Synthesis and Electrochemical Properties of Li3V2(PO4)3-LiMnPO4 Composite Cathode Material for Lithium-ion Batteries
Synthesis and Electrochemical Properties of Li3V2(PO4)3-LiMnPO4 Composite Cathode Material for Lithium-ion Batteries
- 주제(키워드) Li-ion batteries , Mechanochemical process , Composite , Li3V2(PO4)3 , LiMnPO4
- 발행기관 대한화학회
- 발행년도 2013
- 총서유형 Journal
- UCI G704-000067.2013.34.2.049
- KCI ID ART001742841
- 본문언어 영어
초록/요약
Carbon-coated Li3V2(PO4)3-LiMnPO4 composite cathode materials are first reported in this work, prepared by the mechanochemical process with a complex metal oxide as the precursor and sucrose as the carbon source. X-ray diffraction pattern of the composite material indicates that both olivine LiMnPO4 and monoclinic Li3V2(PO4)3 co-exist. We further investigated the electrochemical properties of our Li3V2(PO4)3-LiMnPO4 composite cathode materials using galvanostatic charging/discharging tests, where our Li3V2(PO4)3-LiMnPO4 composite electrode materials exhibit the charge/discharge efficiency of 91.9%, while Li3V2(PO4)3 and LiMnPO4 exhibit the efficiency of 87.7 and 86.7% in the first cycle. The composites display unique electrochemical performances in terms of overvoltage and cycle stability, displaying a reduced gap of 141.6 mV between charge and discharge voltage and 95.0% capacity efficiency after 15th cycles.
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