Ultrahigh “Relative Energy Density” and Mass Loading of Carbon Cloth Anodes for K-Ion Batteries

作     者：Junpeng Xie Jinliang Li Xiaodan Li Hang Lei Wenchen Zhuo Xibo Li Guo Hong Kwun Nam Hui Likun Pan Wenjie Mai 

作者机构：Siyuan LaboratoryGuangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New MaterialsDepartment of PhysicsJinan UniversityGuangzhou 510632 Institute of Applied Physics and Materials Engineering(IAPME)University of Macao.Department of Physics and ChemistryFaculty of Science and TechnologyUniversity of MacaoMacao SAR 999078 Department of ChemistryJinan UniversityGuangzhou 510632 Shanghai Key Laboratory of Magnetic ResonanceSchool of Physics and Electronic ScienceEast China Normal UniversityShanghai 200062 

出 版 物：《CCS Chemistry》 (中国化学会会刊（英文）)

年 卷 期：2021年第3卷第2期

页      面：791-799页

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：supports from the National Natural Science Foundation of China(51702056 and 51772135) the Ministry of Education of China(6141A02022516),China Postdoctoral Science Foundation(2017M622902 and 2019T120790) funding from the University of Macao(SRG2016-00092-IAPME,MYRG2018-00079-IAPME,and MYRG2019-00115IAPME) the Science and Technology Development Fund,Macao SAR(FDCT081/2017/A2,FDCT0059/2018/A2,and FDCT009/2017/AMJ) 

主　　题：acidized carbon clothes relative energy density high mass loading operando Raman spectra,K-ion batteries 

摘      要：Mass loading and potential plateau are the two most important issues of potassium(K)-ion batteries(KIBs),but they have long been ignored in previous ***,we report a simple and scalable method to fabricate acidized carbon clothes(A-CC)as high mass loading(13.1 mg cm−2)anode for KIBs,which achieved a reversible areal-specific capacity of 1.81 mAh cm−2 at 0.2 mA cm−***,we have proposed the concept of“relative energy densityto reasonably evaluate the electrochemical performance of the *** to our calculation method,the A-CC electrode exhibited an ultrahigh relative energy density of 46 Wh m−2 in the initial charge process and remained at 40 Wh m−2 after 50 ***,we performed the operando Raman spectroscopy(ORS)to investigate the K-ion storage *** believe that our work might provide a new guideline for the evaluation of anode performance,thereby,opening an avenue for the development of commercial anode.