Arama Fatima Zohra, Laribi Slimane, Khaled Mammar, N. Aoun, Ghaitaoui Touhami, H. Messaoud
The identification of water status is the foundation for fuel cell water management, which is helpful to fuel cell reliability and longevity. In this paper, a novel and reliable method for diagnosing the hydration condition of proton exchange membrane fuel cells (PEMFCs) was presented using a fractional-order model (FOM) to represent the PEMFCs impedance. The results show that the mean RMSE and MAPE errors between the proposed model and experimental data (in normal, drying, or flooding cases) are about 0.034 and 0.473, respectively. The fast Fourier transform electrochemical impedance spectroscopy technique (FFT-EIS) was used as an alternative technique that is simple and efficient to electrochemical impedance spectroscopy (EIS). The PEMFCs hydration state is monitored by observing the changing effect of the physical resistor values (membrane resistance, polarization, and diffusion resistances) of the proposed model. These resistors, characterized by their high sensitivity to the drying and flooding of PEMFCs, affect the Nyquist impedance spectra and frequency spectrum amplitudes at low and high frequencies. Based on the obtained results, it is concluded that the proposed strategy can be used to develop new domains in which the PEMFCs hydration states can be properly predicted.
{"title":"Diagnosis of water failures in proton exchange membrane fuel cells via physical parameter resistances of the fractional order model and fast Fourier transform electrochemical impedance spectroscopy","authors":"Arama Fatima Zohra, Laribi Slimane, Khaled Mammar, N. Aoun, Ghaitaoui Touhami, H. Messaoud","doi":"10.1115/1.4055043","DOIUrl":"https://doi.org/10.1115/1.4055043","url":null,"abstract":"\u0000 The identification of water status is the foundation for fuel cell water management, which is helpful to fuel cell reliability and longevity. In this paper, a novel and reliable method for diagnosing the hydration condition of proton exchange membrane fuel cells (PEMFCs) was presented using a fractional-order model (FOM) to represent the PEMFCs impedance. The results show that the mean RMSE and MAPE errors between the proposed model and experimental data (in normal, drying, or flooding cases) are about 0.034 and 0.473, respectively. The fast Fourier transform electrochemical impedance spectroscopy technique (FFT-EIS) was used as an alternative technique that is simple and efficient to electrochemical impedance spectroscopy (EIS). The PEMFCs hydration state is monitored by observing the changing effect of the physical resistor values (membrane resistance, polarization, and diffusion resistances) of the proposed model. These resistors, characterized by their high sensitivity to the drying and flooding of PEMFCs, affect the Nyquist impedance spectra and frequency spectrum amplitudes at low and high frequencies. Based on the obtained results, it is concluded that the proposed strategy can be used to develop new domains in which the PEMFCs hydration states can be properly predicted.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49111341","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}
Jiaxu Cheng, Yanbing Cheng, Si-Quan Jiang, Jing-Ai Qiao, Yan Zhang, Xiaoyuan Zeng, Yingjie Zhang, Zhongren Zhou, Shi-wei He, P. Dong
In this study, molten-salt electrolysis of silica was investigated to identify the role played by electrolytic conditions on the deoxidization depth. Four key conditions that included particle size, electrolytic temperature, working time, and cell voltage were systematically compared using the X-ray diffraction, scanning electron microscopy (SEM), field-emission SEM, transmission electron microscopy, and X-ray photoelectron spectroscopy analyses. The results suggest that prolonging the. Cell voltage is another key factor that determines the reduction process. On the basis of the given current conditions, the order of effect on the experiment is working time, cell voltage, electrolytic temperature, and particle size. The obtained specimen under optimized condition is Si and Fe–Si alloy composite with silicon porous nanosphere and Fe–Si nanoparticles in a structure that is prepared using 100-nm SiO2 nanosphere as a raw material at 800°C for 5 h at a cell voltage of 2.6–2.8 V. The present research provides a promising guidance for practical application using the method of molten-salt electrolysis.
{"title":"Study of influences on the direct electrolysis of silica in molten salt: particle size, temperature, time and voltage","authors":"Jiaxu Cheng, Yanbing Cheng, Si-Quan Jiang, Jing-Ai Qiao, Yan Zhang, Xiaoyuan Zeng, Yingjie Zhang, Zhongren Zhou, Shi-wei He, P. Dong","doi":"10.1115/1.4054954","DOIUrl":"https://doi.org/10.1115/1.4054954","url":null,"abstract":"\u0000 In this study, molten-salt electrolysis of silica was investigated to identify the role played by electrolytic conditions on the deoxidization depth. Four key conditions that included particle size, electrolytic temperature, working time, and cell voltage were systematically compared using the X-ray diffraction, scanning electron microscopy (SEM), field-emission SEM, transmission electron microscopy, and X-ray photoelectron spectroscopy analyses. The results suggest that prolonging the. Cell voltage is another key factor that determines the reduction process. On the basis of the given current conditions, the order of effect on the experiment is working time, cell voltage, electrolytic temperature, and particle size. The obtained specimen under optimized condition is Si and Fe–Si alloy composite with silicon porous nanosphere and Fe–Si nanoparticles in a structure that is prepared using 100-nm SiO2 nanosphere as a raw material at 800°C for 5 h at a cell voltage of 2.6–2.8 V. The present research provides a promising guidance for practical application using the method of molten-salt electrolysis.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48695643","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}
M. Ge, Wenjun Liu, D. Bock, V. De Andrade, H. Yan, Xiaojing Huang, K. Takeuchi, A. Marschilok, E. Takeuchi, Huolin L. Xin, Y. Chu
The detection sensitivity of synchrotron-based X-ray techniques has been largely improved due to the ever-increasing source brightness, which has significantly advanced ex situ and in situ research for energy materials such as lithium-ion batteries. However, the strong beam-material interaction arising from the high beam flux can substantially modify the material structure. The beam-induced parasitic effect inevitably interferes with the intrinsic material property, making the interpretation of the experimental results difficult and requiring comprehensive assessments. Here, we present a quantitative study of the beam effect on an electrode material Ag2VO2PO4 using four different X-ray characterization methods with different radiation dose rates. The material system exhibits interesting and reversible radiation-induced thermal and chemical reactions, further evaluated under electron microscopy to illustrate the underlying mechanism. The work will provide a guideline for using synchrotron X-rays to distinguish the intrinsic behavior from extrinsic structure change of materials induced by X-rays.
{"title":"X-ray induced chemical reaction revealed by in-situ X-ray diffraction and scanning X-ray microscopy in 15 nm resolution","authors":"M. Ge, Wenjun Liu, D. Bock, V. De Andrade, H. Yan, Xiaojing Huang, K. Takeuchi, A. Marschilok, E. Takeuchi, Huolin L. Xin, Y. Chu","doi":"10.1115/1.4054952","DOIUrl":"https://doi.org/10.1115/1.4054952","url":null,"abstract":"\u0000 The detection sensitivity of synchrotron-based X-ray techniques has been largely improved due to the ever-increasing source brightness, which has significantly advanced ex situ and in situ research for energy materials such as lithium-ion batteries. However, the strong beam-material interaction arising from the high beam flux can substantially modify the material structure. The beam-induced parasitic effect inevitably interferes with the intrinsic material property, making the interpretation of the experimental results difficult and requiring comprehensive assessments. Here, we present a quantitative study of the beam effect on an electrode material Ag2VO2PO4 using four different X-ray characterization methods with different radiation dose rates. The material system exhibits interesting and reversible radiation-induced thermal and chemical reactions, further evaluated under electron microscopy to illustrate the underlying mechanism. The work will provide a guideline for using synchrotron X-rays to distinguish the intrinsic behavior from extrinsic structure change of materials induced by X-rays.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46743084","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}
Intercalation materials are promising candidates for reversible energy storage and are, for example, used as lithium-battery electrodes, hydrogen-storage compounds, and electrochromic materials. An important issue preventing the more widespread use of these materials is that they undergo structural transformations (of up to ~10% lattice strains) during intercalation, which expand the material, nucleate microcracks, and, ultimately, lead to material failure. Besides the structural transformation of lattices, the crystallographic texture of the intercalation material plays a key role in governing ion-transport properties, generating phase separation microstructures, and elastically interacting with crystal defects. In this review, I provide an overview of how the structural transformation of lattices, phase transformation microstructures, and crystallographic defects affect the chemo-mechanical properties of intercalation materials. In each section, I identify the key challenges and opportunities to crystallographically design intercalation compounds to improve their properties and lifespans. I predominantly cite examples from the literature of intercalation cathodes used in rechargeable batteries, however, the identified challenges and opportunities are transferable to a broader range of intercalation compounds.
{"title":"Crystallographic Design of Intercalation Materials","authors":"A. Renuka Balakrishna","doi":"10.1115/1.4054858","DOIUrl":"https://doi.org/10.1115/1.4054858","url":null,"abstract":"\u0000 Intercalation materials are promising candidates for reversible energy storage and are, for example, used as lithium-battery electrodes, hydrogen-storage compounds, and electrochromic materials. An important issue preventing the more widespread use of these materials is that they undergo structural transformations (of up to ~10% lattice strains) during intercalation, which expand the material, nucleate microcracks, and, ultimately, lead to material failure. Besides the structural transformation of lattices, the crystallographic texture of the intercalation material plays a key role in governing ion-transport properties, generating phase separation microstructures, and elastically interacting with crystal defects. In this review, I provide an overview of how the structural transformation of lattices, phase transformation microstructures, and crystallographic defects affect the chemo-mechanical properties of intercalation materials. In each section, I identify the key challenges and opportunities to crystallographically design intercalation compounds to improve their properties and lifespans. I predominantly cite examples from the literature of intercalation cathodes used in rechargeable batteries, however, the identified challenges and opportunities are transferable to a broader range of intercalation compounds.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2022-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45048283","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}
Being one of the core power units of electric vehicles, the lithium ion batteries (LIBs) are broadly concerned. However, in the cases of abuses, LIBs may counter thermal runaway, threatening the personal and property safety of users. In order to avoid the occurrence of thermal runaway, the battery thermal management system (BTMS) has been introduced to improve the safety, optimize the efficiency and prolong the service life of lithium ion batteries. In this review, feasible thermal management schemes of LIBs system were summarized chronically, different thermal management schemes were evaluated and case studies were made. The schemes of controlling the internal reaction control in the battery are highlighted as well. This review offers a comprehensive view of BTMS and proposes a promising future for the employment of lithium ion batteries.
{"title":"A Review of Battery Thermal Management Methods for Electric Vehicles","authors":"Yuhang Ding, Yadan Zheng, Songyu Li, Tingyue Dong, Zhenhai Gao, Tianyao Zhang, Weifeng Li, Rao Shun, Xiao Yang, Yupeng Chen, Yajun Zhang","doi":"10.1115/1.4054859","DOIUrl":"https://doi.org/10.1115/1.4054859","url":null,"abstract":"\u0000 Being one of the core power units of electric vehicles, the lithium ion batteries (LIBs) are broadly concerned. However, in the cases of abuses, LIBs may counter thermal runaway, threatening the personal and property safety of users. In order to avoid the occurrence of thermal runaway, the battery thermal management system (BTMS) has been introduced to improve the safety, optimize the efficiency and prolong the service life of lithium ion batteries. In this review, feasible thermal management schemes of LIBs system were summarized chronically, different thermal management schemes were evaluated and case studies were made. The schemes of controlling the internal reaction control in the battery are highlighted as well. This review offers a comprehensive view of BTMS and proposes a promising future for the employment of lithium ion batteries.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2022-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47617024","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}
Mechanical abusive loadings, as an inevitable consequence of road accidents, can damage the embedded energy storage system in an electric vehicle and deform its constitutive parts e.g., the lithium-ion batteries. Therefore, to study the mechanical responses of these batteries and avoid expensive testing equipment and rigorous safety percussions, researchers are propelled toward utilizing numerical models. Computationally cost-efficient homogenized finite element models that represent the whole battery in form of a uniform medium, are the most feasible solution, especially in large-scale battery stacks simulations. Compared to the other form factors of the batteries, prismatic cells have been understudied even though they have higher packaging efficiency, by making optimal use of space. In this paper, a comprehensive homogenization and failure calibration method was developed for these prismatic cells. The homogenization was done through extensive uniaxial components tests of the jellyroll and the shell casing. In addition, biaxial tensile tests and simulations were used to calibrate strain-based failure criteria for the components. The calibrated homogenized model is validated in various punch loading scenarios and used in the characterization of the load-displacement responses and failure modes of the stacked cells configurations. In the stacked simulations, due to the cushion-like behavior of the other cells, the failure happens in higher values of displacement compared to a single cell. However, the normalized intrusion percentages for the battery stacks are lower compared to a single battery cell. This emphasizes the importance of the safety assessment of an electric vehicle based on the failure analysis of the battery stacks rather than a single cell. This goal would be feasible through simulations of only homogenized cell models in the stacked configurations which are elaborated in this paper for prismatic cells.
{"title":"Mechanical Properties of Prismatic Li-ion Batteries-Electrodes, Cells, and Stacks","authors":"E. Sahraei, M. Keshavarzi, Xiaowei Zhang, B. Lai","doi":"10.1115/1.4054823","DOIUrl":"https://doi.org/10.1115/1.4054823","url":null,"abstract":"\u0000 Mechanical abusive loadings, as an inevitable consequence of road accidents, can damage the embedded energy storage system in an electric vehicle and deform its constitutive parts e.g., the lithium-ion batteries. Therefore, to study the mechanical responses of these batteries and avoid expensive testing equipment and rigorous safety percussions, researchers are propelled toward utilizing numerical models. Computationally cost-efficient homogenized finite element models that represent the whole battery in form of a uniform medium, are the most feasible solution, especially in large-scale battery stacks simulations. Compared to the other form factors of the batteries, prismatic cells have been understudied even though they have higher packaging efficiency, by making optimal use of space. In this paper, a comprehensive homogenization and failure calibration method was developed for these prismatic cells. The homogenization was done through extensive uniaxial components tests of the jellyroll and the shell casing. In addition, biaxial tensile tests and simulations were used to calibrate strain-based failure criteria for the components. The calibrated homogenized model is validated in various punch loading scenarios and used in the characterization of the load-displacement responses and failure modes of the stacked cells configurations. In the stacked simulations, due to the cushion-like behavior of the other cells, the failure happens in higher values of displacement compared to a single cell. However, the normalized intrusion percentages for the battery stacks are lower compared to a single battery cell. This emphasizes the importance of the safety assessment of an electric vehicle based on the failure analysis of the battery stacks rather than a single cell. This goal would be feasible through simulations of only homogenized cell models in the stacked configurations which are elaborated in this paper for prismatic cells.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2022-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46159678","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}
Haotian Tan, Y. Li, Tianyu Zhao, Faqiang Wang, Qun-e Zhao, Gang Xie, Xiaohua Yu
Bi is one of important alloying elements in aluminum anode of alkaline battery. In this work, Al-Bi alloy used as anode material.And how to optimize the addition amount of Bi in aluminum anode was studied to improve the discharge performance of aluminum anode. Using 4 mol/L−1 NaOH solution as electrolyte, the electrochemical properties of Aluminum anode Al-xBi (x=0, 0.2, 0.4, 0.6, 0.8, 1.0wt%) with different Bi content were studied. The results show that the addition of Bi will destroy the passivation film on the surface of aluminum alloy, making the reaction further. The addition of Bi element has the effect of refining grain and homogenizing microstructure, and reduces the solution resistance and polarization resistance during discharge to a certain extent. Under the condition of 4 mol/L-1 NaOH solution as the electrolyte, Al-0.8Bi anode plate has better corrosion resistance and electrode activity compatibility.
{"title":"Exploring the influence of bismuth content on the electrochemical performance of aluminum anodes in Aluminum-air battery","authors":"Haotian Tan, Y. Li, Tianyu Zhao, Faqiang Wang, Qun-e Zhao, Gang Xie, Xiaohua Yu","doi":"10.1115/1.4054820","DOIUrl":"https://doi.org/10.1115/1.4054820","url":null,"abstract":"\u0000 Bi is one of important alloying elements in aluminum anode of alkaline battery. In this work, Al-Bi alloy used as anode material.And how to optimize the addition amount of Bi in aluminum anode was studied to improve the discharge performance of aluminum anode. Using 4 mol/L−1 NaOH solution as electrolyte, the electrochemical properties of Aluminum anode Al-xBi (x=0, 0.2, 0.4, 0.6, 0.8, 1.0wt%) with different Bi content were studied. The results show that the addition of Bi will destroy the passivation film on the surface of aluminum alloy, making the reaction further. The addition of Bi element has the effect of refining grain and homogenizing microstructure, and reduces the solution resistance and polarization resistance during discharge to a certain extent. Under the condition of 4 mol/L-1 NaOH solution as the electrolyte, Al-0.8Bi anode plate has better corrosion resistance and electrode activity compatibility.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2022-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43277890","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}
Next generation lithium ion batteries are expected to demonstrate superior energy and power density with longer cycle life for successful electrification of the automobile, aviation, and marine industries. Adoption of lithium metal anodes with solid electrolytes can help to achieve that goal given that the dendrite related issues are solved eventually. Another possibility is to use Ni-rich high capacity NMC cathode materials with liquid and/or solid electrolytes, which presently experiences rapid capacity fade while charged to higher voltages. Several mechanical and chemical degradation mechanisms are active within these NMC based cathode particles. Recent experimental research activities attempted to correlate the mechanical damage with the capacity fade experienced by Ni-rich NMC cathodes. A computational framework is developed in this study capable of quantifying the evolution of inter primary particle and cathode/electrolyte interfacial fracture experienced by the poly and single crystalline NMC cathodes during charge/discharge operation. Influence of mechanical degradation on the overall cell capacity, while operating with liquid and/or solid electrolytes, are successfully characterized. Decreasing the size of the cathode primary particles, or the size of the single crystalline cathodes, can mitigate the overall mechanical degradation, and subsequent capacity fade, experienced by NMC cathodes. The developed theoretical methodology can help the engineers and scientists to better understand the mechanical degradation mechanism prevalent in Ni-rich NMC cathodes and build superior lithium ion based energy storage devices for application in next generation devices.
{"title":"Computational Elucidation of Mechanical Degradation in NMC Cathodes: Impact on Cell Performance","authors":"Pallab Barai","doi":"10.1115/1.4054782","DOIUrl":"https://doi.org/10.1115/1.4054782","url":null,"abstract":"\u0000 Next generation lithium ion batteries are expected to demonstrate superior energy and power density with longer cycle life for successful electrification of the automobile, aviation, and marine industries. Adoption of lithium metal anodes with solid electrolytes can help to achieve that goal given that the dendrite related issues are solved eventually. Another possibility is to use Ni-rich high capacity NMC cathode materials with liquid and/or solid electrolytes, which presently experiences rapid capacity fade while charged to higher voltages. Several mechanical and chemical degradation mechanisms are active within these NMC based cathode particles. Recent experimental research activities attempted to correlate the mechanical damage with the capacity fade experienced by Ni-rich NMC cathodes. A computational framework is developed in this study capable of quantifying the evolution of inter primary particle and cathode/electrolyte interfacial fracture experienced by the poly and single crystalline NMC cathodes during charge/discharge operation. Influence of mechanical degradation on the overall cell capacity, while operating with liquid and/or solid electrolytes, are successfully characterized. Decreasing the size of the cathode primary particles, or the size of the single crystalline cathodes, can mitigate the overall mechanical degradation, and subsequent capacity fade, experienced by NMC cathodes. The developed theoretical methodology can help the engineers and scientists to better understand the mechanical degradation mechanism prevalent in Ni-rich NMC cathodes and build superior lithium ion based energy storage devices for application in next generation devices.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48446867","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 order to study the degradation mechanism of Lithium-ion batteries subjected to vibration aging in actual use and also to achieve capacity estimation and prediction, the following work has been done: First, the road spectra of two commonly seen domestic roads in China are collected in the field and modeled on a six-degree-of-freedom motion platform as the vibration working conditions of the batteries. Secondly, aging cycle experiments were conducted on batteries with different placement directions (X-axis direction, Y-axis direction, and Z-axis direction) under two vibration conditions, and the effects of experimental conditions on the decline results were analyzed. Thirdly, quantification of battery decline patterns to analyze the main causes of battery capacity decline. Then, through further analysis of the two vibration conditions on the lithium battery by in-situ and ex-situ methods as its internal mechanisms. Finally, the quantified results were input into the GAN-LSTM prediction model to predict the capacity, and the errors of 20 predictions are: The average values are 2.8561% for group X, 2.7997% for group Y, 3.0182% for group Z, and 2.9478% for group N, which meet the requirements of battery management system estimation. This paper provides a basis for the study of aging mechanism and capacity estimation of lithium-ion batteries under vibration aging conditions, which helps manufacturers to package batteries more rationally to extend battery life and develop BMS-related strategies.
{"title":"Study on the Capacity Degradation Mechanism and Capacity Predication of Lithium-ion Battery under Different Vibration Conditions in Six Degrees-of-Freedom","authors":"Wenhua Li, Mingze He, Yangyang Wang, Fang Shao","doi":"10.1115/1.4054783","DOIUrl":"https://doi.org/10.1115/1.4054783","url":null,"abstract":"\u0000 In order to study the degradation mechanism of Lithium-ion batteries subjected to vibration aging in actual use and also to achieve capacity estimation and prediction, the following work has been done: First, the road spectra of two commonly seen domestic roads in China are collected in the field and modeled on a six-degree-of-freedom motion platform as the vibration working conditions of the batteries. Secondly, aging cycle experiments were conducted on batteries with different placement directions (X-axis direction, Y-axis direction, and Z-axis direction) under two vibration conditions, and the effects of experimental conditions on the decline results were analyzed. Thirdly, quantification of battery decline patterns to analyze the main causes of battery capacity decline. Then, through further analysis of the two vibration conditions on the lithium battery by in-situ and ex-situ methods as its internal mechanisms. Finally, the quantified results were input into the GAN-LSTM prediction model to predict the capacity, and the errors of 20 predictions are: The average values are 2.8561% for group X, 2.7997% for group Y, 3.0182% for group Z, and 2.9478% for group N, which meet the requirements of battery management system estimation. This paper provides a basis for the study of aging mechanism and capacity estimation of lithium-ion batteries under vibration aging conditions, which helps manufacturers to package batteries more rationally to extend battery life and develop BMS-related strategies.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47927535","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}
Hongying Hou, Li Junkai, Jian Lan, Kun Meng, Baoxiang Huang, Hao Li
Graphene nanosheets are produced in mass by Hummers method, accompanied with the emission of waste acid effluent with Mn2+, which should be reasonably recycled. Herein, Mn2+ was extracted into Mn3O4 nanoparticles by oxidation precipitation. Desirably, Mn3O4 powders were the spinel crystal phase and the particle size was 100-150 nm. The reversible discharge capacities of Mn3O4 anode maintained 528 mAh/g at 0.5 A/g for 100 cycles and 423 mAh/g at 1.0 A/g for 300 cycles, with high capacity retention ratios of 93.4 % and 91.1 %, respectively. Obviously, this work may promote the development of the circular economy.
{"title":"Efficient extraction of Mn2+ ions from the waste produced in the Hummers method for application in Li-ion batteries","authors":"Hongying Hou, Li Junkai, Jian Lan, Kun Meng, Baoxiang Huang, Hao Li","doi":"10.1115/1.4054780","DOIUrl":"https://doi.org/10.1115/1.4054780","url":null,"abstract":"\u0000 Graphene nanosheets are produced in mass by Hummers method, accompanied with the emission of waste acid effluent with Mn2+, which should be reasonably recycled. Herein, Mn2+ was extracted into Mn3O4 nanoparticles by oxidation precipitation. Desirably, Mn3O4 powders were the spinel crystal phase and the particle size was 100-150 nm. The reversible discharge capacities of Mn3O4 anode maintained 528 mAh/g at 0.5 A/g for 100 cycles and 423 mAh/g at 1.0 A/g for 300 cycles, with high capacity retention ratios of 93.4 % and 91.1 %, respectively. Obviously, this work may promote the development of the circular economy.","PeriodicalId":15579,"journal":{"name":"Journal of Electrochemical Energy Conversion and Storage","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44841696","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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