期刊
CHEMELECTROCHEM
卷 7, 期 3, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201901914
关键词
Li-ion battery; rate performance; low temperature performance; binder-free
Achieving lithium-ion batteries (LIBs) with ultrahigh rate at ambient-temperature and excellent low temperature-tolerant performances is still a tremendous challenge. In this paper, we design a binder-free Li4Ti5O12 (LTO) electrode to achieve an excellent rate performance (similar to 75% of its theoretical capacity at 200C), in which, aligned CNT nanosheets were used to load LTO nanosheets decorated with silver nanocrystals. With combination of 1,3-Dioxlane-based electrolyte, there is nearly no initial voltage drop happen, and the capacity can be greater than 140mAhg(-1) (similar to 85% of its specific capacity at room temperature) at -60 degrees C and 0.2C. This study provides a practical guidance of the design of LIBs with outstanding rate performances and low temperature resistance.
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