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Synthesis and electrochemical performance of carbon-coated Fe2GeO4 as an anode material for sodium-ion batteries

Title
Synthesis and electrochemical performance of carbon-coated Fe2GeO4 as an anode material for sodium-ion batteries
Author
김동원
Keywords
Fe2GeO4 anode; Carbon coating; NaCo0.5Fe0.5O2 cathode; Sodium-ion battery; Cycling performance
Issue Date
2019-02
Publisher
ELSEVIER SCIENCE SA
Citation
MATERIALS CHEMISTRY AND PHYSICS, v. 224, Page. 129-136
Abstract
The development of anode materials with high capacity and good cycling stability is one of the state-of-the-art objectives in the field of rechargeable sodium-ion batteries. In this work, we synthesized high-capacity spinel Fe2GeO4 using a facile hydrothermal method followed by calcination and investigated its electrochemical performance as an anode material for sodium-ion batteries. The Fe2GeO4 material delivered a high initial discharge capacity of 448.1 mAh g(-1) but it showed gradual capacity fading with a capacity retention of 67.4% after 50 cycles. Its high initial capacity originated from the high electrochemical activity of Fe caused by its multiple oxidation reactions. To enhance the cycling stability of the Fe2GeO4, carbon was coated onto the surface of Fe2GeO4 particles. The carbon-coated Fe2GeO4 (Fe2GeO4@C) exhibited an initial discharge capacity of 423.0 mAh g(-1) with good capacity retention. The sodium-ion full cell was assembled with an Fe2GeO4@C anode, and a NaCo0.5Fe0.5O2 cathode, and the results showed superior cycling performance, demonstrating that the Fe2GeO4@C can be used as a promising anode material for sodium-ion batteries.
URI
https://www.sciencedirect.com/science/article/pii/S0254058418310447?via%3Dihubhttp://repository.hanyang.ac.kr/handle/20.500.11754/108244
ISSN
0254-0584; 1879-3312
DOI
10.1016/j.matchemphys.2018.12.007
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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