Journal
JOURNAL OF POWER SOURCES
Volume 270, Issue -, Pages 547-553Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2014.07.142
Keywords
Lithium ion batteries; Separator; Ceramic-coating; Carboxymethyl cellulose (CMC); Styrene-butadiene rubber (SBR)
Funding
- National High-Technology Research and Development Program of China [2012AA110404]
- Fundamental Research Funds for the Central Universities [20720140513]
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In this paper, a new kind of ceramic-coating separator for lithium-ion batteries is successfully prepared by forming a ceramic layer consisted of Al2O3 powder, carboxymethyl cellulose (CMC) and styrene-butadiene rubber (SBR) mix binder onto one side of pristine PE separator. During the preparation of the separator, water is used as solvent and a very small amount of SBR-CMC mixture is applied as binder to obtain better thermal stability. The effect of thickness of the ceramic-coating layer on its thermal stability, physical properties and electrochemical performance is also investigated. The results clearly showed that the ceramic-coating separator with SBR-CMC binder has wonderful thermal stability, good wettability and high uptake of liquid electrolyte. Pouch cell tests with the ceramic-coating separator also show excellent stable cycle performance. (C) 2014 Elsevier B.V. All rights reserved.
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