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Title:
LITHIUM SODIUM COMPLEX OXIDE, METHOD FOR MANUFACTURING LITHIUM SODIUM COMPLEX OXIDE, CATHODE ACTIVE MATERIAL FOR SECONDARY BATTERY AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2016/080471
Kind Code:
A1
Abstract:
Provided is a lithium sodium complex oxide that has a high energy density (high capacity and high voltage), and that is an important cathode active material for secondary batteries in which sudden voltage drops when discharging are suppressed. Also provided are: a method for manufacturing the lithium sodium complex oxide; a cathode active material for secondary batteries having the lithium sodium complex oxide as a main component; and a secondary battery using the lithium sodium complex oxide as a cathode active material. The lithium sodium complex oxide of the present invention is represented by the formula (LixNawHv)NiyMn1-yO2-z (wherein 0 ≤ v < 0.5; 0 < w < 1.0; 0 < x < 1.0; 0 < x + v + w < 1.0; 0.2 ≤ y ≤ 0.5; 0 ≤ z < 0.13). The crystal structure comprises a lamellar structure of a coordination polyhedron wherein six oxygens are coordinated with sodium, a lamellar structure of a coordination polyhedron wherein six oxygens are coordinated with lithium, a spinel structure wherein four oxygens are coordinated with lithium, and at least one structure selected from the group comprising spinel structures wherein four oxygens are coordinated with lithium.

Inventors:
SHIKANO MASAHIRO (JP)
SAKAEBE HIKARI (JP)
CHIBA KAZUKI (JP)
Application Number:
PCT/JP2015/082469
Publication Date:
May 26, 2016
Filing Date:
November 18, 2015
Export Citation:
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Assignee:
NAT INST OF ADVANCED IND SCIEN (JP)
International Classes:
C01G53/00; H01M4/505; H01M4/525
Domestic Patent References:
WO2009139157A12009-11-19
Foreign References:
JP2004323331A2004-11-18
Other References:
DOLLE, M.: "Investigation of layered intergrowth LixMyMn1-yO2+z (M=Ni, Co, Al) compounds as positive electrodes for Li-ion batteries", SOLID STATE IONICS, vol. 175, no. 1-4, 2004, pages 225 - 228, XP004667571, DOI: doi:10.1016/j.ssi.2003.11.032
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