Alloying-type anode materials are considered promising candidates for next-generation alkali-ion batteries.However,they face significant challenges owing to severe volume variations and sluggish kinetics,which hinder t...Alloying-type anode materials are considered promising candidates for next-generation alkali-ion batteries.However,they face significant challenges owing to severe volume variations and sluggish kinetics,which hinder their practical applications.To address these issues,we propose a universal synthetic strategy,which can realize the facile synthesis of various alloying-type anode materials composed of a porous carbon matrix with uniformly embedded nanoparticles(Sb,Bi,or Sn).Besides,we construct the interactions among active materials,electrolyte compositions,and the resulting interface chemistries.This understanding assists in establishing balanced kinetics and stability.As a result,the fabricated battery cells based on the above strategy demonstrate high reversible capacity(515.6 mAh g1),long cycle life(200 cycles),and excellent high-rate capability(at 5.0 C).Additionally,it shows improved thermal stability at 45 and 60C.Moreover,our alloying-type anodes exhibit significant potential for constructing a 450 Wh kg1 battery system.This proposed strategy could boost the development of alloying-type anode materials,aligning with the future demands for low-cost,high stability,high safety,wide-temperature,and fast-charging battery systems.展开更多
基金supported by the National Natural Science Foundation of China(52002094)Guangdong Basic and Applied Basic Research Foundation(2019A1515110756)+1 种基金Shenzhen Science and Technology Program(JCYJ20210324121411031,JSGG202108021253804014,RCBS 20210706092218040,GXWD20221030205923001,and GXWD20201230155427003-20200824103000001)State Key Laboratory of Precision Welding&Joining of Materials and Structures(Nos.24-Z-17,24-T-08).
文摘Alloying-type anode materials are considered promising candidates for next-generation alkali-ion batteries.However,they face significant challenges owing to severe volume variations and sluggish kinetics,which hinder their practical applications.To address these issues,we propose a universal synthetic strategy,which can realize the facile synthesis of various alloying-type anode materials composed of a porous carbon matrix with uniformly embedded nanoparticles(Sb,Bi,or Sn).Besides,we construct the interactions among active materials,electrolyte compositions,and the resulting interface chemistries.This understanding assists in establishing balanced kinetics and stability.As a result,the fabricated battery cells based on the above strategy demonstrate high reversible capacity(515.6 mAh g1),long cycle life(200 cycles),and excellent high-rate capability(at 5.0 C).Additionally,it shows improved thermal stability at 45 and 60C.Moreover,our alloying-type anodes exhibit significant potential for constructing a 450 Wh kg1 battery system.This proposed strategy could boost the development of alloying-type anode materials,aligning with the future demands for low-cost,high stability,high safety,wide-temperature,and fast-charging battery systems.
