Carbon nanofiber-sulfur composite cathode materials with different binders for secondary Li/S cells
Carbon nanofiber-sulfur composite cathode materials with different binders for secondary Li/S cells
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DOI：
10.1016/j.electacta.2012.01.051
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发表时间：
2012-03-30
影响因子：
6.6
通讯作者：
Cairns, Elton J.
中科院分区：
文献类型：
--
作者：
Rao, Mumin;Song, Xiangyun;Cairns, Elton J.
采用水溶液化学沉积法制备了硫包覆碳纳米纤维（CNF-S）复合正极材料。将该CNF-S材料作为具有三种不同粘合剂的锂/硫电池中的阴极材料进行评价。SEM和TGA测试结果表明，CNF-S具有典型的核壳结构，含硫量为75.7w/o，均匀地包覆在CNF表面。研究了不同粘结剂对电极电位分布、电极容量和循环容量保持率的影响。与PVdF和PEO粘结剂相比，CMC + SBR粘结剂制备的电极具有最好的性能，首次放电比容量高达1313 mAh g（-1）S，60次循环后比容量为586 mAh g（-1）S。(C)2012爱思唯尔有限公司保留所有权利。
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.