Carbon coated ultrasmall anatase TiO2 nanocrystal anchored on N,S-RGO as high-performance anode for sodium ion batteries

被引:2
|
作者
Lingfei Zhao [1 ]
Tong Tang [1 ]
Weihua Chen [1 ]
Xiangming Feng [1 ]
Liwei Mi [2 ]
机构
[1] College of Chemistry and Molecular Engineering,Zhengzhou University
[2] Center for Advanced Materials Research,Zhongyuan University of Technology
基金
中国国家自然科学基金;
关键词
Titanium dioxide; Nitrogen/sulfur doping RGO; Sodium ion battery; Long cycle life;
D O I
暂无
中图分类号
TM912 [蓄电池];
学科分类号
0808 ;
摘要
Anatase TiO2has been investigated as one of the most promising anode materials for sodium ion batteries(SIBs)with low cost and high theoretical capacity.Herein,a composite material of TiO2/N,S-RGO@C with carbon coated ultrasmall anatase TiO2anchored on nitrogen and sulfur co-doped RGO matrix was successfully prepared by a rational designed process.The composite structure exhibited ultrasmall crystal size,rich porous structure,homogeneous heteroatoms doping and thin carbon coating,which synergistically resulted in elevated electron and ion transfer.The anode exhibited high rate capacities with good reversibility under high rate cycling.The carbon coating was investigated to be effective to prevent active material falling and lead to long term cycling performance with a high capacity retention of 181 m Ah gà1after 2000cycles at 2 C.Kinetic studies were carried out and the results revealed that the superior performance of the composite material were derived from the decreased charge transfer resistance and elevated ion diffusion.Results suggested that the TiO2/N,S-RGO@C composite is a promising anode material for sodium ion batteries.
引用
收藏
页码:277 / 285
页数:9
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