MOF-derived hollow NiCo 2 O 4 nanowires as stable Li-ion battery anodes

Although binary metal oxides with high theoretical specific capacities and power densities are widely investigated as promising anode materials for lithium-ion batteries (LIBs), their poor cycling stability and huge volume expansion largely limit their extensive application in practical electrode ma...

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Veröffentlicht in:Dalton transactions : an international journal of inorganic chemistry 2020-08, Vol.49 (31), p.10808-10815
Hauptverfasser: Chu, Kainian, Li, Zhiqiang, Xu, Shikai, Yao, Ge, Xu, Yang, Niu, Ping, Zheng, Fangcai
Format: Artikel
Sprache:eng
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Zusammenfassung:Although binary metal oxides with high theoretical specific capacities and power densities are widely investigated as promising anode materials for lithium-ion batteries (LIBs), their poor cycling stability and huge volume expansion largely limit their extensive application in practical electrode materials. Herein, we report a facile strategy to synthesize hollow NiCo 2 O 4 nanowires through direct calcination of binary metal–organic frameworks (MOFs) in air. When evaluated as an anode material for LIBs, NiCo 2 O 4 nanowires deliver a reversible capacity of 1310 mA h g −1 at a current density of 100 mA g −1 after 100 cycles. Even at a high current density of 1 A g −1 , NiCo 2 O 4 nanowires exhibit long-term cycling stability with a capacity of 720 mA h g −1 after 1000 cycles. The outstanding lithium-storage performance can be attributed to the unique structures with 1D porous channels, which are beneficial for the fast transfer of Li + ions and electrolyte and alleviate the strain caused by the volume expansion during cycling processes.
ISSN:1477-9226
1477-9234
DOI:10.1039/D0DT00553C