Advanced intermediate-temperature Na-S battery

被引：149

作者：

Lu, Xiaochuan ^{[1
]}

Kirby, Brent W. ^{[1
]}

Xu, Wu ^{[1
]}

Li, Guosheng ^{[1
]}

Kim, Jin Y. ^{[1
]}

Lemmon, John P. ^{[1
]}

Sprenkle, Vincent L. ^{[1
]}

Yang, Zhenguo ^{[1
]}

机构：

[1] Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99354 USA

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2013年 / 6卷 / 01期

关键词：

SODIUM-SULFUR BATTERIES; RAMAN-SPECTROSCOPY; BETA ALUMINA; ENERGY; CHALLENGES; CONVERSION; ANIONS;

D O I：

10.1039/c2ee23606k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this study, we reported an intermediate-temperature (similar to 150 degrees C) sodium-sulfur (Na-S) battery. With a relatively low operating temperature, this novel battery could reduce the cost and safety issues associated with the conventional high-temperature (300-350 degrees C) Na- S battery. A dense beta ''-Al2O3 solid membrane and tetraglyme were utilized as the electrolyte separator and catholyte solvent in this battery. Solubility tests indicated that a cathode mixture of Na2S4 and S exhibited extremely high solubility in tetraglyme (e.g., >4.1 M for Na2S4 + 4 S). CV scans of Na2S4 in tetraglyme revealed two pairs of redox couples with peaks at around 2.22 and 1.75 V, corresponding to the redox reactions of polysulfide species. The discharge/charge profiles of the Na-S battery showed a slope region and a plateau, indicating multiple steps and cell reactions. In situ Raman measurements during battery operation suggested that polysulfide species were formed in the sequence of Na2S5 + S -> Na2S5 + Na2S4 -> Na2S4 + Na2S2 during discharge and in a reverse order during charge. This battery showed dramatic improvement in rate capacity and cycling stability over room-temperature Na- S batteries, which makes it more attractive for renewable energy integration and other grid related applications.

引用

页码：299 / 306

页数：8

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