Regulated adsorption-diffusion and enhanced charge transfer in expanded graphite cohered with N,B bridge-doping carbon patches to boost K-ion storage

作     者：Haiyan Wang Haowen Du Hucheng Zhang Songjie Meng Zhansheng Lu Hao Jiang Chunzhong Li Jianji Wang Haiyan Wang;Haowen Dua;Hucheng Zhang;Songjie Meng;Zhansheng Lu;Hao Jiang;Chunzhong Li;Jianji Wang

作者机构：Centre of Henan Province for Green Manufacturing of Fine ChemicalsKey Laboratory of Green Chemical Media and ReactionsMinistry of EducationSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiang 453007HenanChina Key Laboratory for Ultrafine Materials of Ministry of EducationShanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China School of PhysicsHenan Normal UniversityXinxiang 453007HenanChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2023年第76卷第1期

页      面：67-74,I0003页

核心收录：

学科分类：081704[工学-应用化学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(21573059 and U1704251) the Overseas Expertise Introduction Project for Discipline Innovation(D17007) the Natural Science Foundation of Henan Province(212300410178) 

主　　题：Heteroatom dual-doping Graphite anodes K-ion batteries Adsorption and diffusion energy Charge transfer 

摘      要：The great challenges are remained in constructing graphite-based anode with well built-in structures to accelerate kinetics and enhance stability in the advanced K-ion batteries(KIBs).Here,we firstly report the design of expanded graphite cohered by N,B bridge-doping carbon patches(NBEG)for efficient K-ion adsorption/diffusion and long-term *** is the B co-doping that plays a crucial role in maximizing doping-site utilization of N atoms,balancing the adsorption-diffusion kinetics,and promoting the charge transfer between NBEG and K ***,the robust lamellar structure,suitable interlayer distance,and rich active sites of the designed NBEG favor the rapid ion/electron transfer pathways and high K-ion storage ***,even at a low N,B doping concentration(4.36 at%,2.07 at%),NBEG anode shows prominent electrochemical performance for KIBs,surpassing most of the advanced carbon-based *** studies,density functional theory simulations,and in-situ Raman spectroscopy are further performed to reveal the K-ion storage mechanism and confirm the critical actions of co-doping *** work offers the new methods for graphite-electrode design and the deeper insights into their energy storage mechanisms in KIBs.