Hierarchical NiCoO2 Nanosheets Anchored on Hollow Carbon Spheres for High‐Performance Lithium‐Ion Battery Anodes

This study reports the synthesis of hierarchical NiCoO2 nanosheets growing on hollow carbon spheres (denoted as NiCoO2 NSs@HCS) via a facile and low‐cost process. When evaluated as anode materials for lithium‐ion batteries, the as‐prepared NiCoO2 NSs@HCS exhibits high specific capacity, enhanced cyc...

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Bibliographic Details
Published in:ChemPlusChem (Weinheim, Germany) Germany), 2018-10, Vol.83 (10), p.929-933
Main Authors: Chen, Sheng, Liang, Jin, Pang, Yuanchao, Dong, Bitao, Xu, Xin, Ding, Shujiang
Format: Article
Language:English
Subjects:
hierarchical materials
lithium-ion batteries
nanomaterials
NiCoO2
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Summary:This study reports the synthesis of hierarchical NiCoO2 nanosheets growing on hollow carbon spheres (denoted as NiCoO2 NSs@HCS) via a facile and low‐cost process. When evaluated as anode materials for lithium‐ion batteries, the as‐prepared NiCoO2 NSs@HCS exhibits high specific capacity, enhanced cycling stability, and good rate capability. A high discharge capacity of 631.7 mA h g−1 is delivered even after 200 cycles at a current density of 400 mA g−1, corresponding to approximately 92 % of the second reversible discharge capacity. The hierarchical and hollow structure of NiCoO2 NSs@HCS plays a role in its excellent performance. Advanced architecture: A new hierarchical material consisting of NiCoO2 nanosheets grown on hollow carbon spheres was used as the anode material in lithium‐ion batteries (see figure). This material not only buffers the large volume change during the charging–discharging processes, but also provides more active sites for lithium‐ion storage. Even after 200 cycles at a current density of 400 mA g−1, a high discharge capacity of 631.7 mAh g−1 is retained.
ISSN:2192-6506
2192-6506
DOI:10.1002/cplu.201800102