Phase-pure β-NiMoO4 yolk-shell spheres for high-performance anode materials in lithium-ion batteries

Phase-pure β-NiMoO4 yolk-shell spheres for lithium-ion battery anodes were prepared for the first time by one-pot spray pyrolysis, and their electrochemical properties were investigated. The yolk-shell-structured β-NiMoO4 powders exhibited high initial discharge/charge capacities (1634/1253mAhg−1) a...

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Bibliographic Details
Published in:Electrochimica acta 2015-08, Vol.174, p.102-110
Main Authors: Ahn, Jee Hyun, Park, Gi Dae, Kang, Yun Chan, Lee, Jong-Heun
Format: Article
Language:English
Subjects:
Energy conversion
Energy storage materials
Lithium ion batteries
Nanostructures
Synthesis design
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Summary:Phase-pure β-NiMoO4 yolk-shell spheres for lithium-ion battery anodes were prepared for the first time by one-pot spray pyrolysis, and their electrochemical properties were investigated. The yolk-shell-structured β-NiMoO4 powders exhibited high initial discharge/charge capacities (1634/1253mAhg−1) at a current density of 1000mAg−1. After 200 cycles, these powders exhibited a high discharge capacity of 1292mAhg−1, whereas the initial discharge capacity (1341mAhg−1) of the filled structured NiMoO4 powders was dramatically decreased to 479mAhg−1. The significant enhancement of the cycling performance of the β-NiMoO4 powders with ultrafine crystallite size was attributed to the structural stability of the yolk-shell structure.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2015.05.149