SECONDARY BATTERY POSITIVE ELECTRODE ACTIVE MATERIAL AND SECONDARY BATTERY USING THE SAME

WIPO Patent Application WO/2012/014846

A1

Disclosed is a lithium ion secondary battery positive electrode active material using low-cost materials which makes it possible to realize high operating voltages and high capacities while suppressing decreases in capacity caused by cycling. The disclosed secondary battery positive electrode active material is a lithium-manganese composite oxide represented by the general formula (I). Lia(MxMn2-x-yYy) (O4-wZw) (I) (in the formula (I), 0.5 ≦ x ≦ 1.2, 0 < y ≦ 0.3, 0 ≦ a ≦ 1.2, and 0 < w ≦ 1. M includes at least Fe, and in addition to Fe, may further include at least one member selected from the group consisting of Ni, Cu and Cr. Y is at least one member selected from the group consisting of Li, Be, B, Na, Mg, Al, K, Ca, Ti and Si. Z is F and/or Cl.)

UEHARA, Makiko (1120, Shimokuzawa, Chuo-ku, Sagamihara-sh, Kanagawa 98, 〒2525298, JP)
上原　牧子 (〒98 神奈川県相模原市中央区下九沢１１２０番地　ＮＥＣエナジーデバイス株式会社内 Kanagawa, 〒2525298, JP)

JP2011/066864

February 02, 2012

July 25, 2011

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NEC ENERGY DEVICES, LTD. (1120, Shimokuzawa Chuo-ku, Sagamihara-sh, Kanagawa 98, 〒2525298, JP)
ＮＥＣエナジーデバイス株式会社 (〒98 神奈川県相模原市中央区下九沢１１２０番地 Kanagawa, 〒2525298, JP)
UEHARA, Makiko (1120, Shimokuzawa, Chuo-ku, Sagamihara-sh, Kanagawa 98, 〒2525298, JP)

H01M4/505; H01M4/525; H01M10/052; H01M10/0566

MIYAZAKI, Teruo et al. (8th Floor, 16th Kowa Bldg. 9-20, Akasaka 1-chome, Minato-k, Tokyo 52, 〒1070052, JP)

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