Cobalt-embedded 3D conductive honeycomb architecture to enable high-sulphur-loading Li-S batteries under lean electrolyte conditions  

作　　者：Hui Pan Zhibin Cheng Jan Fransaer Jiangshui Luo Michael Wübbenhorst 

机构地区：[1]Laboratory for Soft Matter and Biophysics,Department of Physics and Astronomy,KU Leuven,Leuven 3001,Belgium [2]Fujian Key Laboratory of Polymer Materials,College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China [3]Department of Materials Engineering,KU Leuven,Leuven 3001,Belgium [4]Lab of Electrolytes and Phase Change Materials,College of Materials Science and Engineering,Sichuan University,Chengdu 610065,China

出　　处：《Nano Research》2022年第9期8091-8100,共10页纳米研究（英文版）

基　　金：M.W.and J.S.L.acknowledge the Research Foundation-Flanders(FWO)for a Research Project(No.G0B3218N)and a Research Grant(No.1529816N);J.S.L.,Z.B.C.,and M.W.acknowledge the financial support by the National Natural Science Foundation of China(Nos.21776120 and 22005054);H.P.is grateful to the China Scholarship Council.Funding from State Key Laboratory of Structural Chemistry,and the Natural Science Foundation of Fujian Province(No.2021J01149)is also acknowledged.

摘　　要：High sulphur loading and lean electrolyte conditions are important to achieve the high theoretical energy density of lithiumsulphur(Li-S)batteries.However,serious problems such as low sulphur utilization and fast capacity fade are typically experienced under low electrolyte/sulphur(E/S)ratios and high sulphur loading conditions.To address these issues,a cobaltcontaining three-dimensional conductive honeycomb(Co@N-HPC)is proposed in this work as a material for sulphur cathodes.The good electrical conductivity and high density of catalytic sites of(Co@N-HPC)allow fast redox kinetics of lithium polysulfide(LiPS)in high-sulphur-loading electrodes.In addition,the hierarchical structure and good wettability by the electrolyte of Co@NHPC facilitates electrolyte penetration and LiPS conversion,leading to a high utilization of sulphur under lean electrolyte conditions.Therefore,at a current density of 0.2 C,a volumetric capacity of 1,410 mAh·cm^(−3)was attained with a sulphur loading of 5.1 mg·cm^(−2)and an E/S ratio of 5μL·mg^(−1).This work provides ideas for the development of lean electrolyte Li-S batteries with a high sulphur loading.

关 键 词：honeycomb architecture cobalt nanoparticles high sulphur loading lean electrolyte lithium-sulphur battery 

分 类 号：TM912[电气工程—电力电子与电力传动]