Jinjing Du, Y. Guo, Meng Zhou, Ya-ru Cui, Bin Wang, Qian Li, Jun Zhu, Dandan Zhao
We present a simple method for producing SiO2 modified LNMO cathode materials. Manganese carbonate was directly mixed with nickel nitrate and lithium hydroxide, and a spherical structure LNMO cathode material was prepared by two-step calcination, then ethyl orthosilicate and LNMO powder were simply mixed in solid and liquid phase to prepare SiO2-coated LNMO material. The effect of SiO2 coating on the structure of LNMO was studied by XRD, SEM, TEM, TG-DSC. An amorphous SiO2 coating layer developed on the surface of the LNMO particles in the modification, and this could alleviate the strike of HF caused by electrolyte decomposition as well as the development of a solid electrolyte interphase. The electrochemical performance of the coated material was as follows: when the amount of SiO2 was 0wt%, 1wt%, 2wt% and 3wt%, the initial discharge capacity of the sample was 98.2, 84.1, 101.3 and 89.8mAh·g−1, respectively. After 50 charge-discharge cycles, the capacity retention rates are 92.7%, 66.8%, 97.9% and 93.8%, respectively. The cyclic stability of the samples can be significantly improved when the SiO2 coating amount is 2wt% and 3wt%, indicating that SiO2 coating can not only improve the discharge specific capacity of the material, but also improve its cyclic stability.
{"title":"Effect of SiO2 coating on microstructure and electrochemical properties of LiNi0.5Mn1.5O4 cathode material","authors":"Jinjing Du, Y. Guo, Meng Zhou, Ya-ru Cui, Bin Wang, Qian Li, Jun Zhu, Dandan Zhao","doi":"10.1115/1.4062161","DOIUrl":"https://doi.org/10.1115/1.4062161","url":null,"abstract":"We present a simple method for producing SiO2 modified LNMO cathode materials. Manganese carbonate was directly mixed with nickel nitrate and lithium hydroxide, and a spherical structure LNMO cathode material was prepared by two-step calcination, then ethyl orthosilicate and LNMO powder were simply mixed in solid and liquid phase to prepare SiO2-coated LNMO material. The effect of SiO2 coating on the structure of LNMO was studied by XRD, SEM, TEM, TG-DSC. An amorphous SiO2 coating layer developed on the surface of the LNMO particles in the modification, and this could alleviate the strike of HF caused by electrolyte decomposition as well as the development of a solid electrolyte interphase. The electrochemical performance of the coated material was as follows: when the amount of SiO2 was 0wt%, 1wt%, 2wt% and 3wt%, the initial discharge capacity of the sample was 98.2, 84.1, 101.3 and 89.8mAh·g−1, respectively. After 50 charge-discharge cycles, the capacity retention rates are 92.7%, 66.8%, 97.9% and 93.8%, respectively. The cyclic stability of the samples can be significantly improved when the SiO2 coating amount is 2wt% and 3wt%, indicating that SiO2 coating can not only improve the discharge specific capacity of the material, but also improve its cyclic stability.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47448738","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}
The shift away from fossil fuels for modern day energy requirements has resulted in a higher demand for electric vehicles and has led to a critical role for lithium-ion batteries. Next generation higher capacity electrode materials are needed to meet the demands of future electric vehicles. Lithium-ion batteries function optimally around room temperature (23°C), but discharge capacity diminishes rapidly below 0°C and significantly affects population living in colder climates. Higher capacity electrode materials such as silicon need to be paired with new electrolytes that favor ideal low temperature performance. This work pairs a typical nickel rich lithium cathode with a modified silicon anode and a ternary carbonate/ester electrolyte to demonstrate improved discharge capacity at sub zero temperature.
{"title":"Modified Silicon Anode for Improved Low Temperature Performance of Lithium-ion Batteries","authors":"Jason A. Mennel, D. Chidambaram","doi":"10.1115/1.4062163","DOIUrl":"https://doi.org/10.1115/1.4062163","url":null,"abstract":"\u0000 The shift away from fossil fuels for modern day energy requirements has resulted in a higher demand for electric vehicles and has led to a critical role for lithium-ion batteries. Next generation higher capacity electrode materials are needed to meet the demands of future electric vehicles. Lithium-ion batteries function optimally around room temperature (23°C), but discharge capacity diminishes rapidly below 0°C and significantly affects population living in colder climates. Higher capacity electrode materials such as silicon need to be paired with new electrolytes that favor ideal low temperature performance. This work pairs a typical nickel rich lithium cathode with a modified silicon anode and a ternary carbonate/ester electrolyte to demonstrate improved discharge capacity at sub zero temperature.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49274028","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}
Hengjie Shen, Minghai Li, Yan Wang, Hewu Wang, Xuning Feng, Juan Wang
In this study, based on the liquid cooling method, A confluence channel structure is proposed, and the heat generation model in the discharge process of three-dimensional battery module is established. The effects of channel structure, inlet mass flow rate and coolant flow direction on the heat generation of battery module were studied by control variable method. Simulation results show that the confluence channel structure ( e ) shows good cooling effect on the battery temperature when controlling the 5 C discharge of the battery module. In addition, compared with the straight channel under the same working condition. In the discharge process of battery module, Average temperature amplitude in battery module decreased by 17.3 %, the inlet and outlet pressure is reduced by 16.47 %, and the maximum temperature amplitude is reduced by 20.3 %. Effectively improve temperature uniformity and reduce pressure drop. The problem of uneven temperature distribution caused by uneven velocity distribution of coolant in traditional straight channel is improved. At the same time, the design of the confluence structure accelerates the heat transfer of the channel plate and provides a new idea for the design of the cooling channel.
{"title":"Effect of Liquid Cooling Structure of Confluence Channel on Thermal Performance of Lithium-Ion Batteries","authors":"Hengjie Shen, Minghai Li, Yan Wang, Hewu Wang, Xuning Feng, Juan Wang","doi":"10.1115/1.4062080","DOIUrl":"https://doi.org/10.1115/1.4062080","url":null,"abstract":"\u0000 In this study, based on the liquid cooling method, A confluence channel structure is proposed, and the heat generation model in the discharge process of three-dimensional battery module is established. The effects of channel structure, inlet mass flow rate and coolant flow direction on the heat generation of battery module were studied by control variable method. Simulation results show that the confluence channel structure ( e ) shows good cooling effect on the battery temperature when controlling the 5 C discharge of the battery module. In addition, compared with the straight channel under the same working condition. In the discharge process of battery module, Average temperature amplitude in battery module decreased by 17.3 %, the inlet and outlet pressure is reduced by 16.47 %, and the maximum temperature amplitude is reduced by 20.3 %. Effectively improve temperature uniformity and reduce pressure drop. The problem of uneven temperature distribution caused by uneven velocity distribution of coolant in traditional straight channel is improved. At the same time, the design of the confluence structure accelerates the heat transfer of the channel plate and provides a new idea for the design of the cooling channel.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45048777","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}
Abstract Nanoscale copper has been successfully integrated into a silicon-based anode via a cost-effective, one-step process. The additive was found to improve the overall electrical conductivity and charge/discharge cycling performance of the anode. Analysis of the new material shows that copper particles are homogeneously interspersed into the silicon active layer. The formation of Cu3Si during the annealing step of the fabrication process was also confirmed using X-ray diffraction and is thought to contribute to the structural stability of the anode during cycling. Despite the inclusion of only small quantities of the additive (approximately 3%), anodes with the added copper show significantly higher initial discharge capacity values (957 mAg−1) compared to anodes without copper (309 mAg−1), and they continue to outperform the latter after 100 charge/discharge cycles. Results also show a significant decrease in the resistance of anodes with the additive, a contributing factor in the improvement of the electrochemical performance.
{"title":"Improved Performance of Silicon Anodes Using Copper Nanoparticles as Additive","authors":"Gabrielle Bachand, Jason Mennel, Dev Chidambaram","doi":"10.1115/1.4056841","DOIUrl":"https://doi.org/10.1115/1.4056841","url":null,"abstract":"Abstract Nanoscale copper has been successfully integrated into a silicon-based anode via a cost-effective, one-step process. The additive was found to improve the overall electrical conductivity and charge/discharge cycling performance of the anode. Analysis of the new material shows that copper particles are homogeneously interspersed into the silicon active layer. The formation of Cu3Si during the annealing step of the fabrication process was also confirmed using X-ray diffraction and is thought to contribute to the structural stability of the anode during cycling. Despite the inclusion of only small quantities of the additive (approximately 3%), anodes with the added copper show significantly higher initial discharge capacity values (957 mAg−1) compared to anodes without copper (309 mAg−1), and they continue to outperform the latter after 100 charge/discharge cycles. Results also show a significant decrease in the resistance of anodes with the additive, a contributing factor in the improvement of the electrochemical performance.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136007376","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}
High-temperature polymer membrane fuel cells (HT-PEMFCs) are considered as the trend of PEMFC future development due to their accelerated electrochemical reaction kinetics, simplified water/thermal management, and improved tolerance to impurities (CO). As the core part of membrane electrode assembly in HT-PEMFC, the catalyst layer significantly affects the cost, performance, and lifetime of HT-PEMFC. However, due to the high temperature and acid environment in HT-PEMFC, platinum (Pt) catalyst degradation and carbon corrosion are accelerated. Moreover, the loss of phosphoric acid (PA) which serves as the proton conductor is observed after long-term operation. In addition, the adsorption of phosphate on Pt surface leads to the poor Pt utilization. Thus, high cost and fast performance decay must be addressed for the commercialization of HT-PEMFC. Optimizing the composition and structure of catalyst layer are demonstrated as effective strategies to resolve the problems. In this review, we first summarize the latest progress in the optimization of catalyst layer composition for HT-PEMFC, including catalysts, binders, electrolyte (PA), and additives. Thereafter, the structural characteristics of catalyst layer are introduced and the optimization strategies are reviewed. Finally, the current challenges and research perspectives of catalyst layer in HT-PEMFC are discussed.
{"title":"Optimization on composition and structure of catalyst layer for high-temperature polymer electrolyte membrane fuel cells","authors":"Meihui Tan, Huiyuan Liu, Huaneng Su, Weiqi Zhang","doi":"10.1115/1.4056990","DOIUrl":"https://doi.org/10.1115/1.4056990","url":null,"abstract":"\u0000 High-temperature polymer membrane fuel cells (HT-PEMFCs) are considered as the trend of PEMFC future development due to their accelerated electrochemical reaction kinetics, simplified water/thermal management, and improved tolerance to impurities (CO). As the core part of membrane electrode assembly in HT-PEMFC, the catalyst layer significantly affects the cost, performance, and lifetime of HT-PEMFC. However, due to the high temperature and acid environment in HT-PEMFC, platinum (Pt) catalyst degradation and carbon corrosion are accelerated. Moreover, the loss of phosphoric acid (PA) which serves as the proton conductor is observed after long-term operation. In addition, the adsorption of phosphate on Pt surface leads to the poor Pt utilization. Thus, high cost and fast performance decay must be addressed for the commercialization of HT-PEMFC. Optimizing the composition and structure of catalyst layer are demonstrated as effective strategies to resolve the problems. In this review, we first summarize the latest progress in the optimization of catalyst layer composition for HT-PEMFC, including catalysts, binders, electrolyte (PA), and additives. Thereafter, the structural characteristics of catalyst layer are introduced and the optimization strategies are reviewed. Finally, the current challenges and research perspectives of catalyst layer in HT-PEMFC are discussed.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45501066","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}
In this paper, a grouping equalization circuit based on the Single Ended Primary Inductor Converter (SEPIC) circuit is proposed, which can transfer energy between any single cell or grouped cells. Compared with the traditional equalization circuits that transfer energy between adjacent cells, the SEPIC circuit can directly connect any two batteries that need to be equalized; the number of circuit equalization paths is calculated based on a directed graph, then used as a basis for grouping the batteries to improve the equalization efficiency. In the charging or discharging condition, the amount of charge remaining in the battery to be charged or discharged is used as the control variable for equalization, and intra-group equalization is completed before inter-group equalization starts. To ensure the equalization efficiency of the battery, the equalization current is controlled by fuzzy logic control (FLC). Taking 10 single cells as an example based on the calculation of the number of equalization paths, two 5-cell groups can be confirmed as the optimal solution. Experiments were performed on Matlab/Simulink simulation platform, and the results show that compared with the traditional adjacent inductance equalization circuit, the equalization circuit proposed above reduces the time needed for equalization by 35.8%; Compared with the traditional average difference method, in charging and discharging conditions, the FLC algorithm saves times by 20.5% and 31.3% respectively, and energy loss is reduced by 9.1% and 5.5% respectively, which verifies the feasibility of the proposed equalization scheme.
{"title":"Fuzzy logic control-based charge/discharge equalization method for lithium-ion batteries","authors":"Tiezhou Wu, Feng Xu, Si Xu, Shu Sun","doi":"10.1115/1.4056989","DOIUrl":"https://doi.org/10.1115/1.4056989","url":null,"abstract":"\u0000 In this paper, a grouping equalization circuit based on the Single Ended Primary Inductor Converter (SEPIC) circuit is proposed, which can transfer energy between any single cell or grouped cells. Compared with the traditional equalization circuits that transfer energy between adjacent cells, the SEPIC circuit can directly connect any two batteries that need to be equalized; the number of circuit equalization paths is calculated based on a directed graph, then used as a basis for grouping the batteries to improve the equalization efficiency. In the charging or discharging condition, the amount of charge remaining in the battery to be charged or discharged is used as the control variable for equalization, and intra-group equalization is completed before inter-group equalization starts. To ensure the equalization efficiency of the battery, the equalization current is controlled by fuzzy logic control (FLC). Taking 10 single cells as an example based on the calculation of the number of equalization paths, two 5-cell groups can be confirmed as the optimal solution. Experiments were performed on Matlab/Simulink simulation platform, and the results show that compared with the traditional adjacent inductance equalization circuit, the equalization circuit proposed above reduces the time needed for equalization by 35.8%; Compared with the traditional average difference method, in charging and discharging conditions, the FLC algorithm saves times by 20.5% and 31.3% respectively, and energy loss is reduced by 9.1% and 5.5% respectively, which verifies the feasibility of the proposed equalization scheme.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47313242","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}
S. Zaidi, Shusil Sigdel, C. Sorensen, Gibum Kwon, Xiangling Li
This study reports the superior performance of graphene nanosheet (GNS) materials over Vulcan XC72 incorporated as cathode catalyst in Li-O2 battery. The GNSs employed were synthesized from a novel, eco-friendly and cost-effective technique involving chamber detonation of oxygen and acetylene precursors. Two GNS catalysts i.e., GNS-1 and GNS-2 fabricated with 0.3 and 0.5 O/C precursor molar ratios, respectively, were utilized. Specific surface area (SSA) analysis revealed significantly higher SSA and total pore volume for GNS-1 (180 m2 g−1, 0.505 cm3 g−1) as compared with GNS-2 (19 m2 g−1, 0.041 cm3 g−1). GNS-1 exhibited the highest discharge capacity (4.37 Ah g−1) and superior cycling stability compared with GNS-2 and Vulcan XC72. Moreover, GNS-1 showed promising performance at higher current densities (0.2 and 0.3 mA cm−2) and with various organic electrolytes. The superior performance of GNS-1 can be ascribed to its higher mesopore volume, SSA and optimum wettability compared to its counterparts.
{"title":"Incorporation of Novel Graphene Nanosheet Materials as Cathode Catalysts in Li-O2 Battery","authors":"S. Zaidi, Shusil Sigdel, C. Sorensen, Gibum Kwon, Xiangling Li","doi":"10.1115/1.4056937","DOIUrl":"https://doi.org/10.1115/1.4056937","url":null,"abstract":"\u0000 This study reports the superior performance of graphene nanosheet (GNS) materials over Vulcan XC72 incorporated as cathode catalyst in Li-O2 battery. The GNSs employed were synthesized from a novel, eco-friendly and cost-effective technique involving chamber detonation of oxygen and acetylene precursors. Two GNS catalysts i.e., GNS-1 and GNS-2 fabricated with 0.3 and 0.5 O/C precursor molar ratios, respectively, were utilized. Specific surface area (SSA) analysis revealed significantly higher SSA and total pore volume for GNS-1 (180 m2 g−1, 0.505 cm3 g−1) as compared with GNS-2 (19 m2 g−1, 0.041 cm3 g−1). GNS-1 exhibited the highest discharge capacity (4.37 Ah g−1) and superior cycling stability compared with GNS-2 and Vulcan XC72. Moreover, GNS-1 showed promising performance at higher current densities (0.2 and 0.3 mA cm−2) and with various organic electrolytes. The superior performance of GNS-1 can be ascribed to its higher mesopore volume, SSA and optimum wettability compared to its counterparts.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48351355","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}
To understand the dynamic failure mechanisms of cylindrical lithium-ion battery (LIB) under different impact loadings, the crushing behaviors of the 18650 LIBs were experimentally investigated in this work. The drop weight impact tests with different impactor heads were conducted to analyze the crushing responses of the LIBs. By changing the state of charge (SOC) of the battery, impactor types and impact energy, the force-electric responses of a LIB under multiple impacts were explored. Macro- and micro- deformation of the batteries were further exployed including SOC dependency and the failure modes of the separator. Results show that except for impact energy, the mechanical responses and failure behaviors of the LIBs under the repeated impacts also depended upon the SOC and impactor shapes. The relationship between impact velocity and minimum impact times was established when a hard internal short circuit (ISC) appeared to evaluate the dynamic safety of the LIBs. These results can provide guidance for the crashworthiness design and safety assessment of the batteries under multiple impacts.
{"title":"Dynamic Crushing Behaviors of Cylindrical Lithium-Ion Battery Under Multiple Impacts: An Experimental Study","authors":"Xin-chun Zhang, Nan-nan Liu, Sijie Dong, Zhang Tao, Xiaodi Yin, T. Ci, Hexiang Wu","doi":"10.1115/1.4056885","DOIUrl":"https://doi.org/10.1115/1.4056885","url":null,"abstract":"\u0000 To understand the dynamic failure mechanisms of cylindrical lithium-ion battery (LIB) under different impact loadings, the crushing behaviors of the 18650 LIBs were experimentally investigated in this work. The drop weight impact tests with different impactor heads were conducted to analyze the crushing responses of the LIBs. By changing the state of charge (SOC) of the battery, impactor types and impact energy, the force-electric responses of a LIB under multiple impacts were explored. Macro- and micro- deformation of the batteries were further exployed including SOC dependency and the failure modes of the separator. Results show that except for impact energy, the mechanical responses and failure behaviors of the LIBs under the repeated impacts also depended upon the SOC and impactor shapes. The relationship between impact velocity and minimum impact times was established when a hard internal short circuit (ISC) appeared to evaluate the dynamic safety of the LIBs. These results can provide guidance for the crashworthiness design and safety assessment of the batteries under multiple impacts.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":"1 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63503866","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}
Mechanically stable, proton conducting, and very cost-effective nanocomposite membrane was synthesized successfully using simple and scalable phase-inversion approach. Phosphotungstic acid (PWA) and zirconium phosphate (ZRP) were synthesized using sol-gel and co-precipitation method respectively. PWA-ZrP nanoparticles showed remarkable compatibility with cross-linked poly(vinyl alcohol) (c-PVA) and thus forming uniform and defect-free composite membrane of thickness ~100-120 micron. Doped PWA-ZRP nanoparticles into c-PVA membrane led to introduced bronsted acidic sites and thereby, drastic improvement in proton conductivity of membrane was observed. Composite membrane revealed excellent water-holding capabilities with proton conductivity of 5.2 x10−5 Scm−1 under fully hydrated conditions (i.e. 98% relative humidity). The synthesized proton conducting nanocomposite membrane demonstrated as a potential advanced functional solid electrolyte for possible application in proton exchange membrane fuel cell (PEMFC).
{"title":"Synthesis of Proton Conducting and Highly Stable PWA-ZRP Doped Composite Membrane for PEM Fuel Cell","authors":"Jay Pandey, M. Seepana","doi":"10.1115/1.4056710","DOIUrl":"https://doi.org/10.1115/1.4056710","url":null,"abstract":"\u0000 Mechanically stable, proton conducting, and very cost-effective nanocomposite membrane was synthesized successfully using simple and scalable phase-inversion approach. Phosphotungstic acid (PWA) and zirconium phosphate (ZRP) were synthesized using sol-gel and co-precipitation method respectively. PWA-ZrP nanoparticles showed remarkable compatibility with cross-linked poly(vinyl alcohol) (c-PVA) and thus forming uniform and defect-free composite membrane of thickness ~100-120 micron. Doped PWA-ZRP nanoparticles into c-PVA membrane led to introduced bronsted acidic sites and thereby, drastic improvement in proton conductivity of membrane was observed. Composite membrane revealed excellent water-holding capabilities with proton conductivity of 5.2 x10−5 Scm−1 under fully hydrated conditions (i.e. 98% relative humidity). The synthesized proton conducting nanocomposite membrane demonstrated as a potential advanced functional solid electrolyte for possible application in proton exchange membrane fuel cell (PEMFC).","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48843552","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}
Roslinda Fauzi, R. Daik, Basirah Fauzi, S. N. L. Mamauod
Ionic Liquids (ILs) that are used in the market nowadays have high complexity of processing, high viscosity and high toxicity in comparison to deep eutectic solvent (DES). Deep eutectic solvent is typically used in thermal energy storage, separation and extraction process or electrochemistry field. This study focuses on determining the physicochemical properties of DES, which are thermal conductivity, viscosity, and surface tension. Deep Eutectic Solvent was prepared by mixing hydrogen bond donor (HBD) compounds (ethylene glycol) and hydrogen bond acceptor (HBA) compounds (N,N-Diethylethanolammonium chloride) at different molar compositions. The data shows that the molar ratio HBA:HBD of 1:2 resulted in optimized values of thermal conductivity (0.218 W/mK), low viscosity (38.1 cP) and high surface tension (54 mN/m). Most notably, DES is capable of sustaining in a liquid phase at ambient condition (25°C) for more than 30 days. FTIR spectrum did not indicate any presence of a new peak. This established that only delocalization of ions occurred, and hence chemical transformations did not take place during mixing. The data obtained showed that the new synthesized solvent (DES) possess better result than the ILs. Therefore, DES can be proposed to replace the dependency to ILs.
{"title":"Physicochemical Properties of N,N-Diethylethanolammonium Chloride/Ethylene Glycol based DES for Replacement of Ionic Liquid","authors":"Roslinda Fauzi, R. Daik, Basirah Fauzi, S. N. L. Mamauod","doi":"10.1115/1.4056638","DOIUrl":"https://doi.org/10.1115/1.4056638","url":null,"abstract":"\u0000 Ionic Liquids (ILs) that are used in the market nowadays have high complexity of processing, high viscosity and high toxicity in comparison to deep eutectic solvent (DES). Deep eutectic solvent is typically used in thermal energy storage, separation and extraction process or electrochemistry field. This study focuses on determining the physicochemical properties of DES, which are thermal conductivity, viscosity, and surface tension. Deep Eutectic Solvent was prepared by mixing hydrogen bond donor (HBD) compounds (ethylene glycol) and hydrogen bond acceptor (HBA) compounds (N,N-Diethylethanolammonium chloride) at different molar compositions. The data shows that the molar ratio HBA:HBD of 1:2 resulted in optimized values of thermal conductivity (0.218 W/mK), low viscosity (38.1 cP) and high surface tension (54 mN/m). Most notably, DES is capable of sustaining in a liquid phase at ambient condition (25°C) for more than 30 days. FTIR spectrum did not indicate any presence of a new peak. This established that only delocalization of ions occurred, and hence chemical transformations did not take place during mixing. The data obtained showed that the new synthesized solvent (DES) possess better result than the ILs. Therefore, DES can be proposed to replace the dependency to ILs.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44088274","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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