期刊
JOURNAL OF APPLIED ELECTROCHEMISTRY
卷 42, 期 12, 页码 989-995出版社
SPRINGER
DOI: 10.1007/s10800-012-0442-0
关键词
Lithium ion battery; Li4Ti5O12 anode; Battery inflation; Hybrid electric vehicle
资金
- Amperex Technology Limited Co. (ATL)
- Ningbo Key Innovation Team [2011B82005]
- Ningbo Institute of Material Technology and Engineering, the Chinese Academy of Science
Carbon-coated nano-Li4Ti5O12 (LTO) anode material was prepared and evaluated with 5.5 Ah pouch cells, paired with LiNi1/3Co1/3Mn1/3O2 cathode for potential hybrid electric vehicle (HEV) application. The as-prepared LTO batteries showed excellent electrochemical performance. They delivered a peak discharge power density of ca. 2,800 W kg(-1), and featured a high power (94 and 92 % of discharge and charge capacity at 20 C, respectively) and a prolonged cycle life (89 % capacity retention after 5,000 cycles at 10 C charge and discharge rate). However, the severe capacity decay was observed at elevated temperatures because of loose (worse) interfaces caused by gas generation. It was found that H-2 was the dominant gas component, and the inflation rate had an Arrhenius-type correlation with storage temperature. The battery inflation, arising from side reactions between electrolyte and LTO anode, is the major technical barrier for practical application of the LTO batteries in HEV.
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