The Electrochemical Performance of Li3V2(PO4)(3)/Graphene Nano-powder Composites as Cathode Material for Li-ion Batteries
- Authors
- Choi, Mansoo; Kim, Hyun-Soo; Lee, Young Moo; Jin, Bong-Soo
- Issue Date
- Dec-2014
- Publisher
- KOREAN ELECTROCHEMISTRY SOC
- Keywords
- Lithium vanadium phosphate; graphene nano-powder; electrical conductivity; Li-ion battery
- Citation
- JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY, v.5, no.4, pp.109 - 114
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY
- Volume
- 5
- Number
- 4
- Start Page
- 109
- End Page
- 114
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/133973
- DOI
- 10.5229/JECST.2014.5.4.109
- ISSN
- 2093-8551
- Abstract
- The Li3V2(PO4)(3)/graphene nano-particles composite was successfully synthesized by a facile sol-gel method. The addition of a graphene in Li3V2(PO4)(3)(LVP) showed the high crystallinity and influenced the morphology of the Li3V2(PO4)(3) particles observed in X-ray diffraction (XRD) and scanning electron microscopy (SEM). The LVP/graphene samples were well connected, resulting in fast charge transfer. The effect of the addition graphene nano-particles on electrochemical performance of the materials was investigated. Compared with the pristine LVP, the LVP/graphene composite delivered a higher discharge capacity of 122 mAh g(-1) at 0.1 C-rate, better rate capability and cyclability in the potential range of 3.0-4.3 V. The electrochemical impedance spectra (EIS) measurement showed the improved electronic conductivity for the LVP/graphene composite, which can ensure the high specific capacity and rate capability.
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