典型文献
Unraveling structure evolution failure mechanism in MoS2 anode for improving lithium storage stability
文献摘要：
2H phase molybdenum disulfide(2H-MoS2)possesses the two-dimensional layered structure and high theoretical capacity,presenting excellent lithiation-delithiation property.However,the violent capacity decay within dozens of cycles still remains a great challenge due to lacking of in-depth failure mech-anism.Herein,a novel decay-recovery-decay failure phenomenon upon long-term cycles is reported for the first time,which originates from the slow size change of Mo nanoparticles(NPs).Decay stages are triggered by many irregular-shaped Mo NPs with the increasing size up to～15 nm,leading to prominent pseudocapacitance failure and capacity loss.Subsequent recovery stages are attributed to the pulveriza-tion of coarse Mo NPs through surface sulfurization and accompanying lithiation.To overcome the insta-bility issue,proper modifiers should be introduced to restrain the spontaneous growth of Mo NPs,such as aluminum oxide(Al2O3).The strong Mo-Al2O3 bond gradually"drags"Al2O3 fragments into the active material as the cycle continuously proceeds,resulting in the efficient refinement and the reversible con-version between Mo and MoS2.Therefore,the enhanced cycling stability and the capacity retention are successfully achieved.It is expected to provide a new insight into the energy storage of transition metal chalcogenide anode materials in rechargeable batteries.
文献关键词：
中图分类号：
作者姓名：
Guannan Zu;Shiyu Xu;Changhao Wang;Hongyi Li;Manchen Zhang;Xiaoxing Ke;Yuxiang Hu;Ruzhi Wang;Jinshu Wang
作者机构：
Key Laboratory of Advanced Functional Materials of Education Ministry of China,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China;Beijing Key Laboratory of Microstructure and Properties of Solids,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China
文献出处：
引用格式：
[1]Guannan Zu;Shiyu Xu;Changhao Wang;Hongyi Li;Manchen Zhang;Xiaoxing Ke;Yuxiang Hu;Ruzhi Wang;Jinshu Wang-.Unraveling structure evolution failure mechanism in MoS2 anode for improving lithium storage stability)[J].材料科学技术（英文版）,2022(33):245-253
A类：
pulveriza
B类：
Unraveling,structure,evolution,failure,mechanism,MoS2,anode,improving,lithium,storage,stability,2H,phase,molybdenum,disulfide,possesses,two,dimensional,layered,high,theoretical,capacity,presenting,excellent,delithiation,property,However,violent,decay,within,dozens,cycles,still,remains,great,challenge,due,lacking,depth,Herein,novel,recovery,phenomenon,upon,long,term,reported,first,which,originates,from,slow,size,change,nanoparticles,NPs,Decay,stages,are,triggered,by,many,irregular,shaped,increasing,leading,prominent,pseudocapacitance,loss,Subsequent,attributed,coarse,through,surface,sulfurization,accompanying,To,overcome,insta,issue,modifiers,should,introduced,restrain,spontaneous,growth,such,aluminum,oxide,Al2O3,strong,bond,gradually,drags,fragments,into,active,continuously,proceeds,resulting,efficient,refinement,reversible,version,between,Therefore,enhanced,cycling,retention,successfully,achieved,It,expected,provide,new,insight,energy,transition,metal,chalcogenide,materials,rechargeable,batteries
AB值：
0.654737
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