A novel sulfur-impregnated porous carbon matrix as a cathode material for a lithium–sulfur battery

Yanhui Cui; Xiao Liang; Jue Ouyang; Jiayi Huang; Jiong Zeng; Junwei Wu; Zuohua Li; Chenqiang Du; Zhoufu Li; Andrew P. Baker; Kevin Huang; Xinhe Zhang

doi:10.1039/C6RA09338H

A novel sulfur-impregnated porous carbon matrix as a cathode material for a lithium–sulfur battery†

Yanhui Cui,^a Xiao Liang,^a Jue Ouyang,^a Jiayi Huang,^a Jiong Zeng,^a Junwei Wu,*^a Zuohua Li,*^b Chenqiang Du,^c Zhoufu Li,^c Andrew P. Baker,^a Kevin Huang^d and Xinhe Zhang^e

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* Corresponding authors

^a Shenzhen Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, China
E-mail: junwei.wu@hitsz.edu.cn
Fax: +86-755-2603-3504
Tel: +86-755-2603-3290

^b School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China
E-mail: lizuohua@hitsz.edu.cn
Fax: +86-755-2603-3509
Tel: +86-755-2603-4949

^c Department of Applied Chemistry, School of Chemical and Engineering, Tianjin University, Tianjin, China

^d Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29201, USA

^e Dongguan Mcnair Technology Co., LTD, Dongguan, China

Abstract

A novel sulfur-impregnated porous carbon matrix (PCM-Z-S) has been prepared as a cathode material for a lithium–sulfur battery. The porous carbon matrix (PCM-Z), which was obtained using de-waxed cotton and ZnCl₂ as an activator, has a surface area of 1056 m² g⁻¹ and a pore volume of 1.75 cm³ g⁻¹. The PCM-Z was mixed with sublimed sulfur and then heated in nitrogen gas to form a carbon–sulfur 58 wt% composite (PCM-Z-S) which has excellent electrochemical proprieties. The PCM-Z-S delivers a capacity of 850 mA h g⁻¹ at 1C and retains 630 mA h g⁻¹ after nearly 200 cycles which are values much higher than that of a carbon matrix prepared without ZnCl₂. These results show the sulfur-impregnated porous carbon matrix (PCM-Z-S) has great potential as a cathode material in a lithium–sulfur battery.

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A novel sulfur-impregnated porous carbon matrix as a cathode material for a lithium–sulfur battery†

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A novel sulfur-impregnated porous carbon matrix as a cathode material for a lithium–sulfur battery

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