Volume 7, Issue 12 1900015
Communication

In Situ Synthesis of Sulfur Host with Chemisorption and Electrocatalytic Capability toward High-Performance Lithium–Sulfur Batteries

Huali Yu

Huali Yu

The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

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Xiaoqing Guo

Xiaoqing Guo

The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

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Xiaofei Liu

Xiaofei Liu

The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

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Suya Lu

Suya Lu

The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

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Youcai Lu

Youcai Lu

The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

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Qingchao Liu

Corresponding Author

Qingchao Liu

The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

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Zhongjun Li

Corresponding Author

Zhongjun Li

The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

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Zhanhang He

Corresponding Author

Zhanhang He

The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

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First published: 08 March 2019
Citations: 6

Abstract

Lithium–sulfur (Li–S) batteries have been attracting much attention because of their outstanding theoretical capacity and abundance of sulfur. However, there are still some drawbacks, in which the shuttling of soluble polysulfides in the charge and discharge process severely limits its practical application. Herein, new 3D interconnected carbon nanotubes (CNTs) embedded with in situ grown cobalt disulfide (CoS2) nanoparticles (CoS2/CNTs) as an advanced matrix for sulfur electrode are developed. The 3D interconnected CNTs exhibit a good conductivity and a highly porous structure, which are promising for fast electron transport and buffering volume expansion. Furthermore, abundant CoS2 nanoparticles not only help to chemically trap the soluble polysulfides but also dynamically enhance polysulfide redox reactions. Because of these synchronous advantages, enhanced electrochemical performances including high capacity, superior redox reaction kinetics, and excellent cycling stability are achieved.

Conflict of Interest

The authors declare no conflict of interest.

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