LITHIUM-TRANSITION-METAL COMPOSITE OXIDE, TRANSITION METAL HYDROXIDE PRECURSOR, METHOD FOR MANUFACTURING TRANSITION METAL HYDROXIDE PRECURSOR, METHOD FOR MANUFACTURING LITHIUM-TRANSITION-METAL COMPOSITE OXIDE, POSITIVE-ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS-ELECTROLYTE SECONDARY CELL, ELECTRODE FOR NONAQUEOUS-ELECTROLYTE SECONDARY CELL, NONAQUEOUS-ELECTROLYTE SECONDARY CELL, AND POWER STORAGE DEVICE

Title:

Document Type and Number:

WIPO Patent Application WO/2018/012384

Kind Code:

A1

Abstract:

[Problem] To provide a high-density hydroxide precursor, a method for manufacturing a lithium-transition-metal composite oxide using the precursor, a positive-electrode active material having a large discharge capacity per unit volume which uses the composite oxide, an electrode for a nonaqueous-electrolyte secondary cell, and a nonaqueous-electrolyte secondary cell. [Solution] A method for manufacturing a transition metal hydroxide precursor for use in manufacturing a lithium-transition-metal composite oxide, the method comprising adding a solution containing a transition metal (Me) to a reaction tank provided with a water medium in which a complexing agent and a reducing agent are dissolved in advance, and coprecipitating a transition metal hydroxide including Mn and Ni, or Mn, Ni, and Co, the mole ratio Mn/Me thereof being greater than 0.5, and the mole ratio Co/Me thereof being 0.15 or less. A lithium-transition-metal composite oxide having an α-NaFeO2-type crystal structure, the mole ratio Li/Me thereof being greater than 1, the lithium-transition-metal composite oxide having the abovementioned mole ratio of Mn and Co and an X-ray diffraction pattern attributable to R3-m, the ratio (FWHM (003)/FWHM (104)) of the half-value width of the diffraction peak in the (003) plane with respect to the half-value width of the diffraction peak in the (104) plane being 0.72 or less, and the peak differential pore volume calculated by a BJH method from an adsorption isotherm using a nitrogen gas adsorption method being 0.50 mm3/(g∙nm) or less.

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Inventors:

ENDO DAISUKE (JP)
MURAMATSU HIROMASA (JP)

Application Number:

PCT/JP2017/024740

Publication Date:

January 18, 2018

Filing Date:

July 05, 2017

Export Citation:

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Assignee:

GS YUASA INT LTD (JP)

International Classes:

C01G53/00; H01M4/505; H01M4/525

Domestic Patent References:

WO2013047569A1	2013-04-04
WO2012039413A1	2012-03-29

Foreign References:

JP2016017017A

2016-02-01

Other References: