| 石墨形貌对锂离子电池倍率性能的影响 |
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| 引用本文： | 容亮斌,张国恒,李展江,朱丹.石墨形貌对锂离子电池倍率性能的影响[J].电池,2018(2):113-116. |
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| 作者姓名： | 容亮斌 张国恒 李展江 朱丹 |
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| 作者单位： | 深圳市沃特玛电池有限公司,广东深圳,518118
湛江出入境检验检疫局,广东湛江,524200 |
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| 摘 要： | 选取了4类不同形貌的人造石墨样品作为锂离子动力电池的负极材料,结合XRD、SEM等手段对石墨的结构、形貌和物理性能进行分析,并组装圆柱形磷酸铁锂(LiFePO_4)动力锂离子电池进行电化学性能测试,综合考察石墨形貌对动力电池倍率性能的影响。采用二次造粒型石墨负极的LiFePO_4电池表现出较好的倍率和循环性能,6C倍率放电保持率达105.9%,6C放电温升32℃,6C循环200次,容量保持率91.06%。
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| 关 键 词： | 动力电池 磷酸铁锂(LiFePO4) 石墨 形貌 倍率性能 power battery lithium iron phosphate(LiFePO4) graphite morphology rate performance |
Impacts of graphite morphology on rate performance of Li-ion battery |
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| RONG Liang-bin,ZHANG Guo-heng,LI Zhan-jiang,ZHU Dan.Impacts of graphite morphology on rate performance of Li-ion battery[J].Battery Bimonthly,2018(2):113-116. |
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| Authors: | RONG Liang-bin ZHANG Guo-heng LI Zhan-jiang ZHU Dan |
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| Abstract: | Four types of artificial graphite samples with different morphology were utilized as negative electrode materials for Li-ion batteries.Crystalline structure,morphology and physical properties of graphite samples were characterized by XRD,SEM and other instruments.The Electrochemical performance of cylindrical lithium iron phosphate(LiFePO4) power Li-ion battery was tested.The influence of morphology of graphite on power battery rate performance was investigated.LiFePO4/graphite with secondary granulation structure batteries exhibited better performance in rate and cycle tests.Capacity retention and temperature elevation at 6 C high-rate were 105.9％ and 32 ℃,capacity retention was 91.06％ after 200 cycles at 6 C rate. |
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