典型文献
Tandem Co-O dual sites on halloysite with promoted reaction kinetics for sulfur reduction
文献摘要：
Facilitating sulfur reduction reaction(SRR)is a promising pathway to tackle the polysulfide shuttle effect and enhance the electrochemical performance of lithium-sulfur(Li-S)batteries.Catalysts with a solo active site can reduce a reaction barrier of a certain transition-intermediate,but the linear scaling rela-tionship between multi-intermediates still obstructs overall SRR.Herein,we construct tandem Co-O dual sites with accelerating SRR kinetics by loading highly dispersed cobalt sulfide clusters on halloysite.This catalyst features Co with upshifted d-orbital and O with downshifted p-orbital,which cooperatively adsorb long-chain polysulfide and dissociate an S-S bond,thus achieving both optimal adsorption-des-orption strength and reduced conversion energy barrier of multi-intermediates in SRR.The Li-S coin bat-teries using the electrocatalyst endows a high specific capacity of 1224.3 mAh g-1 at 0.2 C after 200 cycles,and enhances cycling stability with a low-capacity decay rate of 0.03％per cycle at 1 C after 1000 cycles.Moreover,the strategy of the tandem Co-O dual sites is further verified in a practical Li-S pouch battery that realizes 1014.1 mAh g-1 for 100 cycles,which opens up a novel avenue for designing electrocatalysts to accelerate multi-step reactions.
文献关键词：
中图分类号：
作者姓名：
Qiang Zhang;Yinyin Qian;Ji-Jun Zou;Ruijie Gao;Huaming Yang
作者机构：
Hunan Key Laboratory of Mineral Materials and Application,School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China;Engineering Research Center of Nano-Geomaterials of Ministry of Education,China University of Geosciences,Wuhan 430074,Hubei,China;Faculty of Materials Science and Chemistry,China University of Geosciences,Wuhan 430074,Hubei,China;Key Laboratory for Green Chemical Technology of the Ministry of Education,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;Key Laboratory of Functional Geomaterials in China Nonmetallic Minerals Industry,China University of Geosciences,Wuhan 430074,Hubei,China
文献出处：
引用格式：
[1]Qiang Zhang;Yinyin Qian;Ji-Jun Zou;Ruijie Gao;Huaming Yang-.Tandem Co-O dual sites on halloysite with promoted reaction kinetics for sulfur reduction)[J].能源化学,2022(12):486-493
A类：
obstructs
B类：
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AB值：
0.596754
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