Poly(3, 4-ethylenedioxythiophene)-coated sulfur for flexible and binder-free cathodes of lithium–sulfur batteries. Issue 33 (10th August 2017)

• Record Type: Journal Article
• Authors: Zhang, Miao; Meng, Qinghai; Ahmad, Aziz; Mao, Lijuan; Yan, Wei; Wei, Zhixiang
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 33(2017)
• Page Start: 17647
• Page End: 17652
• Publication Date: 2017-08-10
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta03314a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Flexible lithium–sulfur batteries are of great importance for flexible electronic systems. Herein, a diamond-shaped sulfur-containing composite for large-area flexible electrodes was prepared, and a prototype of flexible lithium–sulfur battery is successfully demonstrated. Abstract : Flexible energy storage devices are becoming increasingly important for next-generation flexible electronic devices. However, the low energy density of conventional lithium-ion batteries cannot fulfill their high capacity requirement. Therefore, lithium–sulfur (Li–S) batteries with high theoretical capacity and energy density have attracted attention as new-generation energy storage devices. In this work, we designed a freestanding poly(3, 4-ethylenedioxythiophene) (PEDOT)-coated diamond-shaped sulfur (D-sulfur)/single-walled carbon nanotube (SWCNT) composite cathode. The conductive PEDOT and SWCNTs effectively confined the dissolution of lithium polysulfides, and a flexible network was successfully fabricated. The D-sulfur/SWCNT composite cathode exhibited a high capacity and stable cycling performance. The initial discharge capacity reached 1520 mA h g −1 at 0.1C, and the capacity retention was 76% after 250 cycles at 0.5C. Furthermore, the D-sulfur/SWCNT was used as a flexible cathode to fabricate a prototype of a flexible Li–S battery, which shows its potential application in flexible integrated systems.