Analysis of Capacity Fading Mechanisms of LiFePO4/Graphite Power Battery AITranslate
Abstract AITranslate
LiFePO4/graphite power battery is an important energy storage carrier for electric vehicles,and exploring its capacity fading mechanism is of great significance.The capacity fading characteristics of negative and positive electrodes of four kinds of lithium iron phosphate batteries with different capacity retention rate(100%,80%,70%,60%)were studied.The specific capacity,morphology,phase composition and impedance characteristics of positive and negative electrodes were analyzed by ICP-OES,SEM,XRD and EIS.The results show that the loss of battery capacity caused by the loss of active lithium ions occurs mainly before the capacity retention rate of 80%,and the fading of the dynamic performance of positive and negative electrodes is an important reason for the loss of battery capacity.With the decrease of capacity retention rate,the morphology of positive and negative electrodes deteriorates,the ohmic resistance,membrane resistance and charge transfer resistance significantly increase,which is contributed to difficulty of lithium extraction-insertion and capacity loss of the positive and negative electrodes.
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Basic Information:
DOI：
Chinese Library Classification Number:TM912.9[电气工程—电力电子与电力传动]
Citation Information:
LiFePO4/graphite power battery is an important energy storage carrier for electric vehicles,and exploring its capacity fading mechanism is of great significance.The capacity fading characteristics of negative and positive electrodes of four kinds of lithium iron phosphate batteries with different capacity retention rate(100%,80%,70%,60%)were studied.The specific capacity,morphology,phase composition and impedance characteristics of positive and negative electrodes were analyzed by ICP-OES,SEM,XRD and EIS.The results show that the loss of battery capacity caused by the loss of active lithium ions occurs mainly before the capacity retention rate of 80%,and the fading of the dynamic performance of positive and negative electrodes is an important reason for the loss of battery capacity.With the decrease of capacity retention rate,the morphology of positive and negative electrodes deteriorates,the ohmic resistance,membrane resistance and charge transfer resistance significantly increase,which is contributed to difficulty of lithium extraction-insertion and capacity loss of the positive and negative electrodes.
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| GB/T 7714-2015 | [1] WANG Zhen, LI Jian-ling, WANG Kang-kang, et al. Analysis of Capacity Fading Mechanisms of LiFePO4/Graphite Power Battery[J]. Rare Metals and Cemented Carbides, 2020(3): 60-66. |
| MLA | [1] WANG Zhen, et al., "Analysis of Capacity Fading Mechanisms of LiFePO4/Graphite Power Battery." Rare Metals and Cemented Carbides, no. 3, 2020, pp. 60-66. |
| APA | [1] WANG Zhen, LI Jian-ling, WANG Kang-kang, GAO Fei, & TIAN Bao-gui. (2020). Analysis of Capacity Fading Mechanisms of LiFePO4/Graphite Power Battery. Rare Metals and Cemented Carbides(3), 60-66. |
| IEEE | [1] WANG Zhen, LI Jian-ling, WANG Kang-kang, GAO Fei, and TIAN Bao-gui, "Analysis of Capacity Fading Mechanisms of LiFePO4/Graphite Power Battery," Rare Metals and Cemented Carbides, no. 3, pp. 60-66, 2020. keywords: {power battery;capacity fading;LiFePO4;graphite;capacity retention rate} |