POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, POSITIVE ELECTRODE ACTIVE MATERIAL USED FOR SAME, AND SECONDARY BATTERY USING SAME

Title:

POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, POSITIVE ELECTRODE ACTIVE MATERIAL USED FOR SAME, AND SECONDARY BATTERY USING SAME

Document Type and Number:

WIPO Patent Application WO/2017/154631

Kind Code:

A1

Abstract:

Provided is a positive electrode for nonaqueous electrolyte secondary batteries, which enables a battery to have a higher output power if used as a positive electrode of the battery, and which causes less deterioration in the battery performance. Provided is a positive electrode for nonaqueous electrolyte secondary batteries, which comprises a positive electrode element that is configured from a positive electrode active material composed of a lithium metal composite oxide and an amorphous coating layer that is formed on the surface of the positive electrode element from a compound containing niobium and lithium, and wherein the compound is a lithium ion conductor. Consequently, lithium ion conductivity in the electrode is able to be improved, and deterioration in the lithium ion conductivity and dielectric properties in the atmosphere is able to be suppressed. In addition, a positive electrode for nonaqueous electrolyte secondary batteries, which is able to achieve a higher output power and is not susceptible to deterioration in the high output performance if handled in the atmosphere can be obtained by using the above-described electrode.

Inventors:

KATO MIKAKO (JP)
HAYASHI TETSUTARO (JP)
KURIHARA KOJI (JP)

Application Number:

PCT/JP2017/007377

Publication Date:

September 14, 2017

Filing Date:

February 27, 2017

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)

International Classes:

H01M4/131; H01M4/36; H01M4/62

Domestic Patent References:

WO2011145462A1

2011-11-24

Foreign References:

JP4982866B2	2012-07-25
JP2015179616A	2015-10-08
JP2015053234A	2015-03-19

Other References:

MICHAEL GELLERT ET AL.: "Impedance spectroscopic study of the charge transfer resistance at the interface between a LiNi0.5Mn1.5O4 high-voltage cathode film and a LiNb03 coating film", SOLID STATE IONICS, vol. 287, 10 February 2016 (2016-02-10), pages 8 - 12, XP029445740, [retrieved on 20160210]

Attorney, Agent or Firm:

YAMAUCHI PATENT ATTORNEYS (JP)

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