Title:
POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, PREPARATION METHOD FOR SAME, AND LITHIUM SECONDARY BATTERY COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2016/053056
Kind Code:
A1
Abstract:
The present invention relates to a positive electrode active material for a lithium secondary battery, a preparation method for same, and a lithium secondary battery comprising same, the positive electrode active material comprising: lithium cobalt oxide particles; and a surface treatment layer positioned on the surface of the lithium cobalt oxide particles. The lithium cobalt oxide particles comprise on the surface thereof lithium cobalt oxide, with lithium deficiency, having Li/Co of which the mole ratio is less than 1, belonging to a space group of Fd-3m and having a cubic crystal structure. The surface treatment layer comprises a lithium compound comprising transition metal and one or more elements selected from the group consisting of elements of group 13. Therefore, a side reaction with an electrolyte solution is prevented, a high capacity as well as improved rate properties and initial capacity are shown due to high packing density, and excellent output properties and life are shown due to excellent lithium conductivity.
Inventors:
KANG MIN SUK (KR)
JO CHI HO (KR)
RYU JI HOON (KR)
SHIN SUN SIK (KR)
JUNG WANG MO (KR)
JO CHI HO (KR)
RYU JI HOON (KR)
SHIN SUN SIK (KR)
JUNG WANG MO (KR)
Application Number:
PCT/KR2015/010456
Publication Date:
April 07, 2016
Filing Date:
October 02, 2015
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
H01M4/525; C01G51/00; H01M4/505; H01M10/052
Foreign References:
| KR20140067508A | 2014-06-05 | |||
| JP2003217586A | 2003-07-31 |
Other References:
GUMMOW, R. J. ET AL.: "Spinel versus layered structures for lithium cobalt oxide synthesised at 400 °C", MATERIALS RESEARCH BULLETIN, vol. 28, no. 3, 1993, pages 235 - 246, XP055372332, DOI: doi:10.1016/0025-5408(93)90157-9
CHOI, S. ET AL.: "Chemical synthesis and properties of spinel Li1-xCo2O4-delta", JOURNAL OF SOLID STATE CHEMISTRY, vol. 164, no. 2, 2002, pages 332 - 338, XP055130676, DOI: doi:10.1006/jssc.2001.9480
VAN DER VEN, A. ET AL.: "Electrochemical properties of spinel LixCoO2: A first- principles investigation", PHYSICAL REVIEW B, vol. 59, no. 2, 1999, pages 742 - 749, XP055372336
CHOI, S. ET AL.: "Chemical synthesis and properties of spinel Li1-xCo2O4-delta", JOURNAL OF SOLID STATE CHEMISTRY, vol. 164, no. 2, 2002, pages 332 - 338, XP055130676, DOI: doi:10.1006/jssc.2001.9480
VAN DER VEN, A. ET AL.: "Electrochemical properties of spinel LixCoO2: A first- principles investigation", PHYSICAL REVIEW B, vol. 59, no. 2, 1999, pages 742 - 749, XP055372336
Attorney, Agent or Firm:
BAE, KIM & LEE IP GROUP (KR)
특허법인 태평양 (KR)
특허법인 태평양 (KR)
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