Sulfurized activated carbon for high energy density supercapacitors

被引：141

作者：

Huang, Yunxia ^{[1
,2
]}

Candelaria, Stephanie L. ^{[2
]}

Li, Yanwei ^{[2
]}

Li, Zhimin ^{[1
]}

Tian, Jianjun ^{[2
]}

Zhang, Lili ^{[2
]}

Cao, Guozhong ^{[2
]}

机构：

[1] Xidian Univ, Sch Adv Mat & Nanotechnol, Xian 710071, Peoples R China

[2] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

来源：

JOURNAL OF POWER SOURCES | 2014年 / 252卷

基金：

美国国家科学基金会;

关键词：

Supercapacitor; Sulfur; Specific capacitance; Energy density; Activated carbon; CORROSION BEHAVIOR; ELECTROCHEMICAL PROPERTIES; PORE-SIZE; ELECTRODE; COATINGS; PERFORMANCE; CAPACITANCE; POLY(3,4-ETHYLENEDIOXYTHIOPHENE); CONDUCTIVITY; IMPROVEMENT;

D O I：

10.1016/j.jpowsour.2013.12.004

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sulfurized activated carbon (SAC), made by coating the pore surface with thiophenic sulfur functional groups from the pyrolysis of sulfur flakes, were characterized and tested for supercapacitor applications. From X-ray photoelectron spectroscopy (XPS), the sulfur content in the SAC was found to be 2.7 at%. Electrochemical properties from potentiostatic and galvanostatic measurements, and electrochemical impedance spectroscopy (EIS) were used to evaluate the effect of sulfur on porous carbon electrodes. The SAC electrode exhibits better conductivity, and an obvious increase in specific capacitance that is almost 40% higher than plain activated carbons (ACs) electrode at a high current density of 1.4 A g(-1). The proposed mechanism for improved conductivity and capacitive performance due to the sulfur functional groups on ACs will be discussed. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：90 / 97

页数：8

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