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- Title
Synergistic effect of nanometerization and uniform amorphous carbon coating on FeSe<sub>2</sub> sodium ion battery anode materials.
- Authors
Cao, Hao; Zhang, Shengnan; Liu, Jixing; Shao, Botao; Zhang, Wen; Liu, Xueqian; Feng, Jianqing; Li, Chengshan; Cui, Yaru
- Abstract
FeSe2-based materials as potential anode materials for sodium-ion batteries (SIBs) have caused extensive attention due to their high theoretical capacity and suitable working potential. However, due to the large volume expansion during cycling and poor electrical conductivity, it is still not possible for FeSe2-based materials to be commercialized. In this paper, FeSe2 flower-like nanoclusters were synthesized by a simple solvothermal method. Carbon coating was performed with glucose and graphene as carbon sources. Uniform amorphous carbon-coated FeSe2@C and FeSe2@G powders were obtained accordingly. The carbon layer formed by glucose can well limit the further growth of nanoparticles during heat treatment due to the sufficient carbon layer thickness. When tested as anode in SIBs, due to the uniform coating of carbon, FeSe2@C powders exhibited better electrochemical performance with the first discharge-specific capacity of 423 mAh g−1. Compared with the specific capacity of 291 mAh g−1 for FeSe2@G sample, the improved electrochemical performances could be attributed to both the nanosized structures and the uniform carbon coating for anode application in sodium-ion batteries.
- Subjects
AMORPHOUS carbon; SODIUM ions; ELECTRIC conductivity; UNIFORM spaces; SURFACE coatings
- Publication
Journal of Materials Science: Materials in Electronics, 2022, Vol 33, Issue 21, p16728
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-022-08529-7