Deciphering the potential of potassium-ion batteries beyond room temperature  

超越室温工作的钾离子电池

作　　者：Weihao Xia Fengjun Ji Yunzhuo Liu Zhen Han Kaikai Li Jingyu Lu Wei Zhai Deping Li Lijie Ci 夏伟豪;吉凤君;刘耘卓;韩祯;李锴锴;陆敬予;翟伟;李德平;慈立杰

机构地区：[1]State Key Laboratory of Precision Welding&Joining of Materials and Structures,School of Materials Science and Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China [2]College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China [3]School of Science,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China [4]Department of Chemistry,City University of Hong Kong,Hong Kong 999077,China

出　　处：《Science Bulletin》2024年第21期3371-3383,共13页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China(52002094);Guangdong Basic and Applied Basic Research Foundation(2019A1515110756);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).

摘　　要：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.

关 键 词：Potassium-ion batteries Alloying-type anodes Interfacial engineering High-rate cyclability Wide-temperature applications 

分 类 号：TM912[电气工程—电力电子与电力传动]