Lithium(Li)metal batteries have attracted much attention owing to its ultra-high energy density.However,as important part of Li metal batteries,Li anodes still face many challenges,mainly including uncontrolled dendritic Li formation,dramatical volume variation and serious pulverization.Herein,man-ganese dioxide(MnO2)nanosheet modified nitrogen(N),phosphorus(P)co-doping carbon nanofibers(NPC)on carbon cloth(CC)(MnO2@NPC-CC)is successfully fabricated through electrodeposition approach and further treated with Li by the molten-infusion method to prepare Li based Mn@NPC-CC(Li-Mn@NPC-CC)electrode.The synergy of MnO2 and NPC obviously increases the reaction rate between MnO2@NPC-CC and Li and guides even Li distribution over infusion process.Additionally,theoretical cal-culation,simulation and experimental results further indicate that N,P,Mn multi-doping effectively improves the superior lithiophilicity of Li-Mn@NPC-CC,which induces uniform Li deposition/dissolution to suppress dendrite growth over cycles.Moreover,conductive and porous NPC matrix not only effec-tively improves the stability of Li-Mn@NPC-CC,but also provides abundant spaces to accelerate the trans-fer of ion/electron and buffer electrode dimension variation during cycling.Hence,Li-Mn@NPC-CC-based symmetric cells exhibit extra-long cycling life(over 2200 h)with small hysteresis of 20 mV.When the Li-Mn@NPC-CC anode couples with air,Li iron phosphate(LiFePO4),or hard carbon(C)cathode,the assem-bled full cells exhibit outstanding performance with low hysteresis and stable cycling properties.Especially,the corresponding pouch-typed Li-air cells also exhibit good performance at different bending angles and even power a series of electronic devices.

Xiaoqiang Liu;Qian Zhang;Yiru Ma;Zhenzhen Chi;Huixiang Yin;Jie Liu;Junfei Huang;Ziyang Guo;Lei Wang

Key Laboratory of Eco-chemical Engineering,Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology,College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China;Key Laboratory of Eco-chemical Engineering,Taishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and Technology,College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China;Shimadzu(China)Co.,Ltd.,Shenzhen Branch,Shenzhen 518000,Guangdong,China;Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),College of Chemistry,Nankai University,Tianjin 300071,China;College of Environment and Safety Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China

能源化学

[1]Xiaoqiang Liu;Qian Zhang;Yiru Ma;Zhenzhen Chi;Huixiang Yin;Jie Liu;Junfei Huang;Ziyang Guo;Lei Wang-.MnO2 nanosheet modified N,P co-doping carbon nanofibers on carbon cloth as lithiophilic host to construct high-performance anodes for Li metal batteries)[J].能源化学,2022(06):270-281

dramatical,ganese,lithiophilicity

MnO2,nanosheet,modified,doping,carbon,nanofibers,cloth,host,construct,high,performance,anodes,metal,batteries,Lithium,have,attracted,much,attention,owing,its,ultra,energy,density,However,important,part,still,face,many,challenges,mainly,including,uncontrolled,dendritic,formation,volume,variation,serious,pulverization,Herein,dioxide,nitrogen,phosphorus,NPC,CC,successfully,fabricated,through,electrodeposition,approach,further,treated,by,molten,infusion,method,prepare,synergy,obviously,increases,reaction,between,guides,even,distribution,process,Additionally,theoretical,culation,simulation,experimental,results,indicate,that,multi,effectively,improves,superior,which,induces,uniform,dissolution,suppress,dendrite,growth,cycles,Moreover,conductive,porous,matrix,not,only,stability,also,provides,abundant,spaces,accelerate,trans,buffer,dimension,during,cycling,Hence,symmetric,cells,exhibit,extra,long,life,small,hysteresis,mV,When,couples,air,iron,phosphate,LiFePO4,hard,cathode,assem,bled,outstanding,low,stable,properties,Especially,corresponding,pouch,typed,good,different,bending,angles,power,series,electronic,devices

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