Heterostructure of 2D MoSe_(2) nanosheets vertically grown on bowllike carbon for high-performance sodium storage  

作　　者：Nianxiang Shi Guangzeng Liu Baojuan Xi Xuguang An Changhui Sun Shenglin Xiong 

机构地区：[1]School of Chemistry and Chemistry Engineering,Qilu Normal University,Jinan 250200,China [2]School of Chemistry and Chemical Engineering,Shandong University,Jinan 250100,China [3]School of Mechanical Engineering,Chengdu University,Chengdu 610106,China

出　　处：《Nano Research》2024年第5期4023-4030,共8页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.U21A2077);the Taishan Scholar Project Foundation of Shandong Province(No.ts20190908);the Natural Science Foundation of Shandong Province(Nos.ZR2021ZD05,ZR2022QB200).

摘　　要：Transition metal dichalcogenides are attractive anode materials for sodium ion batteries(SIBs)due to their high theoretical capacity and large interlayer spacing.However,its practical application is hampered by the sluggish kinetics of Na^(+)insertion and structure collapse caused by Na^(+)insertion/deinsertion.Herein,the heterostructures of MoSe_(2) nanosheets vertically growing on bowl-like carbon(MoSe_(2)@C)are designed and prepared by a template method coupled with selenization treatment to boost storage sodium performance.The hollow and collapse could provide enough storage space for Na^(+)and alleviate the volume expansion during the charge/discharge processes.MoSe_(2) nanosheets vertically grown on carbon could expose more active sites for adsorbing Na^(+)to enhance the utilization rate of electrode materials.Moreover,building heterostructures by combining different phase components could facilitate Na^(+)diffusion and advance reaction kinetics.Benefiting from these merits,the bowl-like MoSe_(2)@C shows outstanding reversible capacity(356.8 mAh·g^(-1) after 1500 cycles at 1 A·g^(-1))and remarkable rate performance(249.9 mAh·g^(-1)10 A·g^(-1)).

关 键 词：MoSe_(2)nanosheets bowl-like carbon HETEROSTRUCTURE sodium ion batteries 

分 类 号：TB383[一般工业技术—材料科学与工程]