文献类型：期刊文献

英文题名：Integrated reactor architecture of conductive network and catalytic nodes to accelerate polysulfide conversion for durable and high-loading Li-S batteries

作者：Wu, Qingping[1,3,4,5];Shadike, Zulipiya[6];Xu, Jun[5];Cao, Fahai[5];Li, Chilin[1,2,3]

机构：[1]Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Mat Energy Convers, Shanghai 201899, Peoples R China;[2]Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China;[3]Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine M, 585 He Shuo Rd, Shanghai 201899, Peoples R China;[4]Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China;[5]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[6]Shanghai Jiao Tong Univ, Inst Fuel Cells, Sch Mech Engn, Shanghai 200240, Peoples R China

年份：2023

卷号：55

起止页码：73

外文期刊名：ENERGY STORAGE MATERIALS

收录：;EI(收录号：20230113345108);WOS:【SCI-EXPANDED(收录号:WOS:000913285200002)】；

基金：This work was supported by National Natural Science Foundation of China (21975276) , and Shanghai Science and Technology Committee (20520710800) . C. L. Li appreciates the support by Program of Shanghai Academic Research Leader (21XD1424400) . This research used the re- sources at Beamline 7 -BM (QAS) of the National Synchrotron Light Source II, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under Contract no. DE-SC0012704.

语种：英文

外文关键词：Lithium -sulfur batteries; Hierarchical porous host; Conversion reactions; Electrocatalyst nodes; Integrated reactor architecture; Electrode micro electric field

摘要：The development of carbon-based heterogeneous framework host with synergistic catalytic and conductive ef-fects for sulfur cathode is a promising strategy to realize high performance lithium sulfur batteries (LSBs). Here, an integrated reactor architecture with defective carbon nodes (IRA-DC) is designed for serving as high-loading (92.4 wt%) sulfur host. The hierarchical porous IRA-DC consists of untangled conductive carbon nanotube network and Co/N co-doped catalytic nodes with high dispersity. Therein the optimization of electric field distribution and homogenization of adsorption-catalysis sites offer the multi-electron conversion reaction of polysulfides with excellent kinetics and stability. The resultant IRA-DC/S cathode enables a high areal capacity of 8.86 mAh cm-2 under ultra-high sulfur loading (13.1 mg cm-2) and lean electrolyte (8 mu L mgsulfur -1 ). It also displays a long-term cycling performance (1200 cycles at 1 C) and ultrahigh rate performance up to 20 C (with a capacity of 473.6 mAh g-1). This work provides an electrode building strategy by optimizing the environments of heterogeneous electrocatalysis and micro electric field to activate the polysulfide conversion efficiency and utilization of high-loading sulfur in monolithic sulfur-carbon cathodes.