Nanospace-Confinement Copolymerization Strategy for Encapsulating Polymeric Sulfur into Porous Carbon for Lithium Sulfur Batteries

作者：Ding, Bing; Chang, Zhi; Xu, Guiyin; Nie, Ping; Wang, Jie; Pan, Jin; Dou, Hui; Zhang, Xiaogang^*

来源：ACS Applied Materials & Interfaces, 2015, 7(21): 11165-11171.

DOI：10.1021/acsami.5b00870

• lithium-sulfur batteries
• copolymerization
• nanospace-confinement
• carbon/polymeric sulfur composites
• electrochemistry

Given their high theoretical energy density, lithium-sulfur (Li-S) batteries have recently attracted ever-increasing research interest. However, the dissolution of polysulfides and uncontrolled deposition of insoluble discharge product significantly hinder the cycling stability. Herein, a nanospace-confinement copolymerization strategy for encapsulating polymeric sulfur into porous carbon matrix is presented. The morphologies and sulfur contents of carbon/polymeric sulfur (C/PS) composites could be readily tailored by controlling the copolymerization time. Confining polymeric sulfur in the porous carbon with abundant interparticle pores facilitates rapid electronic/ionic transport and mitigates dissolution of polysulfides intermediates. More importantly, the organic sulfur units dispersed in the insoluble/insulating Li2S2/Li2S phase could prevent its irreversible deposition. Such nanostructure with tailored chemistry property permits the C/PS electrodes to exhibit enhanced cycling stability and high rate capability. The nanospace-confinement copolymerization strategy features general and facial advantages, which may provide new opportunities for the future development of advanced sulfur cathodes.

• 出版日期2015-6-3
• 单位南京航空航天大学