The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 05, 2013
Filed:
Oct. 31, 2008
Zhonglai Pan, Sichuan, CN;
Zhenghua Deng, Sichuan, CN;
Rengui LI, Sichuan, CN;
LU Wang, Sichuan, CN;
Jiamin Deng, Sichuan, CN;
Hongchang Du, Sichuan, CN;
Jiandong Gao, Sichuan, CN;
Jishuan Suo, Sichuan, CN;
Zhonglai Pan, Sichuan, CN;
Zhenghua Deng, Sichuan, CN;
Rengui Li, Sichuan, CN;
Lu Wang, Sichuan, CN;
Jiamin Deng, Sichuan, CN;
Hongchang Du, Sichuan, CN;
Jiandong Gao, Sichuan, CN;
Jishuan Suo, Sichuan, CN;
Changzhou Zhongke Laifang Power Development Co., Ltd., Changzhou, CN;
Abstract
Provided are separators used in power accumulators such as lithium ion secondary batteries and a preparation method thereof. The said separators are obtained through following steps: providing a polymer colloidal emulsion through a polymerization reaction of polyvinyl alcohol, hydrophobic monomer and hydrophilic monomer in water solution initiated by an initiator; coating a plastic substrate with the said polymer colloidal emulsion using tape-casting method; drying the plastic substrate coated with the polymer colloidal emulsion, and then obtaining the said separators by delaminating them from the substrate. The said separators have good liquid absorbability, high liquid absorption rate and retention, low resistivity, good mechanical strength and good thermal stability (little thermal shrinkage and little size distortion) as well as electrochemical stability. The prepared lithium ion batteries have good cycle stability and long service life.