Carbon nanofiber-sulfur composite cathode materials with different binders for secondary Li/S cells

被引：116

作者：

Rao, Mumin ^{[1
,2
]}

Song, Xiangyun ^{[2
]}

Liao, Honggang ^{[3
]}

Cairns, Elton J. ^{[1
,2
]}

机构：

[1] Univ Calif Berkeley, Dept Chem & Biomol Engn, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

ELECTROCHIMICA ACTA | 2012年 / 65卷

关键词：

Sulfur; Carbon nanofiber; Binder; Cathode material; Lithium cell; RECHARGEABLE LITHIUM BATTERIES; IONIC LIQUID ELECTROLYTE; ELECTROCHEMICAL PERFORMANCE; REDUCTION; MECHANISMS;

D O I：

10.1016/j.electacta.2012.01.051

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A sulfur-coated carbon nanofiber (CNF-S) composite cathode material was prepared by a chemical deposition method in an aqueous solution. This CNF-S material was evaluated as the cathode material in lithium/sulfur cells with three different binders. The results of the SEM and TGA measurements reveal that CNF-S has a typical core-shell structure, containing 75.7 w/o sulfur coated uniformly on the surface of the CNFs. The effects of different binders on the potential profiles, electrode capacity and capacity retention with cycling were investigated. The electrode prepared with CMC + SBR binder has the best performance compared with PVdF and PEO binders, exhibiting a specific capacity of up to 1313 mAh g(-1) Sat the initial discharge and a specific capacity of 586 mAh g(-1) S after 60 cycles. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：228 / 233

页数：6

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