Among various anode candidates for potassium-ion batteries,carbonaceous materials have attracted significant attention due to their overwhelming advantages including cost-effectiveness and environmental benignity.However,the inferior specific capacity and the sluggish reaction kinetics hinder the further development in this realm.Herein,we report biomass templated synthesis of boron/oxygen heteroatom co-doped carbon particles(BO-CPs)via direct plasma-enhanced chemical vapor deposition.With the combined advantages of abundant active sites,large accessible surface area,and functional groups,BO-CP anode exhibits high reversible specific capacity(426.5 mAh g-1 at 0.1 A g-1)and excellent rate performance(166.5 mAh g-1 at 5 A g-1).The K-ion storage mechanism is probed by operando Raman spectroscopy,ex situ X-ray photoelectron spectroscopy/electrochemical impedance spectroscopy,galvanostatic intermittent titration technique measurements,and theoretical simulations.The synergistic effect of boron and oxygen co-doping greatly facilitates the performance of carbon-based anode,wherein boron dopant improves the conductivity of carbon framework and the oxygen dopant affords ample active sites and thus harvests additional specific capacity.This work is anticipated to propel the development of high-performance anode materials for emerging energy storage devices.

Xueyu Lian;Zhongti Sun;Qingqing Mei;Yuyang Yi;Junhua Zhou;Mark H.Rümmeli;Jingyu Sun

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;Beijing Graphene Institute(BGI),Beijing 100095,China;Department of Chemistry,University of Manchester,Manchester M13 9PL,UK Prof.M.H.Rümmeli;Leibniz Institute for Solid State and Materials Research Dresden,P.O.Box 270116,Dresden D-01171,Germany;Centre of Polymer and Carbon Materials,Polish Academy of Sciences,M.Curie-Sklodowskiej 34,Zabrze 41-819,Poland;Institute of Environmental Technology,VSB-Technical University of Ostrava,17.Listopadu 15,Ostrava 708 33,Czech Republic

能源与环境材料（英文）

[1]Xueyu Lian;Zhongti Sun;Qingqing Mei;Yuyang Yi;Junhua Zhou;Mark H.Rümmeli;Jingyu Sun-.Biomass Template Derived Boron/Oxygen Co-Doped Carbon Particles as Advanced Anodes for Potassium-Ion Batteries)[J].能源与环境材料（英文）,2022(01):344-352

Biomass,Template,Derived,Boron,Oxygen,Co,Doped,Carbon,Particles,Advanced,Anodes,Potassium,Ion,Batteries,Among,various,anode,candidates,potassium,batteries,carbonaceous,materials,have,attracted,significant,attention,due,their,overwhelming,advantages,including,cost,effectiveness,environmental,benignity,However,inferior,specific,capacity,sluggish,reaction,kinetics,hinder,further,development,this,realm,Herein,report,biomass,templated,synthesis,boron,oxygen,heteroatom,doped,particles,BO,CPs,via,direct,plasma,enhanced,vapor,deposition,With,combined,abundant,active,sites,large,accessible,surface,area,functional,groups,exhibits,high,reversible,mAh,excellent,rate,performance,storage,mechanism,probed,by,operando,Raman,spectroscopy,situ,ray,photoelectron,electrochemical,impedance,galvanostatic,intermittent,titration,technique,measurements,theoretical,simulations,synergistic,doping,greatly,facilitates,wherein,dopant,improves,conductivity,framework,affords,ample,thus,harvests,additional,This,anticipated,propel,emerging,energy,devices

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