Pub Date : 2024-02-09DOI: 10.1149/2754-2734/ad27dc
Ram Krishna Hona, Ebony Schultz, Mandy Guinn, Alexa D. Azure
We investigated the utility of Ca2FeMnO6-δ and Sr2FeMnO6-δ as materials with low thermal conductivity, finding potential applications in thermoelectrics, electronics, solar devices, and gas turbines for land and aerospace use. These compounds, characterized as oxygen-deficient perovskites, feature distinct vacancy arrangements. Ca2FeMnO6-δ adopts a brownmillerite-type orthorhombic structure with ordered vacancy arrangement, while Sr2FeMnO6-δ adopts a perovskite cubic structure with disordered vacancy distribution. Notably, both compounds exhibit remarkably low thermal conductivity, measuring below 0.50 Wm-1K-1. This places them among the materials with the lowest thermal conductivity reported for perovskites. The observed low thermal conductivity is attributed to oxygen vacancies and phonon scattering. Interestingly as scanning electron microscopy images show the smaller grain size, our findings suggest that the creation of vacancies and lowering the grain size or increasing the grain boundaries play a crucial role in achieving such low thermal conductivity values. This characteristic enhances the potential of these materials for applications where efficient heat dissipation, safety, and equipment longevity are paramount.
{"title":"Comparative Thermal Insulation Nature of Ca2FeMnO6-δ and Sr2FeMnO6-δ","authors":"Ram Krishna Hona, Ebony Schultz, Mandy Guinn, Alexa D. Azure","doi":"10.1149/2754-2734/ad27dc","DOIUrl":"https://doi.org/10.1149/2754-2734/ad27dc","url":null,"abstract":"\u0000 We investigated the utility of Ca2FeMnO6-δ and Sr2FeMnO6-δ as materials with low thermal conductivity, finding potential applications in thermoelectrics, electronics, solar devices, and gas turbines for land and aerospace use. These compounds, characterized as oxygen-deficient perovskites, feature distinct vacancy arrangements. Ca2FeMnO6-δ adopts a brownmillerite-type orthorhombic structure with ordered vacancy arrangement, while Sr2FeMnO6-δ adopts a perovskite cubic structure with disordered vacancy distribution. Notably, both compounds exhibit remarkably low thermal conductivity, measuring below 0.50 Wm-1K-1. This places them among the materials with the lowest thermal conductivity reported for perovskites. The observed low thermal conductivity is attributed to oxygen vacancies and phonon scattering. Interestingly as scanning electron microscopy images show the smaller grain size, our findings suggest that the creation of vacancies and lowering the grain size or increasing the grain boundaries play a crucial role in achieving such low thermal conductivity values. This characteristic enhances the potential of these materials for applications where efficient heat dissipation, safety, and equipment longevity are paramount.","PeriodicalId":489350,"journal":{"name":"ECS advances","volume":" 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139788646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-05DOI: 10.1149/2754-2734/ad1270
Hyungwon Kim, Sungmin Lim, K. Ryoo, Insik Choi, B. Choi, Jaeyoung Kim, Younwon Jung
Electrically nonconducting UPW was electrolyzed without electrolyte through an anion exchange membrane for evaluating applicability to EUV semiconductor cleaning. The anode water produced held positive ORP up to 900 mV, which is very oxidative. ORP, pH, and conductivity measurements were complementary for understanding anode water. Correlation of concurrent ORP decrease and conductivity increase in ultra-pure anode water domain was observed first the time. The oxidative OHo was formed as the major species in anode water, causing positive ORP during ORP measurement. H+ and OH− ions, and OHo radical co-existed in anode water at amphoteric non-equilibrium, while pH was less than 6. It was concluded that OHo, as a strong oxidant, transformed itself to OH− by ORP measurement. OHo radical would oxidize selectively and then remove nano-contaminants. Anode water is considered to fulfill the requirement of EUV semiconductor cleaning where no oxygen species should be required because of likely oxide layer formation during cleaning, and it will even remove the native oxide developed unintentionally before cleaning.
{"title":"Evaluation of Anode Water Electrolyzed with Anion Exchange Membrane for Cleaning EUV Semiconductor","authors":"Hyungwon Kim, Sungmin Lim, K. Ryoo, Insik Choi, B. Choi, Jaeyoung Kim, Younwon Jung","doi":"10.1149/2754-2734/ad1270","DOIUrl":"https://doi.org/10.1149/2754-2734/ad1270","url":null,"abstract":"\u0000 Electrically nonconducting UPW was electrolyzed without electrolyte through an anion exchange membrane for evaluating applicability to EUV semiconductor cleaning. The anode water produced held positive ORP up to 900 mV, which is very oxidative. ORP, pH, and conductivity measurements were complementary for understanding anode water. Correlation of concurrent ORP decrease and conductivity increase in ultra-pure anode water domain was observed first the time. The oxidative OHo was formed as the major species in anode water, causing positive ORP during ORP measurement. H+ and OH− ions, and OHo radical co-existed in anode water at amphoteric non-equilibrium, while pH was less than 6. It was concluded that OHo, as a strong oxidant, transformed itself to OH− by ORP measurement. OHo radical would oxidize selectively and then remove nano-contaminants. Anode water is considered to fulfill the requirement of EUV semiconductor cleaning where no oxygen species should be required because of likely oxide layer formation during cleaning, and it will even remove the native oxide developed unintentionally before cleaning.","PeriodicalId":489350,"journal":{"name":"ECS advances","volume":"80 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138597970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.1149/2754-2734/ad120d
V. Jain, Y.N. Doshi, Mona Shah, Jaymin Ray, Abhitosh kedia, Dimple V Shah, Kinjal Patel
Nanomaterial based water degradation is becoming as a promising option in comparison to conventional water degradation methods. MoO3 nanoparticles have been used as a nano adsorbent for methylene blue (MB) removal from aqueous solution. Here, effect of vanadium (V) element doping in MoO3 on adsorption activity against MB was studied. 2%, 4%, 6% and 8% of V element doped MoO3 nanoparticles were synthesized using surfactant free chemical method. All the synthesized nanoparticles were well characterized through different analysis tools to study their structural, morphological, and optical properties. Stability of particles in water with respect to time was also studied by zeta potential. Adsorption activity of all the samples were carried out and 8% doped MoO3 nanoparticle was found to be most efficient. Moreover, the regeneration and reusability test of 8% doped MoO3 nanoparticle was also successfully carried out.
{"title":"Enhancing Dye Degradation Property of MoO3 Nanoplates by Vanadium Doping","authors":"V. Jain, Y.N. Doshi, Mona Shah, Jaymin Ray, Abhitosh kedia, Dimple V Shah, Kinjal Patel","doi":"10.1149/2754-2734/ad120d","DOIUrl":"https://doi.org/10.1149/2754-2734/ad120d","url":null,"abstract":"\u0000 Nanomaterial based water degradation is becoming as a promising option in comparison to conventional water degradation methods. MoO3 nanoparticles have been used as a nano adsorbent for methylene blue (MB) removal from aqueous solution. Here, effect of vanadium (V) element doping in MoO3 on adsorption activity against MB was studied. 2%, 4%, 6% and 8% of V element doped MoO3 nanoparticles were synthesized using surfactant free chemical method. All the synthesized nanoparticles were well characterized through different analysis tools to study their structural, morphological, and optical properties. Stability of particles in water with respect to time was also studied by zeta potential. Adsorption activity of all the samples were carried out and 8% doped MoO3 nanoparticle was found to be most efficient. Moreover, the regeneration and reusability test of 8% doped MoO3 nanoparticle was also successfully carried out.","PeriodicalId":489350,"journal":{"name":"ECS advances","volume":"54 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138602062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-04DOI: 10.1149/2754-2734/ad120c
Vladimir Egorov, U. Gulzar, C. O’Dwyer
Here we describe the modeling and design evolution of vat polimerized (Vat-P) stereolithographic apparatus (SLA) 3D printed coin cell-type aqueous and non-aqueous rechargeable lithium-ion batteries, cases and current collectors. We detail the rationale for design evolution that improved performance, handling and assembly of the printed batteries. Some guidance into the modeling, 3D printing process, material choice, chemical and electrochemical stability, assembly, sealing, and performance of 3D printed Li-ion batteries is outlined. 3D printed Li-ion batteries demonstrated promising results in terms of gravimetric capacity, rate capability, and capacity per unit footprint area compared to conventional coin cells in both aqueous and non-aqueous systems. For aqueous cells, the cell level capacity is a factor of 2–3x higher than similar metal coin cells due to the lighter weight and better rate response. We also outline design requirements for a Vat-P printed battery that are compatible with organic carbonate-based electrolytes, where the cell provides 115 mAh g−1 specific capacity using an LiCoO2–graphite chemistry, which is only ∼20% less than the maximum reversible capacity of LCO. Despite the challenges faced in optimizing the design and materials for 3D printed Li-ion batteries, this study provides valuable information for future research and development.
本文描述了还原聚合物(vat - p)立体光刻设备(SLA) 3D打印硬币电池型水和非水可充电锂离子电池、外壳和集流器的建模和设计演变。我们详细介绍了改进性能、处理和组装印刷电池的设计演变的基本原理。概述了3D打印锂离子电池的建模、3D打印工艺、材料选择、化学和电化学稳定性、组装、密封和性能方面的一些指导。与传统硬币电池相比，3D打印锂离子电池在重量容量、速率能力和单位占地面积容量方面都表现出了良好的效果，无论是在水系统还是非水系统中。对于含水电池，由于重量更轻和速率响应更好，电池水平容量比类似的金属硬币电池高2 - 3倍。我们还概述了与有机碳酸盐基电解质兼容的Vat-P印刷电池的设计要求，其中电池使用licoo2 -石墨化学提供115 mAh g - 1比容量，仅比LCO的最大可逆容量小约20%。尽管在优化3D打印锂离子电池的设计和材料方面面临挑战，但该研究为未来的研究和发展提供了有价值的信息。
{"title":"3D Printed Rechargeable Aqueous and Non-Aqueous Lithium-Ion Batteries: Evolution of Design and Performance","authors":"Vladimir Egorov, U. Gulzar, C. O’Dwyer","doi":"10.1149/2754-2734/ad120c","DOIUrl":"https://doi.org/10.1149/2754-2734/ad120c","url":null,"abstract":"Here we describe the modeling and design evolution of vat polimerized (Vat-P) stereolithographic apparatus (SLA) 3D printed coin cell-type aqueous and non-aqueous rechargeable lithium-ion batteries, cases and current collectors. We detail the rationale for design evolution that improved performance, handling and assembly of the printed batteries. Some guidance into the modeling, 3D printing process, material choice, chemical and electrochemical stability, assembly, sealing, and performance of 3D printed Li-ion batteries is outlined. 3D printed Li-ion batteries demonstrated promising results in terms of gravimetric capacity, rate capability, and capacity per unit footprint area compared to conventional coin cells in both aqueous and non-aqueous systems. For aqueous cells, the cell level capacity is a factor of 2–3x higher than similar metal coin cells due to the lighter weight and better rate response. We also outline design requirements for a Vat-P printed battery that are compatible with organic carbonate-based electrolytes, where the cell provides 115 mAh g−1 specific capacity using an LiCoO2–graphite chemistry, which is only ∼20% less than the maximum reversible capacity of LCO. Despite the challenges faced in optimizing the design and materials for 3D printed Li-ion batteries, this study provides valuable information for future research and development.","PeriodicalId":489350,"journal":{"name":"ECS advances","volume":"4 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138601303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A critical analysis of the physical state {solid or liquid state} of the PEO-LiTFSI system was investigated in this study. The findings show one crystallite type in PEO and four in LiTFSI. The physical state of the binary mixture PEO-LiTFSI is predominate by the semi-crystalline properties of pure PEO when we is lower than 33 wt.%, and the crystallization of the mixture is only induced by PEO. Nevertheless, LiTFSI reduces the degree of crystallinity of PEO due to its solvation by a part of PEO crystallites. Besides, as the solubility limit of LiTFSI in PEO is achieved, salt crystallites appear within the resulting electrolyte. These crystallites in the high we domain were identified as LiTFSI crystallites complexed with PEO. However, rising temperature promotes their dissolution. The functional groups implicated in the crystallization of PEO-LiTFSI have been highlighted using the IR technique. Besides, the experimental result shows that the glass transition temperature (Tg) and the melting point (Tm) of the binary mixture exhibit a non-linear trend with we and Mw. A simple mathematical treatment is proposed to predict glass transition temperature as a function of we and Mw. Our model considers the additive effect of lithium salt on the Tg variation.
{"title":"Investigating the Physical State of Polymer Electrolyte: Influence of Temperature and LiTFSI Concentration on the Phase of the Different States of the Polymer Electrolyte PEO-LiTFSI","authors":"Sanatou Toe, Jean-Christophe Remigy, Lucie Leveau, F. Chauvet, Youcef Kerdja, Theodore Tzedakis","doi":"10.1149/2754-2734/ad119d","DOIUrl":"https://doi.org/10.1149/2754-2734/ad119d","url":null,"abstract":"\u0000 A critical analysis of the physical state {solid or liquid state} of the PEO-LiTFSI system was investigated in this study. The findings show one crystallite type in PEO and four in LiTFSI. The physical state of the binary mixture PEO-LiTFSI is predominate by the semi-crystalline properties of pure PEO when we is lower than 33 wt.%, and the crystallization of the mixture is only induced by PEO. Nevertheless, LiTFSI reduces the degree of crystallinity of PEO due to its solvation by a part of PEO crystallites. Besides, as the solubility limit of LiTFSI in PEO is achieved, salt crystallites appear within the resulting electrolyte. These crystallites in the high we domain were identified as LiTFSI crystallites complexed with PEO. However, rising temperature promotes their dissolution. The functional groups implicated in the crystallization of PEO-LiTFSI have been highlighted using the IR technique. Besides, the experimental result shows that the glass transition temperature (Tg) and the melting point (Tm) of the binary mixture exhibit a non-linear trend with we and Mw. A simple mathematical treatment is proposed to predict glass transition temperature as a function of we and Mw. Our model considers the additive effect of lithium salt on the Tg variation.","PeriodicalId":489350,"journal":{"name":"ECS advances","volume":"22 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138606810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：