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Title:
ANODE ACTIVE MATERIAL, PREPARATION METHOD THEREFOR, AND NONAQUEOUS LITHIUM SECONDARY BATTERY COMPRISING SAME ANODE ACTIVE MATERIAL, AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/098660
Kind Code:
A3
Abstract:
The present invention relates to an anode active material, a nonaqueous lithium secondary battery comprising the same, and a preparation method therefor, and the purpose of the present invention is to improve high-rate charging characteristics without deterioration of charging and discharging efficiency and lifetime characteristics when applying an amorphous carbon coating layer as the anode active material of the nonaqueous lithium secondary battery, wherein the amorphous carbon coating layer comprising MoPx particles, consisting of MoP and MoP2, is formed on the surface of a carbon-based material, thereby reducing resistance when inserting lithium ions in the surface of the carbon-based material, and improving reactivity and structural stability of the surface. The anode active material according to the present invention comprises a carbon-based material, and an amorphous carbon coating layer comprising MoPx particles, consisting of MoP and MoP2, formed on the surface of the carbon-based material. The coating layer can be applied to the surface of the carbon-based material through a heat treatment of coal tar pitch in which the MoPx particles, consisting of MoP and MoP2, are dispersed.

Inventors:
LEE, Sang Min (#205, 5 Seokdong-ro 67beon-gil, Jinhae-gu,Changwon-si, Gyeongsangnam-do, 51587, KR)
PARK, Min Sik (#101-502, 239 Youngtong-ro 200beon-gil, Youngtong-gu,Suwon-si, Gyeonggi-do, 16695, KR)
PARK, Gum Jae (#410-1004, 257 Naengcheon-ro, Jinhae-gu,Changwon-si, Gyeongsangnam-do, 61951, KR)
LIM, Ha Young (#2602-1403, 84 Jomaru-ro,Bucheon-si, Gyeonggi-do, 14590, KR)
CHOI, Jeong Hee (#101-501, 80 Sesil-ro,Haeundae-gu, Busan, 48107, KR)
Application Number:
KR2018/013867
Publication Date:
July 11, 2019
Filing Date:
November 14, 2018
Export Citation:
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Assignee:
KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE (12 Bulmosan-ro 10beon-gil, Seongsan-guChangwon-si, Gyeongsangnam-do, 51543, KR)
UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY (1732, Deogyoung-daero Giheung-gu,Yongin-si, Gyeonggi-do, 17104, KR)
International Classes:
H01M4/36; C01B25/08; C01B32/05; C01B32/21; H01M4/587; H01M4/62; H01M10/0525
Attorney, Agent or Firm:
HMP IP GROUP (5F. 120, Yeoksam-ro,Gangnam-gu, Seoul, 06251, KR)
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