ELECTRODE FOR SECONDARY BATTERY AND SECONDARY BATTERY

WIPO Patent Application WO/2020/054615

A1

The purpose of the present invention is to obtain an electrode for a secondary battery with which can be realized a secondary battery that has high output and long life with a small quantity of a conduction aid. The present invention is an electrode for a secondary battery, comprising a combination layer that includes graphene and secondary battery active material particles that include at least lithium and nickel, wherein the average aspect ratio of a conductive material portion in a cross-section of the electrode for the secondary cell identified by the method below is at least 2.0. The method for identifying conductive material portion comprises: (1) obtaining spreading resistance values of the combination layer portion by a scanning spreading resistance microscope method; (2) setting the total data count of the spreading resistance values as N and rearranging the spreading resistance values in order from smallest to largest, setting the 0.1N-th (rounding off decimals of 0.1N) as R and performing binarization processing on two-dimensional data of the spreading resistance values using 0.7R as a threshold, and obtaining a binarized image the portion of which having resistance values of 0.7R or less is identified as the conductive material portion.

KONISHI TAKASHI (JP)
TAMAKI EIICHIRO (JP)

PCT/JP2019/035201

March 19, 2020

September 06, 2019

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TORAY INDUSTRIES (JP)

H01M4/131; H01M4/525; H01M4/62

WO2017061323A1	2017-04-13
WO2017047523A1	2017-03-23
WO2016050895A1	2016-04-07

JP2017218373A	2017-12-14
JP2015215947A	2015-12-03
JP2012014838A	2012-01-19
JP2015215947A	2015-12-03
JP2018160418A	2018-10-11

See also references of EP 3852168A4

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