Zinc-ion batteries(ZIBs)possess great advantages in terms of high safety and low cost,and are regarded as promising alternatives to lithium-ion batteries(LIBs).However,limited by the electrochemical kinetics and structural stability of the typical cathode materials,it is still difficult to simultaneously achieve high rates and high cycling stability for ZIBs.Herein,we present a manganese oxide(SnxMnO2/SnO2)material that is dual-modified by SnO2/MnO2 heterostructures and pre-intercalated Sn4+cations as the cathode material for ZIBs.Such modification provides sufficient hetero-interfaces and expanded interlayer spac-ing in the material,which greatly facilitates the insertion/extraction of Zn2+.Meanwhile,the"structural pillars"of Sn4+cations and the"pinning effect"of SnO2 also structurally stabilizes the MnO2 species dur-ing the repeated Zn2+insertion/extraction,leading to ultra-high cycling stability.Due to these merits,the SnxMnO2/SnO2 cathode exhibits a high reversible capacity of 316.1 mAh g-1 at 0.3 A g-1,superior rate capability of 179.4 mAh g-1 at 2 A g-1,and 92.4％capacity retention after 2000 cycles.Consequently,this work would provide a promising yet efficient strategy by combining heterostructures and cations pre-intercalation to obtain high-performance cathodes for ZIBs.

Song Wang;Weibing Ma;Zhiyuan Sang;Feng Hou;Wenping Si;Jingdong Guo;Ji Liang;De'an Yang

Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education,School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China

能源化学

[1]Song Wang;Weibing Ma;Zhiyuan Sang;Feng Hou;Wenping Si;Jingdong Guo;Ji Liang;De'an Yang-.Dual-modification of manganese oxide by heterostructure and cation pre-intercalation for high-rate and stable zinc-ion storage)[J].能源化学,2022(04):82-91

SnxMnO2,Sn4+cations,spac,Zn2+insertion

Dual,modification,manganese,oxide,by,intercalation,high,stable,zinc,storage,Zinc,batteries,ZIBs,possess,advantages,terms,safety,low,cost,are,regarded,as,promising,alternatives,lithium,LIBs,However,limited,electrochemical,kinetics,stability,typical,materials,still,difficult,simultaneously,achieve,rates,cycling,Herein,present,SnO2,that,dual,modified,heterostructures,intercalated,Such,provides,sufficient,interfaces,expanded,interlayer,which,greatly,facilitates,extraction,Meanwhile,pillars,pinning,effect,also,structurally,stabilizes,species,dur,repeated,leading,ultra,Due,these,merits,exhibits,reversible,capacity,mAh,superior,capability,retention,after,cycles,Consequently,this,work,would,yet,efficient,strategy,combining,obtain,performance,cathodes

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