文献类型：期刊文献

英文题名：Promoting the synergistic effect of sulfur immobilization and polysulfides trapping by nitrogen functionalized interconnected hollow carbon nanocages for high-performance lithium-sulfur batteries

作者：Ma, Cheng[1,2,3];Zheng, Zhufeng[1];Jia, Xianfeng[1,4];Liu, Xiaojun[1];Wang, Jitong[1,2];Qiao, Wenming[1,2];Ling, Licheng[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Minist Educ, Key Lab Specially Funct Polymer Mat & Related Tec, Chem Engn, Shanghai 200237, Peoples R China;[3]Chinese Acad Sci, Inst Coal Chem, CAS Key Lab Carbon Mat, Taiyuan 030001, Peoples R China;[4]Tangshan Normal Univ, Dept Chem, Tangshan 063000, Peoples R China

年份：2021

卷号：486

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20205209694977);WOS:【SCI-EXPANDED(收录号:WOS:000608783600003)】；

基金：This work is partly supported by the National Natural Science Foundation of China (No. U1710252, 21978097), the Young Elite Scientists Sponsorship Program by CAST (2017QNRC001), CAS Key Laboratory of Carbon Materials (No: KLCMKFJJ2001), the Fundamental Research Funds for the Central Universities (222201817001, 50321041918013, 50321042017001) and the Shanghai Rising Star Program (17QB1401700).

语种：英文

外文关键词：Hollow carbon nanocages; Nitrogen doping; Polysulfide conversion; Lithium-sulfur battery

摘要：Although lithium sulfur battery is considered as one of the promising energy storage systems beyond lithium ion battery, the severe polysulfides dissolution and sluggish reaction kinetics with low level sulfur loading still retard the practical application of lithium sulfur battery. Herein, an interconnected hollow carbon nanocages with tailored nitrogen-doping (CNCs) is reported via confined pyrolysis of Zn, Co zeolitic imidazolate framework within the resorcinol-melamine-formaldehyde shell. The interconnected cavity and the porous carbon skeletons guarantee the well-dispersion and immobilization of sulfur cathode even with high sulfur content of 80 wt %. In addition, developed microporosity and numerous nitrogen functional groups on the carbon surface favor for the chemisorption, conversion of polysulfide and uniform growth of Li2S. Hence, the resulting S/CNC-1 cathode delivers a high initial capacity of 1310 mAh g(-1)@0.2 C, excellent rate performance with 762 mAh g(-1) at 8 C and ultra-long lifespan with a reversible capacity of 841 mAh g(-1) after 800 cycles. More importantly, a high capacity of 4.8 mAh cm(-2) is attained at high sulfur content of 80 wt% and areal sulfur loading of 4.2 mg cm(-2). These findings provide an effective method for future development of practical lithium sulfur battery with superior rate performance and long lifespan.