文献类型：期刊文献

英文题名：Micro-mesoporous carbon nanofibers loaded with sulfur as a self-supported cathode for high-performance Li-S batteries

作者：Zhao, Chunhua[1];Jiang, Wenbin[1];Sun, Nan[1];Cai, Wenlei[1];Li, Mingkun[1];Chen, Shi[1];Zhao, Chongjun[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Shanghai Key Lab Adv Polymer Mat,Minist Educ, Shanghai, Peoples R China

年份：2023

卷号：74

外文期刊名：JOURNAL OF ENERGY STORAGE

收录：;EI(收录号：20234414986060);WOS:【SCI-EXPANDED(收录号:WOS:001102637000001)】；

基金：We are grateful for the support of National Natural Science Foundation of China (22075082), Natural Science Foundation of Shanghai (No. 19ZR1413000, 13ZR1411900), Shanghai Alliance Plan (No. LM201881, LM201751), Shanghai Leading Academic Discipline Project (B502), and Shanghai Key Laboratory Project (08DZ2230500).

语种：英文

外文关键词：Li -S batteries; Carbon nanofiber; Small molecule sulfur; Self-supported

摘要：Self-supported carbon fibers with hierarchical porous structures regulated by zinc salt and copper salt were prepared through electrospinning technology, and sulfur loaded carbon fibers were obtained through sulfur vapor deposition method. Small molecular sulfur (S2-S4) and cyclic sulfur (S8) were encapsulated effectively in hierarchical pores by this way, both of them could run stably in carbonate electrolyte. Due to the threedimensional conductive structure and suitable pore structure of the carbon fibers, the self-supported S/MCNFZnCu cathode exhibits high capacity, excellent cycling stability and out-standing rate capacity. The reversible capacity after 100 cycles at 0.2 A g-1 based on the mass of cathode is 520 mAh g-1, corresponding to the capacity retention rate of 98.4 %. The reversible capacity after 1000 cycles at 1.0 A g-1 is 429 mAh g-1, with a capacity loss of approximately 0.01 % per cycle. Even at the sulfur loading of 4 mg cm-2, the cathode shows a stable capacity of nearly 500 mAh g-1 at 0.1 A g-1, provides a novel and efficient strategy for the next generation of high-performance batteries.