Halide‐Ion‐Assisted Synthesis of Different α‐Fe 2 O 3 Hollow Structures and Their Lithium‐Ion Storage Properties
2014; Wiley; Volume: 80; Issue: 3 Linguagem: Inglês
10.1002/cplu.201402236
ISSN2192-6506
AutoresRuguang Ma, Man Wang, Duc Tai Dam, Yucheng Dong, Yu Chen, Seung Ki Moon, Yong‐Jin Yoon, Jong‐Min Lee,
Tópico(s)Copper-based nanomaterials and applications
ResumoVarious α-Fe2 O3 hollow structures, such as wormlike shapes, ellipsoids, and quasicubes, were synthesized successfully by a halide-ion-assisted solvothermal method. The self-assembly assisted by selective absorption of halide ions and Ostwald ripening speeded up by acidic etching commonly determine the final unique structures. The electrochemical performance of the α-Fe2 O3 with different structures in reversible lithium-ion storage was investigated, and showed that the hollow Fe2 O3 quasicubes exhibit the best cycling performance with a charge capacity of 401.6 mAh g-1 after 100 cycles at 0.2 C. The superior cycling stability and high specific capacity can be ascribed to the higher specific surface area, lower charge-transfer resistance, and adequate alleviation of volume variation.
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