Jun Li
In this study, La0.75Ce0.25Ni5-xMnx (x = 0, 0.1, 0.2, 0.3) alloys were prepared by vacuum arc melting. The effect of the addition of Mn on the alloy microstructure and hydrogen absorption/desorption properties were explored by characterizing X-ray diffraction (XRD), scanning electron microscopy (SEM), laser particle size test, hydrogen absorption kinetic test, and P-C-T test. The XRD results show that the series of alloys are single-phase alloys composed of the LaNi5 phase, and the cell volume of the alloy gradually increases as the amount of Mn replacing Ni increases. The P-C-T curve of the alloy shows that the alloy has obvious hydrogen absorption/desorption plateau regions, which gradually decrease with increasing Mn content, while the hydrogen storage capacity remains unchanged. The hydrogen absorption kinetic curve of the alloy was tested, and it was found that the hydrogen absorption rate of the alloy increased with the increase of Mn content. These studies show that doping the Mn element in the La0.75Ce0.25Ni5-xMnx (x = 0, 0.1, 0.2, 0.3) alloys may regulate plateau pressure without affecting the hydrogen storage capacity or kinetics properties, providing a reference for the application of this type of alloy in hydrogen pressurization, purification, etc.
{"title":"Effect of Mn substitution on the structure and hydrogen storage properties of La0.75Ce0.25Ni5-xMnx alloy","authors":"J. Duan, Zhenwei Wang, Jian Lin, Lijun Lv, Xingbo Han, W. Liu, Jun Li","doi":"10.1115/1.4055694","DOIUrl":"https://doi.org/10.1115/1.4055694","url":null,"abstract":"\u0000 In this study, La0.75Ce0.25Ni5-xMnx (x = 0, 0.1, 0.2, 0.3) alloys were prepared by vacuum arc melting. The effect of the addition of Mn on the alloy microstructure and hydrogen absorption/desorption properties were explored by characterizing X-ray diffraction (XRD), scanning electron microscopy (SEM), laser particle size test, hydrogen absorption kinetic test, and P-C-T test. The XRD results show that the series of alloys are single-phase alloys composed of the LaNi5 phase, and the cell volume of the alloy gradually increases as the amount of Mn replacing Ni increases. The P-C-T curve of the alloy shows that the alloy has obvious hydrogen absorption/desorption plateau regions, which gradually decrease with increasing Mn content, while the hydrogen storage capacity remains unchanged. The hydrogen absorption kinetic curve of the alloy was tested, and it was found that the hydrogen absorption rate of the alloy increased with the increase of Mn content. These studies show that doping the Mn element in the La0.75Ce0.25Ni5-xMnx (x = 0, 0.1, 0.2, 0.3) alloys may regulate plateau pressure without affecting the hydrogen storage capacity or kinetics properties, providing a reference for the application of this type of alloy in hydrogen pressurization, purification, etc.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46536446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A novel cost effective Chitosan-PVA-Red Mud (RM) hybrid membranes are developed and their morphological and physiochemical properties are studied. The addition of RM enhanced IEC and bound water content in a composite membranes. The hydroxyl groups are consumed due to the interaction with silica oxides and depleted the crystalline phase of the composites. The tensile strength and modulus of the composite membranes were reduced. The addition of RM improves the thermal stability of the composite membrane and shifts the degradation process to a higher temperature. The RM nanoparticles depleted the hooping sites for methanol transport in the composite membrane and the permeability value reported in the modified membrane was one order lower than the Nafion (N117) membrane. The proton conductivity of the composite membranes are obtained by fitting the EIS data in an equivalent circuit model. The composite membrane provides higher proton conductivity at reduced relative humidity conditions and the proton transport was governed by Grotthus mechanism. The modified membrane provides the maximum power density of 44mW/cm2 at a current density of 140mA/cm2. The durability test was conducted at a current density of 0.15 Acm2 and 70°C for 144h to evaluate fuel cell performance and voltage decay. The durability study confirms that the modified membrane provides higher cell stability with marginal drop in cell voltage (1.76%). The reduction of methanol cross-over and the enhancement of membrane selectivity increases power density of the direct methanol fuel cell.
{"title":"Preparation and characterization of Red Mud modified Chitosan-PVA composite membrane for direct methanol fuel cell","authors":"Rabiranjan Murmu, Debashis Roy, Sarat Chandra Patra, H. Sutar, Bishnu Choudhary","doi":"10.1115/1.4055693","DOIUrl":"https://doi.org/10.1115/1.4055693","url":null,"abstract":"\u0000 A novel cost effective Chitosan-PVA-Red Mud (RM) hybrid membranes are developed and their morphological and physiochemical properties are studied. The addition of RM enhanced IEC and bound water content in a composite membranes. The hydroxyl groups are consumed due to the interaction with silica oxides and depleted the crystalline phase of the composites. The tensile strength and modulus of the composite membranes were reduced. The addition of RM improves the thermal stability of the composite membrane and shifts the degradation process to a higher temperature. The RM nanoparticles depleted the hooping sites for methanol transport in the composite membrane and the permeability value reported in the modified membrane was one order lower than the Nafion (N117) membrane. The proton conductivity of the composite membranes are obtained by fitting the EIS data in an equivalent circuit model. The composite membrane provides higher proton conductivity at reduced relative humidity conditions and the proton transport was governed by Grotthus mechanism. The modified membrane provides the maximum power density of 44mW/cm2 at a current density of 140mA/cm2. The durability test was conducted at a current density of 0.15 Acm2 and 70°C for 144h to evaluate fuel cell performance and voltage decay. The durability study confirms that the modified membrane provides higher cell stability with marginal drop in cell voltage (1.76%). The reduction of methanol cross-over and the enhancement of membrane selectivity increases power density of the direct methanol fuel cell.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43360968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jiayu Yu, Shuai Yin, Gangyi Xiong, Xianggang Guan, J. Xia, Jiajie Li, Shichao Zhang, Yalan Xing, P. Yang
Porous metallic materials are widely used for lithium-ion battery (LIB) electrodes because of their low density, efficient ionic/electron pathways, and high specific surface area. In this study, we fabricate nanoporous Cu using chemical and electrochemical dealloying methods based on a Cu-Ga alloy. The effects of the dealloying conditions on the derived microstructure of the nanoporous metal and its evolution mechanisms are discussed. Analysis and control of the electrochemical dealloying process reveal that the sample morphology can be adjusted and the phase component can be controlled. Accordingly, a 3D CuGa2 electrode with a nanoporous structure is controllable synthesized, and it exhibits a higher specific capacity and cyclic stability than a 2D CuGa2 electrode when used as a LIB anode.
{"title":"Controllable dealloying of a Cu-Ga alloy and its application as an anode material for lithium-ion batteries","authors":"Jiayu Yu, Shuai Yin, Gangyi Xiong, Xianggang Guan, J. Xia, Jiajie Li, Shichao Zhang, Yalan Xing, P. Yang","doi":"10.1115/1.4055695","DOIUrl":"https://doi.org/10.1115/1.4055695","url":null,"abstract":"\u0000 Porous metallic materials are widely used for lithium-ion battery (LIB) electrodes because of their low density, efficient ionic/electron pathways, and high specific surface area. In this study, we fabricate nanoporous Cu using chemical and electrochemical dealloying methods based on a Cu-Ga alloy. The effects of the dealloying conditions on the derived microstructure of the nanoporous metal and its evolution mechanisms are discussed. Analysis and control of the electrochemical dealloying process reveal that the sample morphology can be adjusted and the phase component can be controlled. Accordingly, a 3D CuGa2 electrode with a nanoporous structure is controllable synthesized, and it exhibits a higher specific capacity and cyclic stability than a 2D CuGa2 electrode when used as a LIB anode.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48425107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Chang, Chengcheng Tao, Shaojin Wang, Ruhang Zhang, Aina Tian, Jiuchun Jiang
Due to the frequent occurrence of electric vehicles safety accidents caused by battery system failures, in order to ensure the normal operation of the vehicle, it is crucial to do fault diagnosis of the electric vehicle lithium battery. This paper presents a fault diagnosis method for lithium batteries based on optimal variational modal decomposition and dimensionless feature parameters for identifying faulty batteries. The method firstly preprocesses the voltage signal of lithium battery by optimal variable mode decomposition to obtain the high and low frequency components of the signal, and reconstructs the high and low frequency components. Then the dimensionless feature parameters are extracted according to the reconstructed signal and feature reduction of the dimensionless feature parameters is carried out by a local linear embedding algorithm. Finally, a local outlier factor algorithm is used to detect faulty batteries. After verified by the operation data before the real electric vehicles thermal runaway failure, this method can detect the faulty battery timely and accurately.
{"title":"A fault diagnosis method for lithium batteries based on optimal variational modal decomposition and dimensionless feature parameters","authors":"C. Chang, Chengcheng Tao, Shaojin Wang, Ruhang Zhang, Aina Tian, Jiuchun Jiang","doi":"10.1115/1.4055536","DOIUrl":"https://doi.org/10.1115/1.4055536","url":null,"abstract":"\u0000 Due to the frequent occurrence of electric vehicles safety accidents caused by battery system failures, in order to ensure the normal operation of the vehicle, it is crucial to do fault diagnosis of the electric vehicle lithium battery. This paper presents a fault diagnosis method for lithium batteries based on optimal variational modal decomposition and dimensionless feature parameters for identifying faulty batteries. The method firstly preprocesses the voltage signal of lithium battery by optimal variable mode decomposition to obtain the high and low frequency components of the signal, and reconstructs the high and low frequency components. Then the dimensionless feature parameters are extracted according to the reconstructed signal and feature reduction of the dimensionless feature parameters is carried out by a local linear embedding algorithm. Finally, a local outlier factor algorithm is used to detect faulty batteries. After verified by the operation data before the real electric vehicles thermal runaway failure, this method can detect the faulty battery timely and accurately.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45472398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aina Tian, Chen Yang, Yang Gao, Yan Jiang, C. Chang, Lujun Wang, Jiuchun Jiang
Battery aging is an inevitable macroscopic phenomenon in the use of the battery, which is characterized by capacity decline and power reduction. If the charging and discharging strategy does not adjusted with the aging state, it is easy to cause battery abuse and accelerate the decline. In order to avoid this situation, the aging model with consideration of the battery degradation is coupled into the pseudo-two-dimensional (P2D) model. An aging effect-aware finite element model that can describe battery physical information accurately is presented in this paper. The model parameters are divided into four parts: structure parameters, thermodynamic parameters, kinetic parameters and aging parameters. The identification experiments are designed based on the characteristics of these types of parameters. The decoupling and parameter identification methods of kinetic parameters according to the response characteristics of each parameter under specific excitation, and state of charge (SOC) partitioned range identification technology of aging parameters are proposed and verified. Finally, the aging effect-aware model and the identification parameters are verified under constant current (CC) and different dynamic conditions with different charge rate (C-rate). And the ability of the proposed model to track the aging trajectory in the whole life cycle is verified under various cycle conditions. The proposed model can be applied to aging mechanism analysis and health management from point of inner properties of the batteries.
{"title":"Aging effect-aware finite element model and parameter identification method of Lithium-ion battery","authors":"Aina Tian, Chen Yang, Yang Gao, Yan Jiang, C. Chang, Lujun Wang, Jiuchun Jiang","doi":"10.1115/1.4055463","DOIUrl":"https://doi.org/10.1115/1.4055463","url":null,"abstract":"\u0000 Battery aging is an inevitable macroscopic phenomenon in the use of the battery, which is characterized by capacity decline and power reduction. If the charging and discharging strategy does not adjusted with the aging state, it is easy to cause battery abuse and accelerate the decline. In order to avoid this situation, the aging model with consideration of the battery degradation is coupled into the pseudo-two-dimensional (P2D) model. An aging effect-aware finite element model that can describe battery physical information accurately is presented in this paper. The model parameters are divided into four parts: structure parameters, thermodynamic parameters, kinetic parameters and aging parameters. The identification experiments are designed based on the characteristics of these types of parameters. The decoupling and parameter identification methods of kinetic parameters according to the response characteristics of each parameter under specific excitation, and state of charge (SOC) partitioned range identification technology of aging parameters are proposed and verified. Finally, the aging effect-aware model and the identification parameters are verified under constant current (CC) and different dynamic conditions with different charge rate (C-rate). And the ability of the proposed model to track the aging trajectory in the whole life cycle is verified under various cycle conditions. The proposed model can be applied to aging mechanism analysis and health management from point of inner properties of the batteries.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63503807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Hua, H. Fei, Linjie Zheng, Du Zhengyao, Tang Kewen
It is of great significance to develop efficient and robust oxygen evolution reaction (OER) electrocatalysts based on inexpensive and earth-abundant materials to enable water splitting as a future renewable energy source. Herein, the in situ grown CoMn-MOF-74 on nickel foam and their use as active electrodes for high-performance water-oxidation catalysis are reported. In alkaline media, the binder-free 3D electrode shows superior OER activity with a current density of 10 mA cm−2 at a small overpotential of 260 mV, a Tafel slope of 58.2 mV dec−1, as well as excellent stability, making it one of the most active OER catalysts. Such high performance is attributed to increased electrochemically-active areas, accelerated electron transport capability and the synergy between MOFs and Ni substrate. This work elucidates a promising electrode for electrochemical water oxidation and enriches direct application of MOF materials for future clean energy conversion and storage systems.
基于廉价且富含地球的材料开发高效、稳健的析氧反应（OER）电催化剂，使水分解成为未来的可再生能源，具有重要意义。本文报道了在泡沫镍上原位生长的CoMn-MOF-74及其作为高性能水氧化催化活性电极的应用。在碱性介质中，无粘合剂的3D电极显示出优异的OER活性，在260 mV的小过电位下，电流密度为10 mA cm−2，Tafel斜率为58.2 mV dec−1，以及优异的稳定性，使其成为最具活性的OER催化剂之一。这种高性能归因于增加的电化学活性区域、加速的电子传输能力以及MOFs和Ni衬底之间的协同作用。这项工作阐明了一种很有前途的电化学水氧化电极，并丰富了MOF材料在未来清洁能源转换和存储系统中的直接应用。
{"title":"In Situ Grown CoMn-Based Metal-Organic Framework on Nickel Foam as Efficient and Robust Electrodes for Electrochemical Oxygen Evolution Reaction","authors":"L. Hua, H. Fei, Linjie Zheng, Du Zhengyao, Tang Kewen","doi":"10.1115/1.4055462","DOIUrl":"https://doi.org/10.1115/1.4055462","url":null,"abstract":"\u0000 It is of great significance to develop efficient and robust oxygen evolution reaction (OER) electrocatalysts based on inexpensive and earth-abundant materials to enable water splitting as a future renewable energy source. Herein, the in situ grown CoMn-MOF-74 on nickel foam and their use as active electrodes for high-performance water-oxidation catalysis are reported. In alkaline media, the binder-free 3D electrode shows superior OER activity with a current density of 10 mA cm−2 at a small overpotential of 260 mV, a Tafel slope of 58.2 mV dec−1, as well as excellent stability, making it one of the most active OER catalysts. Such high performance is attributed to increased electrochemically-active areas, accelerated electron transport capability and the synergy between MOFs and Ni substrate. This work elucidates a promising electrode for electrochemical water oxidation and enriches direct application of MOF materials for future clean energy conversion and storage systems.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43084965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Buyi Zhang, Bei Fan, Zhi Huang, Kenneth Higa, V. Battaglia, R. Prasher
Dispersion drying is an essential step in an enormous number of research and industry fields, including self-assembly, membrane fabrication, printing, battery electrode fabrication, painting, and large-scale solar cell fabrication. The drying process of a dispersion directly influences the structure and properties of the resulting dried film. Thus, it is important to investigate the underlying physics of dispersion drying and the effects of different drying parameters. This article reviews modeling studies of coating drying processes, along with corresponding experimental observations. We have divided drying processes into two conceptual stages. In the first drying stage, liquid evaporation, particle sedimentation and Brownian motion compete and affect the particle distribution during drying and thus in the final film structure. We have included a comprehensive discussion of the influences of drying parameters, such as evaporation rate, particle sizes and temperature, on the above competition and the resulting film structure. A drying regime map describing where different drying phenomena dominate was formulated based on the literature. We also extended our discussion to the practical applications of battery slurry drying an essential step in conventional battery electrode manufacturing. In the second drying stage, the physics of porous drying and crack formation are reviewed. This review aims to provide a comprehensive understanding of dispersion drying mechanisms and to provide guidance in the design of film products with favorable structures and properties for targeted practical applications.
{"title":"A Review of Dispersion Film Drying Research","authors":"Buyi Zhang, Bei Fan, Zhi Huang, Kenneth Higa, V. Battaglia, R. Prasher","doi":"10.1115/1.4055392","DOIUrl":"https://doi.org/10.1115/1.4055392","url":null,"abstract":"\u0000 Dispersion drying is an essential step in an enormous number of research and industry fields, including self-assembly, membrane fabrication, printing, battery electrode fabrication, painting, and large-scale solar cell fabrication. The drying process of a dispersion directly influences the structure and properties of the resulting dried film. Thus, it is important to investigate the underlying physics of dispersion drying and the effects of different drying parameters. This article reviews modeling studies of coating drying processes, along with corresponding experimental observations. We have divided drying processes into two conceptual stages. In the first drying stage, liquid evaporation, particle sedimentation and Brownian motion compete and affect the particle distribution during drying and thus in the final film structure. We have included a comprehensive discussion of the influences of drying parameters, such as evaporation rate, particle sizes and temperature, on the above competition and the resulting film structure. A drying regime map describing where different drying phenomena dominate was formulated based on the literature. We also extended our discussion to the practical applications of battery slurry drying an essential step in conventional battery electrode manufacturing. In the second drying stage, the physics of porous drying and crack formation are reviewed. This review aims to provide a comprehensive understanding of dispersion drying mechanisms and to provide guidance in the design of film products with favorable structures and properties for targeted practical applications.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47306733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Solid oxide fuel cell(SOFC) is a clean and efficient energy utilization technology. Partial oxidation reforming(POX) can be used to simplify SOFC system structure, but its lower hydrogen production rate deteriorates system performance. A wise method may be combining anode off gas recirculation(AOGR) and cathode off gas recirculation(COGR) with POX. Thus, their influence on the coupled system of intermediate temperature SOFC and POX is researched in detail in this paper. Results show that the reforming process gradually changes from exothermic to endothermic as AOGR rate increases. Meanwhile, its oxygen demand declines sharply and the process can even be self-sustained without external air input at the AOGR rate of 0.5 and 0.6. The application of AOGR can improve electrical efficiency up to 51%, but at the expense of thermal efficiency. Excessive AOGR rates will result in decreased cell voltage and insufficient energy supply to the after-burner, so it should be restricted within a reasonable range and the best recommended value is 0.5. The application of COGR has little effect on fuel line parameters, so it cause little deterioration in electrical efficiency while improving thermal efficiency. Besides, cell voltage is also insensitive to it. The combination of AOGR and COGR can obtain better fuel economy and larger cogeneration scale simultaneously at the cost of a tiny electrical output power, while an optimal balance between three efficiencies is also achieved.
{"title":"Influence of off gas recirculation on the intermediate temperature SOFC with POX reformer","authors":"Siyuan Li, Zhe Zhang, Guo-xiang Li, Shuzhan Bai","doi":"10.1115/1.4055393","DOIUrl":"https://doi.org/10.1115/1.4055393","url":null,"abstract":"\u0000 Solid oxide fuel cell(SOFC) is a clean and efficient energy utilization technology. Partial oxidation reforming(POX) can be used to simplify SOFC system structure, but its lower hydrogen production rate deteriorates system performance. A wise method may be combining anode off gas recirculation(AOGR) and cathode off gas recirculation(COGR) with POX. Thus, their influence on the coupled system of intermediate temperature SOFC and POX is researched in detail in this paper. Results show that the reforming process gradually changes from exothermic to endothermic as AOGR rate increases. Meanwhile, its oxygen demand declines sharply and the process can even be self-sustained without external air input at the AOGR rate of 0.5 and 0.6. The application of AOGR can improve electrical efficiency up to 51%, but at the expense of thermal efficiency. Excessive AOGR rates will result in decreased cell voltage and insufficient energy supply to the after-burner, so it should be restricted within a reasonable range and the best recommended value is 0.5. The application of COGR has little effect on fuel line parameters, so it cause little deterioration in electrical efficiency while improving thermal efficiency. Besides, cell voltage is also insensitive to it. The combination of AOGR and COGR can obtain better fuel economy and larger cogeneration scale simultaneously at the cost of a tiny electrical output power, while an optimal balance between three efficiencies is also achieved.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41998426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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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