期刊
JOURNAL OF POWER SOURCES
卷 346, 期 -, 页码 128-133出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2017.02.014
关键词
Lithium ion battery; Surface roughening; Long cycle-life; Clad; Current collector; High tensile-strength
A surface-roughened clad (S-clad) current collector significantly extends the cycle-life of the lithium ion negative electrode composed of a silicon micropowder and an aqueous binder. The high tensile strength of the S-clad is also proved to be important for improving the battery performance of the electrode by comparison to a surface-roughened pure Cu current collector. Moreover, adding 10 vol.% fluoroethylene carbonate to the electrolyte further extends the cycle-life of the Si electrode. The synergic effect of the high adhesive and tensile strength of the S-clad current collector as well as the electrolyte additive results in maintaining the reversible capacity of 1000 mA h g(-1) for more than 1000 cycles, in which 1.0 1.2 mg cm(-2) of the active material is loaded on the electrode. (C) 2017 Elsevier B.V. All rights reserved.
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