Title:
PROCESS FOR PRODUCTION OF POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, POSITIVE ELECTRODE ACTIVE MATERIAL, AND LITHIUM SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2010/018862
Kind Code:
A1
Abstract:
A process for the production of a positive electrode active material capable of bringing about, when used as a positive electrode, a lithium secondary battery which is stable for a long period and which exhibits improved charge and discharge characteristics. The process can dispense with the step of firing a precursor prepared by subjecting various metal salts to liquid- or solid-phase reaction, said metal salts being starting materials necessary for producing a positive electrode active material which consists of a positive electrode material containing different kinds of divalent metals as the constituents. Thus, the process makes it possible to produce a positive electrode active material by simple synthesis, and the process can give a positive electrode active material powder having a larger particle diameter than that of a conventional positive electrode active material powder. The process comprises mixing together multiple kinds of olivine-type lithium M phosphate powders different in the kind of M (M is divalent metal), sintering the obtained mixed powder either in an inert atmosphere or in a vacuum to conduct solution treatment and thus synthesize a positive electrode material which consists of a single compound containing the multiple kinds of divalent metals as constituents, and then pulverizing the positive electrode material into a powder having a mean particle diameter of 1 μm or above.
Inventors:
ABE, Hidetoshi (The Furukawa Battery Co. Ltd., 23-6, Kuidesaku, Jobanshimofunao-machi, Iwaki-sh, Fukushima 01, 〒9728501, JP)
阿部英俊 (〒01 福島県いわき市常磐下船尾町杭出作２３－６古河電池株式会社 いわき事業所内 Fukushima, 〒9728501, JP)
SUZUKI, Tomonori (The Furukawa Battery Co. Ltd., 23-6, Kuidesaku, Jobanshimofunao-machi, Iwaki-sh, Fukushima 01, 〒9728501, JP)
鈴木智統 (〒01 福島県いわき市常磐下船尾町杭出作２３－６古河電池株式会社 いわき事業所内 Fukushima, 〒9728501, JP)
阿部英俊 (〒01 福島県いわき市常磐下船尾町杭出作２３－６古河電池株式会社 いわき事業所内 Fukushima, 〒9728501, JP)
SUZUKI, Tomonori (The Furukawa Battery Co. Ltd., 23-6, Kuidesaku, Jobanshimofunao-machi, Iwaki-sh, Fukushima 01, 〒9728501, JP)
鈴木智統 (〒01 福島県いわき市常磐下船尾町杭出作２３－６古河電池株式会社 いわき事業所内 Fukushima, 〒9728501, JP)
Application Number:
JP2009/064328
Publication Date:
February 18, 2010
Filing Date:
August 07, 2009
Export Citation:
Assignee:
THE FURUKAWA BATTERY CO., LTD. (2-4-1, Hoshikawa Hodogaya-ku, Yokohama-sh, Kanagawa 06, 〒2400006, JP)
古河電池株式会社 (〒06 神奈川県横浜市保土ヶ谷区星川２－４－１ Kanagawa, 〒2400006, JP)
TOKYO METROPOLITAN UNIVERSITY (2-8-1, Nishi-Shinjuku Shinjuku-k, Tokyo 01, 〒1638001, JP)
公立大学法人首都大学東京 (〒01 東京都新宿区西新宿２－８－１ Tokyo, 〒1638001, JP)
SUMITOMO OSAKA CEMENT CO., LTD. (6-28, Rokuban-cho Chiyoda-k, Tokyo 65, 〒1028465, JP)
住友大阪セメント株式会社 (〒65 東京都千代田区六番町６番地２８ Tokyo, 〒1028465, JP)
ABE, Hidetoshi (The Furukawa Battery Co. Ltd., 23-6, Kuidesaku, Jobanshimofunao-machi, Iwaki-sh, Fukushima 01, 〒9728501, JP)
古河電池株式会社 (〒06 神奈川県横浜市保土ヶ谷区星川２－４－１ Kanagawa, 〒2400006, JP)
TOKYO METROPOLITAN UNIVERSITY (2-8-1, Nishi-Shinjuku Shinjuku-k, Tokyo 01, 〒1638001, JP)
公立大学法人首都大学東京 (〒01 東京都新宿区西新宿２－８－１ Tokyo, 〒1638001, JP)
SUMITOMO OSAKA CEMENT CO., LTD. (6-28, Rokuban-cho Chiyoda-k, Tokyo 65, 〒1028465, JP)
住友大阪セメント株式会社 (〒65 東京都千代田区六番町６番地２８ Tokyo, 〒1028465, JP)
ABE, Hidetoshi (The Furukawa Battery Co. Ltd., 23-6, Kuidesaku, Jobanshimofunao-machi, Iwaki-sh, Fukushima 01, 〒9728501, JP)
International Classes:
H01M4/58; C01B25/45; H01M4/36
Attorney, Agent or Firm:
KITAMURA, Kazuo (Rushieru Yushima, 1-2-201 Yushima 3-chome, Bunkyo-k, Tokyo 34, 〒1130034, JP)