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1. (WO2010116533) LITHIUM ION BATTERY AND UTILIZATION THEREOF

Pub. No.:    WO/2010/116533    International Application No.:    PCT/JP2009/057398
Publication Date: Fri Oct 15 01:59:59 CEST 2010 International Filing Date: Sat Apr 11 01:59:59 CEST 2009
IPC: H01M 10/40
Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA
トヨタ自動車株式会社
MORISHIMA, Ryuta
森島 龍太
Inventors: MORISHIMA, Ryuta
森島 龍太
Title: LITHIUM ION BATTERY AND UTILIZATION THEREOF
Abstract:
Disclosed is a lithium ion battery equipped with an electrode body (30), which is constructed by laminating and rolling cathode sheets (32) and anode sheets (34), which are in the form of long sheets, with intervening separators (35). The anode sheets (34) are each provided with an active material layer (344) in which one edge, in the length direction, of a collector (342) is left in the form of a strip. The aforementioned strip-like portion (342a) juts out from the cathode sheet (32). A porous inorganic layer (346) is formed on the outer surface of the anode active material layer (344) from a flat part (344a), wrapping around the edge (344b), and extending to the surface of the collector (342). The porosity (Pa) at the edge (344b) of the inorganic layer (346) is lower than the porosity (Pb) at the flat part (344a) thereof.