Study on capacity fading of 18650 type LiCoO2-based lithium ion batteries during storage

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• 作者：Liu-Qun Zheng (1)
  Shu-Jun Li (1)
  Deng-Feng Zhang (1)
  Hai-Jun Lin (1)
  Yan-Yue Miao (1)
  Shou-Wei Chen (1)
  Hai-Bin Liu (1)
  
  1. Sinowatt Dongguan Limited ; Dongguan ; 523696 ; China
  
• 关键词：capacity fading ; storage ; 18650 lithium ; ion batteries ; solid electrolyte interface
• 刊名：Russian Journal of Physical Chemistry A, Focus on Chemistry
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：89
• 期：5
• 页码：894-897
• 全文大小：431 KB
• 参考文献：1. Li, Y, Michio, T, Wang, B F (2006) Electrochim. Acta 51: pp. 3228 CrossRef
  2. Tobishima, S, Yamaki, J, Hirai, T (2000) J. Appl. Electrochem. 30: pp. 405 CrossRef
  3. Kim, D S, Lee, C K, Kim, H (2010) Solid State Sci. 12: pp. 45 CrossRef
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  5. Ohzuku, T, Ueda, A, Nagayama, M (1993) Electrochim. Acta 38: pp. 1159 CrossRef
  6. Kwak, G, Park, J, Lee, J (2007) J. Power Sources 174: pp. 484 CrossRef
  7. Osaka, T, Nakade, S, Rajamaki, M (2003) J. Power Sources 119鈥?21: pp. 929 CrossRef
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1531-863X

文摘

The capacity fading of LiCoO2-based lithium ion batteries during storage was studied. The discharging capacity fading is attributed to the decreasing in the charging capacity at the constant current stage. After 300 cycles, the ratio of the charging capacity of batteries at the constant current stage to the total charging capacity decreases from 87.2 to 71.2%. The bounce-back voltage is closely related to the internal resistance when the battery is discharged to the cut-off voltage of 3.0 V. Batteries were disassembled in the fully discharged state, and then a assembled again in order to deeply understand the causes of the capacity fading of the cathode and anode. The results shows that the SEI film thickness increasing, breaking or repairing process at the anode could be responsible for the high bounce-back voltage, the increase of the internal resistance and the capacity fading during storage.