Title:
CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING SAME, AND LITHIUM SECONDARY BATTERY INCLUDING SAME
Document Type and Number:
WIPO Patent Application WO/2016/108382
Kind Code:
A1
Abstract:
The present invention relates to a cathode active material for a lithium secondary battery wherein the cathode active material comprises a nickel-based lithium transition metal oxide having a layered structure represented by the formula LiaNibCocMndO2 (wherein 1 < a < 1.14, b > c, b > d, 0.4 ≤ b ≤ 0.9, 0 < c < 0.4, and 0 ≤ d < 0.4), and wherein the highest peak among the peaks presented within a scattering angle 2θ ranging from 20° to 25° is shown between 21.8° and 22.5° when measured using X-ray diffraction analysis; a method for preparing the same; and a lithium secondary battery including the same. According to the present invention, the mobility of a lithium-adjacent nickel within a nickel-based lithium transition metal oxide is reduced, thereby inhibiting the generation of nickel oxide related heterogeneous phase which can degrade the performance of an active material, and as a result, the present invention can provide a lithium secondary battery which exhibits excellent initial efficiency, capacity and life characteristics.
Inventors:
KIM JONG MIN (KR)
CHANG DONG GYU (KR)
KIM JI YOON (KR)
LEE MI SUN (KR)
CHAE YOUNG JOO (KR)
KIM DONG HAN (KR)
CHANG DONG GYU (KR)
KIM JI YOON (KR)
LEE MI SUN (KR)
CHAE YOUNG JOO (KR)
KIM DONG HAN (KR)
Application Number:
PCT/KR2015/008730
Publication Date:
July 07, 2016
Filing Date:
August 21, 2015
Export Citation:
Assignee:
SAMSUNG SDI CO LTD (KR)
International Classes:
H01M4/525; C01G53/00; H01M4/505; H01M10/052
Domestic Patent References:
| WO2014007358A1 | 2014-01-09 | |||
| WO2014058068A1 | 2014-04-17 |
Foreign References:
| KR20100109605A | 2010-10-11 | |||
| KR20100130522A | 2010-12-13 | |||
| KR20130125124A | 2013-11-18 |
Attorney, Agent or Firm:
Y.P.LEE, MOCK & PARTNERS (KR)
리앤목특허법인 (KR)
리앤목특허법인 (KR)
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