Synthesis and Electrochemical Properties of Li3V2(PO4)3-LiMnPO4 Composite Cathode Material for Lithium-ion Batteries

Title
Synthesis and Electrochemical Properties of Li3V2(PO4)3-LiMnPO4 Composite Cathode Material for Lithium-ion Batteries
Authors
윤진식김수조병원이관영정경윤장원영
Keywords
Li-ion batteries; cathode; mechanochemical process; Li3V2(PO4)3-LiMnPO4; Composite; LiMnPO4
Issue Date
2013-02
Publisher
Bulletin of the Korean Chemical Society
Citation
VOL 34, NO 2, 433-436
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/44546
ISSN
02532964
Appears in Collections:
KIST Publication > Article
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