1. Enhanced electrochemical performance of SrF2-modified Li4Ti5O12 composite anode materials for lithium-ion batteries.
- Author
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Li, Xing, Zhao, Xing, Huang, Peng-xiao, Wang, Ming-shan, Huang, Yun, Zhou, Ying, Lin, Yuan-hua, Qu, Mei-zhen, and Yu, Zuo-long
- Subjects
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LITHIUM-ion batteries , *STRONTIUM compounds , *ELECTROCHEMICAL analysis , *COMPOSITE materials , *ANODES , *COPRECIPITATION (Chemistry) , *LOW temperatures - Abstract
The commercial Li 4 Ti 5 O 12 (LTO) is successfully modified by SrF 2 via a low temperature coprecipitation process. The results indicate that Sr 2+ and F − do not co-dope into the bulk phase of the LTO, but instead form a SrF 2 coating layer on the surface of the LTO. The suitable SrF 2 buffer layer could cover the catalytic active sites of the LTO and suppress the electrolyte reduction decomposition on the surface of the LTO, which means that the SrF 2 modification is favorable to suppress gas generation of the LIBs using LTO as anode material during charge/discharge cycles and storage. Moreover, according to optimized the amount of SrF 2 , the 2 wt% of SrF 2 in the SrF 2 modified LTO composites exhibits the best rate capability and an excellent cyclic performance. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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