ORIENTED POSITIVE ELECTRODE PLATE FOR LITHIUM SECONDARY BATTERY

Title:

ORIENTED POSITIVE ELECTRODE PLATE FOR LITHIUM SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/2017/029899

Kind Code:

A1

Abstract:

Provided is an oriented positive electrode plate for a lithium secondary battery, the oriented positive electrode plate comprising a sintered body constituted from a plurality of lithium cobalt oxide crystal grains. In this oriented positive electrode plate, for at least some of the crystal grains, the (003) planes from the layered rock salt structure thereof are oriented in directions that intersect with the plate surface of the oriented positive electrode plate. The ratio RS of the diffraction peak intensity from the (003) planes over the diffraction peak intensity from the (104) planes by x-ray diffraction on a surface of the oriented positive electrode plate is lower than the ratio RI of the diffraction intensity from the (003) planes over the diffraction intensity from the (104) planes by x-ray diffraction on a center position in the plate thickness direction of the oriented positive electrode plate, and the ratio of the surface XRD peak ratio RS over the internal XRD peak ratio RI is 0.5 or lower. This oriented positive electrode plate allows for a suppression of crack development when an external stress is applied, and maintains the ease of lithium ion extraction due to the orientation on the oriented positive electrode plate surface and the resulting high output characteristics.

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WO/2000/044673	METHODS FOR MAKING LITHIUM VANADIUM OXIDE ELECTRODE MATERIALS
WO/2013/004957	ACTIVE SUBSTANCE FOR ELECTRODE FOR A SODIUM ION BATTERY
WO/2019/058702	POSITIVE ELECTRODE FOR SECONDARY BATTERIES, SECONDARY BATTERY, AND METHOD FOR PRODUCING POSITIVE ELECTRODE FOR SECONDARY BATTERIES

Inventors:

OHIRA NAOTO (JP)
YURA YUKINOBU (JP)
YOSHIDA TETSUSHIGE (JP)

Application Number:

PCT/JP2016/069919

Publication Date:

February 23, 2017

Filing Date:

July 05, 2016

Export Citation:

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Assignee:

NGK INSULATORS LTD (JP)

International Classes:

H01M4/131; C01G51/00; C04B35/00; H01M4/525

Foreign References:

JP2012009194A	2012-01-12
JP2016069269A	2016-05-09
JP2015032355A	2015-02-16

Attorney, Agent or Firm:

TAKAMURA Masaharu et al. (JP)

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