Gelation-pyrolysis strategy for fabrication of advanced carbon/sulfur cathodes for lithium-sulfur batteries  

作　　者：Feng Cao Chunxiang Xian Tianqi Yang Yue Zhang Haifeng Chen Xinping He Xukun Qian Shenghui Shen Yang Xia Wenkui Zhang Xinhui Xia 

机构地区：[1]Huzhou Key Laboratory of Green Energy Materials and Battery Cascade Utilization,School of Intelligent Manufacturing,Huzhou College,Huzhou 313000,China [2]College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou 310014,China [3]School of Materials Science&Engineering,Zhejiang University,Hangzhou 310027,China [4]School of Materials Science and&Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China

出　　处：《Chinese Chemical Letters》2025年第3期500-505,共6页中国化学快报(英文版)

基　　金：supported by National Natural Science Foundation of China(Nos.52372235,52073252,22379020,52002052,52302316);Science and Technology Department of Zhejiang Province(Nos.2023C01231,Q23E020046,LD22E020006,and LY21E020005);Zhejiang Provincial Postdoctoral Research Project(No.ZJ2023080);Key Research and Development Project of Science and Technology Department of Sichuan Province(No.2022YFSY0004).

摘　　要：The development of high-performance carbon-based composite hosts plays decisive roles in the electrochemistry of lithium sulfur batteries.Herein,a novel metal-ion induced gelation self-assembly technology is reported to construct sodium alginate carbon(SAC)based polar hierarchical carbon composites with cross-linked network architecture and in-situ co-grown cross-linked polar nanoparticles.Interestingly,it shows high versatility to an extensive array of materials including metals,alloys,and metallic oxides.As a representative,NiCo alloy nanoparticles are chosen to obtain the SAC/NiCo composite host for sulfur in LSBs,which possess superior physical/chemical adsorption capabilities and catalytic conversion kinetics to polysulfide in virtue of synergistic interaction between the hierarchical pore structures and NiCo catalyst.The designed SAC/NiCo-S cathode shows superior electrochemical performance with excellent rate capacity(2 C:693.5 mAh/g)and enhanced cycling stability(764.3 mAh/g at 0.1 C after 240 cycles).This work provides a straightforward approach for fabricating multifunctional carbon composites with adjustable component for advanced energy storage system.

关 键 词：Gelation-pyrolysis strategy Self-assembly Sodium alginate Bimetallic cross-link Lithium sulfur batteries 

分 类 号：TM912[电气工程—电力电子与电力传动]