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题目:

Stabilizing Nickel Sulfide Nanoparticles with An Ultrathin Carbon Layer for Improved Cycling Performance in Sodium Ion Batteries

 

 

作者:

Feipeng Zhao1,§, Qiufang Gong1,§, Brian Traynor2, Duo Zhang1, Jiaojiao Li1, Hualin Ye1, Fengjiao Chen1, Na Han1, Yeyun Wang1, Xuhui Sun1, and Yanguang Li1

 

 

单位:

1Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China

2Departments of Physics and Chemistry, Trinity College, University of Dublin, Dublin 2, Ireland

§The two authors contributed equally to this work.

 

 

摘要:

Nanostructured metal sulfides are potential electrode materials for sodium-ion batteries; however, they typically suffer from very poor cycling stability due to large volume changes and dissolution of discharge products. Herein we propose a rational material design strategy for sulfide-based materials to address these problems. Taking nickel sulfide (NiSx) as an example, we demonstrated that its electrochemical performance can be dramatically improved by confining the NiSx nanoparticles in a percolating conductive carbon nanotube network, and stabilizing them with an ultrathin carbon coating layer. The carbon layer serves as a physical barrier to alleviate the effects of both the volume change and dissolution of active materials. The hybrid material exhibited a large reversible specific capacity of >500 mAh/g and excellent cycling stability over 200 cycles. Given the traditionally problematic nature of NiSx as a battery anode material, we believe that the observed high performance reported here reflects the effectiveness of our material design strategy.

 

 

影响因子:

8.893

 

 

分区情况:

1

 

 

链接:

http://link.springer.com/article/10.1007/s12274-016-1198-3

 

(责任编辑:金晓瑜 联系方式:xyjin@suda.edu.cn


 

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