A study on capacity and power fading characteristics of Li(Ni1/3Co1/3Mn1/3)O2-based lithium-ion batteries
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- 作者：Xiaokang Li ; Jianqiang Kang ; Yifu Yang ; Fuwu Yan ; Changqing Du ; Maji Luo
- 关键词：Capacity fade ; Incremental capacity analysis ; Incremental polarization resistance ; Electrodes fade ; Cycle life prediction
- 刊名：Ionics
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：22
- 期：11
- 页码：2027-2036
- 全文大小：1,572 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Electrochemistry
Materials Science
Physical Chemistry
Condensed Matter
Renewable Energy Sources
Electrical Power Generation and Transmission - 出版者：Springer Berlin / Heidelberg
- ISSN：1862-0760
- 卷排序：22
文摘
The objective of this study is to find out the factor that accounts for the capacity fading and to predict the cycle life of lithium-ion batteries by the driving cycle test. A new method, incremental polarization resistance, is elected to analyze the gradation mechanism based on incremental capacity analysis. It is summarized that the two major factors, the loss of lithium ions and the cathode fading, make the capacity loss in different stages. In the first stage, the loss of lithium ions, caused by the solid electrolyte interface (SEI) lay reaction, is the main reason for battery degradation. In the second stage, the cathode starts to decay and make the capacity loss, because of the less intercalation in cathode. In the third stage, the cathode degradation gradually outpaces the loss of Li and becomes the limit factor for the battery recession. Finally, a cycle life model was established to predict the capacity loss with cycle numbers.