Confining MOF-derived SnSe nanoplatelets in nitrogen-doped graphene cages via direct CVD for durable sodium ion storage

查看全文 作　　者：Chen [1]Lu;Zhenzhu [1]Li;Zhou [1]Xia;Haina [1,2]Ci;Jingsheng [1]Cai;Yingze [1]Song;Lianghao [1]Yu;Wanjian [1]Yin;Shixue [3]Dou;Jingyu [1,2]Sun;Zhongfan [1,2,4]Liu

机构地区：[1]College of Energy,Soochow Institute for Energy and Materials Innovations(SIEMIS),Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province,Soochow University,Suzhou 215006,China;[2]Beijing Graphene Institute(BGI),Beijing 100095,China;[3]Institute for Superconducting and Electronic Materials,University of Wollongong,Wollongong,NSW 2522,Australia;[4]Center for Nanochemistry(CNC),Beijing Science and Engineering Center for Nanocarbons,Beijing National Laboratory for Molecular Sciences,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China

出　　处：《Nano Research》索引2019年第12卷第12期,共8页

基　　金：This work was supported by the National Natural Science Foundation of China(No.51702225);the National Key Research and Development Program(No.2016YFA0200103);Natural Science Foundation of Jiangsu Province(No.BK20170336).C.L.,乙乙L.,Z.X.,H.N.C.,Y.Z.S.,L.H.Y.,W.J.Y.,J.Y.S.,and Z.F.L.acknowledge the support from Suzhou Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies,Suzhou,China. 摘　　要：Tin-based compounds are deemed as suitable anode candidates affording promising sodium-ion storages for rechargeable batteries andhybrid capacitors.However,synergistically tailoring the electrical conductivity and structural stability of tin-based anodes to attain durablesodium-ion storages remains challenging to date for its practical applications.Herein,metal-organic framework(MOF)derived SnSe/C wrappedwithin nitrogen-doped graphene(NG@SnSe/C)is designed targeting durable sodium-ion storage.NG@SnSe/C possesses favorable electricalconductivity and structure stability due to the'inner'carbon framework from the MOF thermal treatment and'outer'graphitic cage from thedirect chemical vapor deposition synthesis.Consequently,NG@SnSe/C electrode can obtain a high reversible capacity of 650 mAh·g^-1 at 0.05 A·g^1,a favorable rate performance of 287.8 mAh·g^1 at 5 A·g^1 and a superior cycle stability with a negligible capacity decay of 0.016%percycle over 3,200 cycles at 0.4 A·g^1.Theoretical calculations reveal that the nitrogen-doping in graphene can stabilize the NG@SnSe/Cstructure and improve the electrical conductivity.The reversible Na-ion storage mechanism of SnSe is further investigated by in-situ X-raydiffraction/ex-s/tu transmission electron microscopy.Furthermore,assembled sodium-ion hybrid capacitor full-cells comprising our NG@SnSe/Canode and an active carbon cathode harvest a high energy/power density of 115.5 Wh·kg^-1/5,742 W·kg^-1,holding promise for next-generationen ergy storages. 关键词：SnSe nitrogervdoped GRAPHENE plasma-enhanced chemical vapor deposition conductivity sodium-ion STORAGE

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Confining MOF-derived SnSe nanoplatelets in nitrogen-doped graphene cages via direct CVD for durable sodium ion storage

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