Layer-by-layer self-assembly of graphene-like Co3O4nanosheet/graphene hybrids: Towards high-performance anode materials for lithium-ion batteries
Layer-by-layer self-assembly of graphene-like Co3O4nanosheet/graphene hybrids: Towards high-performance anode materials for lithium-ion batteries
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类石墨烯Co3O4纳米片/石墨烯杂化物的层层自组装：迈向高性能锂离子电池负极材料
DOI：
10.1016/j.jallcom.2016.01.136
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发表时间：
2016
影响因子：
6.2
通讯作者：
Jun Liu
中科院分区：
文献类型：
--
作者：
Qian Yang;Jun Wu;Kai Huang;Ming Lei;Wenjun Wang;Shasha Tang;Peijie Lu;Yakun Lu;Jun Liu
We have successfully synthesized graphene-like Co(OH)2and fabricated sandwich-like Co(OH)2/graphene hybrids by the electrostatic self-assembly. After annealing at low temperatures, we further fabricated Co3O4nanosheet/graphene hybrids, in which the thickness of graphene-like Co3O4nanosheets is only ∼5 nm. The as-prepared product exhibits a very high reversible lithium storage capacity up to 982.6 mAh g−1after 50 cycles, while pure Co3O4nanosheets only show the discharge capacity of 108 mAh g−1after 50 cycles. Moreover, in comparison with the reported results, it exhibits an ultrahigh rate capability of 209.7 mAh g−1at 5000 mA g−1. The greatly improved electrochemical performances may be ascribed to the sandwich-like structure of ultrathin Co3O4nanosheet/graphene.
