Mildly reduced less defective graphene oxide/sulfur/carbon nanotube composite films for high-performance lithium–sulfur batteries. Issue 16 (6th April 2016)

• Record Type: Journal Article
• Authors: Li, Rui; Zhang, Miao; Li, Yingru; Chen, Ji; Yao, Bowen; Yu, Mingpeng; Shi, Gaoquan
• Is Part Of: Physical chemistry chemical physics. Volume 18:Issue 16(2016)
• Page Start: 11104
• Page End: 11110
• Publication Date: 2016-04-06
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c6cp00512h
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Mildly reduced less defective graphene oxide (mrLGO) has a good conductivity and a high content of oxygenated groups, providing the freestanding mrLGO/S/CNT cathode with superior performance in Li–S batteries. Abstract : The microstructures and properties of the carbonaceous matrices in the cathodes of lithium–sulfur (Li–S) batteries have strong effects on their performances. We prepared a ternary composite cathode of mildly reduced less defective graphene oxide (mrLGO), sulfur, and carbon nanotubes (CNTs) by filtration for Li–S batteries. This battery showed a high initial specific capacity of 1219 mA h g −1 at 0.2 C and a stable specific capacity of around 1000 mA h g −1 after 200 cycles with a coulombic efficiency of 99%. Its excellent performance is mainly attributed to the good conductivity and residual oxygen containing groups of mrLGO, and the three-dimensional (3D) framework constructed using mrLGO sheets and CNTs.