Porous Carbon Architecture Assembled by Cross-Linked Carbon Leaves with Implanted Atomic Cobalt for High-Performance Li-S Batteries  

作　　者：Ruirui Wang Renbing Wu Chaofan Ding Ziliang Chen Hongbin Xu Yongfeng Liu Jichao Zhang Yuan Ha Ben Fei Hongge Pan 

机构地区：[1]Department of Materials Science,Fudan University,Shanghai 200433,People’s Republic of China [2]State Key Laboratory of Silicon Materials and School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,People’s Republic of China [3]Shanghai Synchrotron Radiation Facility,Zhangjiang Laboratory,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,People’s Republic of China [4]Institute of Science and Technology for New Energy,Xi’an Technological University,Xi’an 710021,People’s Republic of China

出　　处：《Nano-Micro Letters》2021年第10期98-112,共15页纳微快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Grant Nos.51871060,52071084 and 51831009);Recruit Program of Global Youth Experts and Fudan’s Undergraduate Research Opportunities Program(FDUROP)。

摘　　要：The practical application of lithium-sulfur batteries is severely hampered by the poor conductivity,polysulfide shuttle effect and sluggish reaction kinetics of sulfur cathodes.Herein,a hierarchi-cally porous three-dimension(3D)carbon architecture assembled by cross-linked carbon leaves with implanted atomic Co-N4 has been deli-cately developed as an advanced sulfur host through a SiO_(2)-mediated zeolitic imidazolate framework-L(ZIF-L)strategy.The unique 3D architectures not only provide a highly conductive network for fast electron transfer and buffer the volume change upon lithiation-delithi-ation process but also endow rich interface with full exposure of Co-N4 active sites to boost the lithium polysulfides adsorption and conversion.Owing to the accelerated kinetics and suppressed shuttle effect,the as-prepared sulfur cathode exhibits a superior electrochemical perfor-mance with a high reversible specific capacity of 695 mAh g^(−1) at 5 C and a low capacity fading rate of 0.053%per cycle over 500 cycles at 1 C.This work may provide a promising solution for the design of an advanced sulfur-based cathode toward high-performance Li-S batteries.

关 键 词：Single-atom Co 3D porous carbon architecture Cathode Lithium–sulfur battery 

分 类 号：TM912[电气工程—电力电子与电力传动]