Title:
POSITIVE ELECTRODE ACTIVE SUBSTANCE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2016/140207
Kind Code:
A1
Abstract:
Provided are: a positive electrode active substance for a non-aqueous electrolyte secondary battery, the positive electrode active substance enabling high capacity and high output when used in a positive electrode material; and a method for producing same. Specifically provided is a method for producing a positive electrode active substance for a non-aqueous electrolyte secondary battery, the method including: a mixing step in which when washing a lithium-metal composite oxide powder which is represented by the general formula LicNi1-x-yCoxMyO2 (here, 0 ≤ x ≤ 0.35, 0 ≤ y ≤ 0.35, 0.97 ≤ c ≤ 1.25, and M is at least one type of element selected from among Mn, V, Mg, Mo, Nb, Ti and Al) and which comprises primary particles and secondary particles constituted by aggregating the primary particles, a tungsten compound powder prepared so as to have a degree of solubility A of 2.0 g/L or less when stirred for 20 minutes in water having a temperature of 25°C and a pH of 12.5 is added, the resultant substance is stirred, and solid-liquid separation is performed so as to obtain a mixture in which the tungsten compound is dispersed;and a heat treatment step in which the mixture is heat treated so as to homogeneously disperse tungsten at the surface of the primary particles and form a compound that contains tungsten and lithium at the surface of the primary particles from the tungsten and the lithium in the mixture.
Inventors:
FURUICHI YUKI (JP)
KOMUKAI TETSUFUMI (JP)
KOMUKAI TETSUFUMI (JP)
Application Number:
PCT/JP2016/056177
Publication Date:
September 09, 2016
Filing Date:
March 01, 2016
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
H01M4/525; C01G53/00; H01M4/36; H01M4/505
Domestic Patent References:
| WO2012105048A1 | 2012-08-09 | |||
| WO2013015069A1 | 2013-01-31 | |||
| WO2015163273A1 | 2015-10-29 |
Foreign References:
| JP2013125732A | 2013-06-24 | |||
| JP2013152866A | 2013-08-08 | |||
| JP2013171785A | 2013-09-02 | |||
| JP2012238581A | 2012-12-06 | |||
| JP2013229339A | 2013-11-07 |
Other References:
See also references of EP 3267517A4
Attorney, Agent or Firm:
OSHIDA Yoshitaka (JP)
Yoshitaka Oshida (JP)
Yoshitaka Oshida (JP)
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