Energy Storage Science and Technology ›› 2016, Vol. 5 ›› Issue (4): 454-461.doi: 10.12028/j.issn.2095-4239.2016.04.007

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The degradation analysis of lithium-ion storage battery with Li4Ti5O12 anode

FEI Hu1, LIN Mingxiang1, LIU Shuguang 2, YAN Xuesheng 2, CHU Yongjin 2, JIN Yi2, YANG Kai 2, HUANG Xuejie 1   

  1. 1Institute of physics, Chinese academy of Sciences, Beijing100190, China; 2China Electric Power Research Institute, Beijing100085, China
  • Received:2016-01-15 Revised:2016-04-06 Online:2016-07-01 Published:2016-07-01

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Abstract:

Li4Ti5O12 as anode material of lithium ion storage battery has an outstanding performance in cycling and safety. With the analysis of SEM, FTIR, XRD and EIS, it was found that the degradation of NCM+LCO/LTO cell cycled at 1C and 2C rate is mainly happened at the cathode side. Because the interface film formed by the reaction of the cathode and electrolyte is unstable, it further consumes lithium ion in latter cycling. Besides, the gases evolved constitutes mainly CO2 and C2H6, indicating that the moisture is strictly controlled in producing process and the electrolyte has been improved with some additives.

Key words: energy storage, Li4Ti5O12, cathode, gassing, degradation