A Polyolefin/Ceramic Composite Membrane for Lithium Ion Batteries

doi:10.3724/SP.J.1095.2014.30445

Chinese Journal of Applied Chemistry

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A Polyolefin/Ceramic Composite Membrane for Lithium Ion Batteries

WANG Hong^1*, YANG Chi¹, XIE Wenfeng², YU Gang³

(1.School of Chemistry and Chemical Engineering,Mianyang Normal University,Mianyang 621000,China;
2.Sichuan Normal University,Chengdu 610066,China;
3.Green Battery Co Ltd. Chongqing,400708,China)

Received:2013-09-03 Revised:2013-11-03 Published:2014-07-10 Online:2014-07-10
Contact: Wang Hong

Abstract

Abstract: A polyolefin/ceramic composite membrane, ZrO2/SiO2/PP（PP:polypropylene）, was prepared as the separator for Li-ion batteries in order to replace the traditional microporous polyolefin membrane. The polyolefin/ceramic composite membrane has high porosity, and can be well wetted by the liquid electrolyte. The ion conductivity of membrane is easily achieved by absorbing the liquid electrolyte due to the high capillary effect. The amphoteric character of ZrO2/SiO2 can scavenge acidic hydrogen fluoride, which is inevitably present in the LiPF6-based electrolytes used currently in the Li-ion batteries. With the polyolefin/ceramic composite membrane as a separator, the graphite/cathode cell exhibits good capacity retention. It is also found that the Li-ion cell fabricated in this manner not only has stable capacity retention, better high temperature performance, but also shows good high-rate performance.

Key words: polyolefin/ceramic composite membrane, Li-ion battery, ion conductivity, cycle life

CLC Number:

O646
TM911.1

WANG Hong1*, YANG Chi1, XIE Wenfeng2, YU Gang3. A Polyolefin/Ceramic Composite Membrane for Lithium Ion Batteries[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30445.

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A Polyolefin/Ceramic Composite Membrane for Lithium Ion Batteries

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