典型文献
Highly active CoP-Co2N confined in nanocarbon enabling efficient electrocatalytic immobilizing-conversion of polysulfide targeting high-rate lithium-sulfur batteries
文献摘要：
Lithium-sulfur batteries suffer from poor cycling stability because of the intrinsic shuttling effect of inter-mediate polysulfides and sluggish reaction kinetics,especially at high rates and high sulfur loading.Herein,we report the construction of a CoP-Co2N@N-doped carbon polyhedron uniformly anchored on three-dimensional carbon nanotubes/graphene(CoP-Co2N@NC/CG)scaffold as a sulfur reservoir to achieve the trapping-diffusion-conversion of polysulfides.Highly active CoP-Co2N shows marvelous cat-alytic effects by effectively accelerating the reduction of sulfur and the oxidation of Li2S during the dis-charging and charging process,respectively,while the conductive NC/CG network with massive mesoporous channels ensures fast and continuous long-distance electron/ion transportation.DFT calcu-lations demonstrate that the CoP-Co2N with excellent intrinsic conductivity serves as job-synergistic immobilizing-conversion sites for polysulfides through the formation of P...Li/N...Li and Co...S bonds.As a result,the S@CoP-Co2N@NC/CG cathode(sulfur content 1.7 mg cm-2)exhibits a high capacity of 988 mAh g-1 at 2 C after 500 cycles,which is superior to most of the electrochemical performance reported.Even under high sulfur content(4.3 mg cm-2),it also shows excellent cyclability with high capacity at 1 C.
文献关键词：
中图分类号：
作者姓名：
Xiaojun Zhao;Tianqi Gao;Wenhao Ren;Chuan Zhao;Zhi-Hong Liu;Linbo Li
作者机构：
School of Metallurgical Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,Shaanxi,China;School of Chemistry and Chemical Engineering,Shaanxi Normal University,Xi'an 710062,Shaanxi,China;School of Chemistry,University of New South Wales,Sydney,NSW 2052,Australia
文献出处：
引用格式：
[1]Xiaojun Zhao;Tianqi Gao;Wenhao Ren;Chuan Zhao;Zhi-Hong Liu;Linbo Li-.Highly active CoP-Co2N confined in nanocarbon enabling efficient electrocatalytic immobilizing-conversion of polysulfide targeting high-rate lithium-sulfur batteries)[J].能源化学,2022(12):250-259
A类：
Co2N
B类：
Highly,active,CoP,confined,nanocarbon,enabling,efficient,electrocatalytic,immobilizing,conversion,targeting,high,lithium,sulfur,batteries,Lithium,suffer,from,poor,cycling,stability,because,intrinsic,shuttling,inter,mediate,polysulfides,sluggish,reaction,kinetics,especially,rates,loading,Herein,we,construction,doped,polyhedron,uniformly,anchored,three,dimensional,nanotubes,graphene,NC,CG,scaffold,reservoir,achieve,trapping,diffusion,shows,marvelous,effects,by,effectively,accelerating,reduction,oxidation,Li2S,during,charging,process,respectively,while,conductive,network,massive,mesoporous,channels,ensures,fast,continuous,long,distance,electron,transportation,DFT,calcu,lations,demonstrate,that,excellent,conductivity,serves,job,synergistic,sites,through,formation,bonds,result,cathode,content,exhibits,capacity,mAh,after,cycles,which,superior,most,electrochemical,performance,reported,Even,under,also,cyclability
AB值：
0.581518
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