Graphene-Wrapped Cr<sub>2</sub>O<sub>3</sub> Hollow Nanospheres with Enhanced Electrochemical Performances for Lithium-Ion Batteries

Hui Xu; Min Zeng; Jing Li

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Graphene-Wrapped Cr₂O₃ Hollow Nanospheres with Enhanced Electrochemical Performances for Lithium-Ion Batteries

机译：石墨烯包裹的Cr _{2 O _{3 空心纳米球增强了锂离子电池的电化学性能}}

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Graphene-wrapped Cr2O3 hollow nanospheres were prepared using a facile two-step process bysolvothermal to synthesize Cr2O3 hollow nanospheres and then hydrothermal reduction of the GO withurea to yield graphene coating on Cr2O3 hollow nanospheres. The graphene/Cr2O3 composites exhibitnot only a high reversible capacity of over 700 mAhg for the first cycle, but also an outstandingcycling stability and rate capability. Various characterization methods indicate that the Cr2O3 hollownanospheres are uniformly distributed on the surface and interlayer of graphene sheets. The positivesynergistic effect of the Cr2O3 hollow nanospheres and graphene coating may be beneficial to improveelectrochemical performances of these composite electrodes.

机译：石墨烯包裹的Cr2O3空心纳米球的制备方法是：采用两步法，通过溶剂热法合成Cr2O3空心纳米球，然后水热还原GO脲，在Cr2O3空心纳米球上形成石墨烯涂层。石墨烯/ Cr2O3复合材料不仅在第一个循环中显示出超过700 mAhg的高可逆容量，而且还具有出色的循环稳定性和倍率性能。各种表征方法表明，Cr2O3中空纳米球均匀分布在石墨烯片的表面和夹层上。 Cr2O3空心纳米球和石墨烯涂层的正协同效应可能有益于改善这些复合电极的电化学性能。

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《International Journal of Electrochemical Science》 |2015年第9期|共10页
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Hui Xu; Min Zeng; Jing Li;
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Graphene-Wrapped Cr2O3 Hollow Nanospheres with Enhanced Electrochemical Performances for Lithium-Ion Batteries

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Graphene-Wrapped Cr₂O₃ Hollow Nanospheres with Enhanced Electrochemical Performances for Lithium-Ion Batteries