LITHIUM-ION BATTERY SEPARATOR AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2017/124715

A1

The present invention provides a lithium-ion battery separator and a preparation method therefor. The separator comprises an organic polymer the mass fraction of which ranges from 0.2% to 1%, and an inorganic material, and the thickness of the separator ranges 15 μm to 60 μm. The preparation method comprises the following steps: 1) preparing a coating material: dissolving an organic polymer and an inorganic material into a solvent to prepare a slurry coating material; 2) performing coating and drying: coating the slurry prepared in step 1) to the surface of a polar plate of a battery by the thickness of 10 μm to 20 μm, and carrying out drying for 8 h to 12 h at the temperature 30ºC to 50ºC and at the temperature of 50ºC to 80ºC ;3) repeating step 2) one to three times; and 4) performing vacuum drying on the polar plate of the battery obtained in step 3) for 5 h to 10 h at the temperature of 70ºC. The Lithium-ion battery separator in the present invention has a higher charge and discharge capacity and a better cycle performance, has a simple preparation method and low costs, and can be used in mass industrial production.

LIN YUESHENG (CN)
MI WANLIANG (CN)
JIN YI (CN)
WANG SUIJUN (CN)
FU KAI (CN)
LIU SHUGUANG (CN)
YAN XUESHENG (CN)
CHU YONGJIN (CN)
ZHAO LUXING (CN)

PCT/CN2016/090791

July 27, 2017

July 21, 2016

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CHINA ELECTRIC POWER RES INST (CN)
ARIZONA STATE UNIV (US)
STATE GRID CORP CHINA (CN)
NORTH CHINA BRANCH OF STATE GRID CORP OF CHINA (CN)

H01M4/1391; H01M50/403; H01M50/446

CN101385164A	2009-03-11
CN101326658A	2008-12-17

AMBOYNA INTELLECTUAL PROPERTY AGENT CO.,LTD. (CN)

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