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학술지 Effect of Co3(PO4)2 Coating on the Li[Co0.1Ni0.15Li0.2Mn0.55]O2 Cathode Material for Lithium Rechargeable Batteries
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저자
이상효, 구본급, 김진철, 김광만
발행일
200809
출처
Journal of Power Sources, v.184 no.1, pp.276-283
ISSN
0378-7753
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.jpowsour.2008.05.091
협약과제
08MC3300, RFID/USN용 센서 태그 및 센서 노드 기술 개발, 표철식
초록
To prepare a high-capacity cathode material with improved electrochemical performance for lithium rechargeable batteries, Co3(PO4)2 nanoparticles are coated on the surface of powdered Li[Co0.1Ni0.15Li0.2Mn0.55] O2, which is synthesized by a simple combustion method. The coated powder prepared under proper conditions for Co3(PO4)2 content and annealing temperature shows an optimum coating layer that consists of a LixCoPO4 phase formed by reaction with lithium impurities during heat treatment. A sample coated with 3 wt.% Co3(PO4)2 and annealed at 800 °C proves to be the best in terms of specific capacity, cycle performance and rate capability. Thermal stability is also enhanced by the coating, as demonstrated a decrease in the onset temperature and/or the heat generated during thermal runaway. © 2008 Elsevier B.V. All rights reserved.
키워드
Cathode materials, Co (PO ) coating 3 4 2, Cycle performance, Rate capability, Rechargeable lithium batteries
KSP 제안 키워드
Annealing temperature, Cathode materials, Coated powders, Cycle performance, Effect of CO, High-capacity cathode, Onset temperature, Rate Capability, Thermal runaway, Thermal stability(TGA), coating layer