Discharge behavior of lithium/sulfur cell with TEGDME based electrolyte at low temperature

被引:139
作者
Ryu, Ho-Suk [1 ]
Ahn, Hyo-Jun [1 ]
Kim, Ki-Won [1 ]
Ahn, Jou-Hyun [1 ]
Cho, Kwon-Koo [1 ]
Nam, Tae-Hyun [1 ]
Kim, Jong-Uk [1 ]
Cho, Gyu-Bong [1 ]
机构
[1] Gyeongsang Natl Univ, Informat Technol Res Ctr Energy Storage & Convers, Div Adv Mat Sci & Engn, Jinju 660701, South Korea
关键词
low temperature; Li/S cell; liquid electrolyte; TEGDME; DOXL; MA;
D O I
10.1016/j.jpowsour.2005.12.061
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
The low temperature behaviors of Li/TEGDNM/S cell was examined using discharge curves, SEM and impedance spectra. The first discharge capacity of Li/S cell with tetra(ethylene glycol) dimethyl ether (TEGDME) electrolyte was 1303 mAh g(-1)-sulfur at 20 degrees C, but 357 mAh g(-1)-sulfur at low temperature of -10 degrees C. The low temperature discharge characteristic is improved by adding 1,3-dioxolane (DOXL) and methylacetate (MA) to TEGDME electrolyte. The optimum composition of mixed electrolyte is MA-DOXL-TEGDME (5:47.5:47:5, v/v). The Li/S cell using the optimum electrolyte has the first discharge capacity of 994 and 1342 mAh g(-1)-S at -10 and 20 degrees C, respectively. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:201 / 206
页数:6
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