In-situ embedding CoTe catalyst into 1D-2D nitrogen-doped carbon to didirectionally regulate lithium-sulfur batteries

查看全文 作　　者：Bin [1]Li;Peng [1]Wang;Baojuan [1]Xi;Ning [1]Song;Xuguang [2]An;Weihua [3]Chen;Jinkui [4]Feng;Shenglin [1]Xiong

机构地区：[1]Key Laboratory of Colloid and Interface Chemistry,Ministry of Education,School of Chemistry and Chemical Engineering,State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China;[2]Key Laboratory of Mechanical Engineering of Education,School of Mechanical Engineering,Chengdu University,Chengdu 610106,China;[3]Key Laboratory of Material Processing and Mold of Ministry of Education,Zhengzhou University,Zhengzhou 450001,China;[4]School of Materials Science and Engineering,Shandong University,Jinan 250061,China

出　　处：《Nano Research》索引2022年第15卷第10期,共11页

基　　金：supports provided by the National Natural Science Foundation of China(Nos.U21A2077 and 21971145);the Taishan Scholar Project Foundation of Shandong Province(No.ts20190908);the Natural Science Foundation of Shandong Province(Nos.ZR2021ZD05 and ZR2019MB024);Anhui Kemi Machinery Technology Co.,Ltd for providing a Teflonlined stainless steel autoclave. 摘　　要：Lithium-sulfur(Li-S)batteries have been widely investigated attributed to their advantages of high energy density and cost effectiveness.However,it is still limited by the uncontrolled shuttle effect of the sulfur cathode and the promiscuous dendrite growth over the lithium anode.To handle the above issues,the highly conductive CoTe catalyst is precisely loaded onto nitrogendoped nanotube and graphene-like carbon(CoTe NCGs),which is employed as a bi-functionally integrated host.On the lithium anode,the CoTe NCGs with excellent lithiophilic property effectively regulate the uniform deposition of lithium and achieve the effect of suppressing the disorderly growth of lithium dendrites.On the sulfur cathode,the electrochemical conversion of lithium polysulfides(LiPSs)is catalyzed to mitigate the notorious shuttle effect.In view of the bifunctionality of CoTe NCGs,the assembled full cell can be steadily stable even for 800 cycles at a high rate of 2 C,and the capacity decay rate is only 0.05%per cycle.The areal capacity of 6.0 mAh·cm^(−2) is well retained after 50 cycles under the conditions of high sulfur loading,poor electrolyte(a low electrolyte-to-sulfur ratio,E/S=4.2),and low negative to positive capacity ratio(N/P=1.6:1). 关键词：CoTe nanocrystals dual-functional shuttling effect lithium dendrite Li-S batteries

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In-situ embedding CoTe catalyst into 1D-2D nitrogen-doped carbon to didirectionally regulate lithium-sulfur batteries

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