NEGATIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERY AND MANUFACTURING METHOD THEREFOR

WIPO Patent Application WO/2018/159870

A1

Provided is a negative electrode active material for a second battery capable of providing high-capacitance and high-efficiency charge and discharge characteristics. The negative electrode active material comprises a negative electrode active material powder and a coating material layer surrounding a surface of the negative electrode active material powder. The negative electrode active material powder comprises: a silicon single phase; and a silicon-metal alloy phase surrounding the silicon single phase while forming an interface with the silicon single phase. The negative electrode active material contains 60-90 at% of silicon, 3-20 at% of iron, 0-5 at% of a first additive element, and 5-20 at% of carbon, wherein the first additive element is at least one selected from the group consisting of boron (B), magnesium (Mg), aluminum (Al), manganese (Mn), cobalt (Co), chromium (Cr), tin (Sn), molybdenum (Mo), niobium (Nb), phosphorus (P), titanium (Ti), nickel (Ni), copper (Cu), zirconium (Zr), and zinc (Zn), and wherein the coating material layer contains carbon.

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HONG SOON HO (KR)

PCT/KR2017/002237

September 07, 2018

March 02, 2017

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MK ELECTRON CO LTD (KR)

H01M4/36; C01B33/02; C22C1/10; C22C33/02; H01M4/38

KR20160076950A	2016-07-01
KR20160059740A	2016-05-27
KR20100014993A	2010-02-12
KR20150110171A	2015-10-02
JP2005011699A	2005-01-13

Y.P.LEE, MOCK & PARTNERS (KR)

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