标题:Elaborate construction and electrochemical properties of lignin-derived macro-/micro-porous carbon-sulfur composites for rechargeable lithium-sulfur batteries: The effect of sulfur-loading time
作者:Yu, Faqi; Li, Yilin; Jia, Meng; Nan, Tian; Zhang, He; Zhao, Shiqiang; Shen, Qiang
作者机构:[Yu, Faqi; Li, Yilin; Jia, Meng; Nan, Tian; Zhang, He; Zhao, Shiqiang; Shen, Qiang] Shandong Univ, Educ Minist, Sch Chem & Chem Engn, Key Lab Colloid 更多
通讯作者:Shen, Qiang
通讯作者地址:[Shen, Q]Shandong Univ, Educ Minist, Sch Chem & Chem Engn, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China.
来源:JOURNAL OF ALLOYS AND COMPOUNDS
出版年:2017
卷:709
页码:677-685
DOI:10.1016/j.jallcom.2017.03.204
关键词:Lignin; Macro-/micro-porous carbon; Carbon-sulfur composites;; Sulfur-loading time; Lithium-sulfur batteries
摘要:In this paper, a framework of macro-/micro-porous carbon derived from commercial lignin is prepared by one-step carbonization/activation method and then utilized as sulfur-loading matrix to assay the effect of sulfur-loading time on the structural and electrochemical properties of carbon-sulfur composite (C-S-t, t defined as sulfur-loading time). As-prepared porous carbon possesses a high specific surface area of 1211.6 m(2) g(-1) and a pore volume of 0.59 cm(3) g(-1), acquires oxygen-containing functional groups on the surface of framework and functionalizes for the chemical adsorption of elemental sulfur. Under N-2 atmosphere (flow rate similar to 60 mL min(-1)) the longer is the sulfur-loading time, the lower value is the total sulfur content of carbon-sulfur composite and the higher percentage of sulfur embedded within the micropores. At a sulfur-loading time of similar to 10 h, the resulting C-S-10 composites have a total sulfur content as low as 50.0 wt% (44.8% in micropores) but exhibit the better electrochemical performances than C-S-6 composites formed at 6 h (sulfur similar to 58.8 wt%, 29.4% in micropores). Therefore, aside from the structural properties of porous carbon, an optimized sulfur-loading time, as well as the chemical binding between carbon host and sulfur, should be considered to develop high-performance cathode materials for liquid electrolyte lithium-sulfur (Li-S) batteries. (C) 2017 Elsevier B.V. All rights reserved.
收录类别:EI;SCOPUS;SCIE
WOS核心被引频次:7
Scopus被引频次:7
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85015999866&doi=10.1016%2fj.jallcom.2017.03.204&partnerID=40&md5=737b9932dd844dd18138e4d134a9ba54
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