Carbon-coated graphene–Cr2O3 composites with enhanced electrochemical performances for Li-ion batter-资料下载-阿美特克科学仪器部-普林斯顿及输力强电化学

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Carbon-coated graphene–Cr2O3 composites with enhanced electrochemical performances for Li-ion batter

阅读：3410 发布时间：2014-08-26

Graphene-based Cr2O3 composites are prepared and exhibit better electrochemical properties

than free Cr2O3 particles without the graphene. The synthesis procedure consists of the

direct growth of CrOOH on the surface of graphene and the subsequent thermal decomposition

of CrOOH to Cr2O3. Moreover, the electrochemical properties of graphene-based

Cr2O3 are further improved through carbon coating, and two strategies are developed. Interestingly,

the carbon layers pyrolyzed from glucose on CrOOH can separate the particles on

the graphene and limit their growth, while those on Cr2O3 merely cover the particles and

cannot prevent particle aggregation. Consequently, compared to the latter carbon-coated

composite, the former shows further improved electrochemical behavior.