Discharge reaction mechanism of room-temperature sodium-sulfur battery with tetra ethylene glycol dimethyl ether liquid electrolyte

被引：162

作者：

Ryu, Hosuk ^{[1
]}

Kim, Taebum ^{[2
]}

Kim, Kiwon ^{[1
]}

Ahn, Jou-Hyeon ^{[3
]}

Nam, Taehyun ^{[1
]}

Wang, Guoxiu ^{[1
,4
]}

Ahn, Hyo-Jun ^{[1
]}

机构：

[1] Gyeongsang Natl Univ, ERI, WCU, Sch Mat Sci & Engn,I Cube Ctr,PRC, Jinju, South Korea

[2] Osaka Univ, Grad Sch Engn, Div Mat & Mfg Sci, Osaka, Japan

[3] Gyeongsang Natl Univ, Dept Chem & Biol Engn, PRC, Jinju, South Korea

[4] Univ Technol Sydney, Dept Chem & Forens Sci, Sydney, NSW 2007, Australia

来源：

JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 11期

关键词：

Room temperature sodium-sulfur cell; Sulfur electrode; TEGDME electrolyte; Discharge reaction mechanism; CATHODE MATERIALS;

D O I：

10.1016/j.jpowsour.2011.01.109

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 first discharge curve of a sodium-sulfur cell using a tetra ethylene glycol dimethyl ether liquid electrolyte at room temperature shows two different regions: a sloping region and a plateau region of 1.66V. The first discharge capacity is 538 mAhg(-1) sulfur and then decreases with repeated charge-discharge cycling to give 240 mAh g(-1) after ten cycles. Elemental sulfur of the cathode changes to sodium polysul-fides Na2S2 and Na2S3,during full discharge. The sodium polysulfides, however, do not reduce completely to elemental sulfur after full charging. In summary, the mechanism of the battery with liquid electrolyte is 2Na + nS -> Na2Sn(4 > n >= 2) on discharge and Na2Sn(4 > n >= 2) -> x(2Na + nS)+ (1 -x)Na2Sn(5 > n > 2) on charge. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：5186 / 5190

页数：5

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