文献类型：期刊文献

中文题名：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[1];Haowen Du[1];Hucheng Zhang[1];Songjie Meng[3];Zhansheng Lu[3];Hao Jiang[2];Chunzhong Li[2];Jianji Wang[1]

机构：[1]Centre of Henan Province for Green Manufacturing of Fine Chemicals,Key Laboratory of Green Chemical Media and Reactions,Ministry of Education,School of Chemistry and Chemical Engineering,Henan Normal University,Xinxiang 453007,Henan,China;[2]Key Laboratory for Ultrafine Materials of Ministry of Education,Shanghai Engineering Research Center of Hierarchical Nanomaterials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;[3]School of Physics,Henan Normal University,Xinxiang 453007,Henan,China

年份：2023

期号：1

起止页码：67

中文期刊名：Journal of Energy Chemistry

外文期刊名：能源化学（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2023_2024】；

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)。

语种：英文

中文关键词：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 durability.It 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 ions.Especially,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 capacity.Consequently,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 anodes.Kinetic 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 B.This work offers the new methods for graphite-electrode design and the deeper insights into their energy storage mechanisms in KIBs.