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1. (WO2014196656) METHOD FOR MANUFACTURING SECONDARY-BATTERY SEPARATOR AND METHOD FOR MANUFACTURING LITHIUM SECONDARY BATTERY

Pub. No.:    WO/2014/196656    International Application No.:    PCT/JP2014/065395
Publication Date: Fri Dec 12 00:59:59 CET 2014 International Filing Date: Thu Jun 05 01:59:59 CEST 2014
IPC: H01M 2/16
Applicants: TOKYO METROPOLITAN UNIVERSITY
公立大学法人首都大学東京
3DOM INC.
株式会社スリーダム
TOKYO OHKA KOGYO CO., LTD.
東京応化工業株式会社
Inventors: KANAMURA, Kiyoshi
金村 聖志
MUNAKATA, Hirokazu
棟方 裕一
IMAZAWA, Kazuhiro
今澤 計博
SAGO, Hiroyoshi
佐合 宏仁
Title: METHOD FOR MANUFACTURING SECONDARY-BATTERY SEPARATOR AND METHOD FOR MANUFACTURING LITHIUM SECONDARY BATTERY
Abstract:
Provided is a method for manufacturing, without using hydrofluoric acid, a secondary-battery separator that comprises a porous resin film in which air holes have a three-dimensional ordered array structure and are in mutual communication via through-holes. This manufacturing method involves the following: a microparticle dispersion slurry in which narrow-dispersion spherical microparticles are uniformly dispersed in a dispersion medium is prepared; the microparticle dispersion slurry is dried to obtain a narrow-dispersion spherical microparticle dispersion film; the film is heat-treated to form a microparticle-resin film in which microparticles are present in a three-dimensional ordered array in a resin matrix; and the microparticle-resin film is brought into contact with an inorganic acid or the like other than hydrofluoric acid to dissolve and remove the microparticles, or the microparticle-resin film is heated to remove the microparticles, to form air holes that are in mutual communication via through-holes and that have a three-dimensional ordered array structure in the resin matrix. The dispersion medium comprises a resin precursor that makes up the resin matrix, and the surface of the narrow-dispersion microparticles is inactive with respect to the dispersion medium.