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 |
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Hauptverfasser: | , , , , , , |
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. |
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ISSN: | 1477-9226 1477-9234 |
DOI: | 10.1039/D0DT00553C |