Carbon/Gelatin Microcapsules for Sulfur Cathode: A Micro-Reactor Suppressing "Shuttle Effect". Issue 6 (1st April 2019)

• Record Type: Journal Article
• Authors: Sun, Xiaogang; Peng, Qifan; Ge, Yunling; Akhtar, Naseem; Sun, Wenhao; Wang, Weikun; Wang, Anbang; Zhang, Hao; Huang, Yaqin
• Is Part Of: Journal of the Electrochemical Society. Volume 166:Issue 6(2019)
• Page Start: A1045
• Page End: A1050
• Publication Date: 2019-04-01
• Subjects: Batteries - Lithium -- Microcapsule -- Shuttle Effect -- Sulfur Cathode; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.1141904jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Lithium-sulfur battery, which has high theoretical specific capacity and energy density, is considered to be one of the next-generation of rechargeable batteries. But the "shuttle effect" still hinders its application. Here, carbon/gelatin microcapsule (C/GM) as a micro-reactor for sulfur cathode to suppress "shuttle effect" is prepared. The submicron-sulfur particles, which are synthesized with the regulation of gelatin, are encapsulated in the C/GM so that a region-limited electrochemical reaction can be realized. Benefiting from the micro-reactor inhibiting the dissolution of polysulfide, the initial discharge specific capacity of lithium-sulfur battery with C/GM cathode is up to 1259.0 mAh/g and still retains 961.0 mAh/g after 100 cycles. Due to the sustainable source and facile method, the C/GM cathode is promising for the application of lithium-sulfur batteries.