典型文献
Surface modification of hollow capsule by Dawson-type polyoxometalate as sulfur hosts for ultralong-life lithium-sulfur batteries
文献摘要：
Reasonable construction of sulfur host with high conductivity,large sulfur storage gap,strong chemical adsorption,and fast oxidation-reduction kinetics of polysulfide is very significant for its practical use in lithium-sulfur batteries(LSBs).In this paper,the surface modification of MIL-88A(Fe)is carried out by Dawson-type polyoxometalate(POM),and a hollow capsule shell material with P2W18,Fe3O4,and C components is synthesized by the subsequent carbonization process.When applied as the sulfur host,the hollow capsule shell material can efficiently improve the conductivity of sulfur electrode and restrain the volumetric change of active sulfur while charging and discharging.On this foundation,electrochem-ical analysis and density functional theory(DFT)calculation show that the P2W18 on the outer layer of the capsule shell have effective electrocatalytic activity and potent chemical bond on the lithium poly-sulfides(LiPSs),which is helpful to block the shuttle effect.Therefore,the as-assembled LSBs display the outstanding specific capacity and prominent cycle stability.Specifically,it delivers an excellent re-versible capacity of 1063 mAh/g after 100 cycles of charge-discharge at a rate of 0.5 C,accounting for a preservation by 96％in comparison to that of the initial cycle.Moreover,even after 2000 cycles at 1 C,the reversible specific capacity of 585 mAh/g can still be maintained with an average decay rate of only 0.021％.
文献关键词：
中图分类号：
作者姓名：
Mingliang Wang;Di Yin;Yundong Cao;Xinyang Dong;Guanggang Gao;Xun Hu;Cheng Jin;Linlin Fan;Jian Yu;Hong Liu
作者机构：
School of Materials Science and Engineering,Collaborative Innovation Center of Metal Nanoclusters&Photo/Electro-Catalysis and Sensing,University of Jinan,Ji'nan 250022,China
文献出处：
引用格式：
[1]Mingliang Wang;Di Yin;Yundong Cao;Xinyang Dong;Guanggang Gao;Xun Hu;Cheng Jin;Linlin Fan;Jian Yu;Hong Liu-.Surface modification of hollow capsule by Dawson-type polyoxometalate as sulfur hosts for ultralong-life lithium-sulfur batteries)[J].中国化学快报（英文版）,2022(09):4350-4356
A类：
P2W18
B类：
Surface,modification,hollow,capsule,by,Dawson,type,polyoxometalate,sulfur,hosts,ultralong,life,lithium,batteries,Reasonable,construction,high,conductivity,large,storage,gap,strong,chemical,adsorption,fast,oxidation,reduction,kinetics,polysulfide,very,significant,its,practical,use,LSBs,In,this,paper,surface,MIL,88A,carried,POM,shell,material,Fe3O4,components,synthesized,subsequent,carbonization,process,When,applied,efficiently,improve,electrode,restrain,volumetric,change,active,while,discharging,On,foundation,electrochem,analysis,density,functional,theory,DFT,calculation,show,that,outer,layer,have,effective,electrocatalytic,activity,potent,bond,sulfides,LiPSs,which,helpful,block,shuttle,Therefore,assembled,display,outstanding,specific,capacity,prominent,stability,Specifically,delivers,excellent,mAh,after,cycles,discharge,rate,accounting,preservation,comparison,initial,Moreover,even,reversible,still,be,maintained,average,decay,only
AB值：
0.576253
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