Electrochemical Performance of M₂GeO₄ (M = Co, Fe and Ni) as Anode Materials with High Capacity for Lithium-Ion Batteries
- Authors
- Yuvaraj, Subramanian; Park, Myung-Soo; Kumar, Veerasubramani Ganesh; Lee, Yun Sung; Kim, Dong-Won
- Issue Date
- Dec-2017
- Publisher
- KOREAN ELECTROCHEMISTRY SOC
- Keywords
- M2GeO4 electrode; Anode material; Lithium-ion battery; Carbon coating
- Citation
- JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY, v.8, no.4, pp.323 - 330
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY
- Volume
- 8
- Number
- 4
- Start Page
- 323
- End Page
- 330
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/151055
- DOI
- 10.33961/JECST.2017.8.4.323
- ISSN
- 2093-8551
- Abstract
- M2GeO4 (M = Co, Fe and Ni) was synthesized as an anode material for lithium-ion batteries and its electrochemical characteristics were investigated. The Fe2GeO4 electrode exhibited an initial discharge capacity of 1127.8 mAh g(-1) and better capacity retention than Co2GeO4 and Ni2GeO4. A diffusion coefficient of lithium ion in the Fe2GeO4 electrode was measured to be 12.7 x 10(-8) cm(2) s(-1), which was higher than those of the other two electrodes. The electrochemical performance of the Fe2GeO4 electrode was improved by coating carbon onto the surface of Fe2GeO4 particles. The carbon-coated Fe2GeO4 electrode delivered a high initial discharge capacity of 1144.9 mAh g(-1) with good capacity retention. The enhanced cycling performance was mainly attributed to the carbon-coated layer that accommodates the volume change of the active materials and improves the electronic conductivity. Our results demonstrate that the carbon-coated Fe2GeO4 can be a promising anode material for achieving high energy density lithium-ion batteries.
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