Insights into Enhanced Capacitive Behavior of Carbon Cathode for Lithium Ion Capacitors: The Coupling of Pore Size and Graphitization Engineering

作     者：Kangyu Zou Peng Cai Baowei Wang Cheng Liu Jiayang Li Tianyun Qiu Guoqiang Zou Hongshuai Hou Xiaobo Ji Kangyu Zou;Peng Cai;Baowei Wang;Cheng Liu;Jiayang Li;Tianyun Qiu;Guoqiang Zou;Hongshuai Hou;Xiaobo Ji

作者机构：College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083People’s Republic of China College of Metallurgy and Chemical EngineeringJiangxi University of Science and Technology86 Hongqi RoadGanzhou 341000People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2020年第12卷第9期

页      面：239-257页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 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] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 070301[理学-无机化学] 0702[理学-物理学] 

基　　金：financially supported by National Key Research and Development Program of China(2018YFC1901605) the National Postdoctoral Program for Innovative Talents(BX201600192) Hunan Provincial Science and Technology Plan(2017TP1001) Innovation Mover Program of Central South University(GCX20190893Y) 

主　　题：Carbon materials Pore size regulation Graphitization Capacitive behavior Lithium ion capacitor 

摘      要：The lack of methods to modulate intrinsic textures of carbon cathode has seriously hindered the revelation of in-depth relationship between inherent natures and capacitive behaviors,limiting the advancement of lithium ion capacitors(LICs).Here,an orientateddesigned pore size distribution(range from 0.5 to 200 nm)and graphitization engineering strategy of carbon materials through regulating molar ratios of Zn/Co ions has been proposed,which provides an effective platform to deeply evaluate the capacitive behaviors of carbon ***,after the systematical analysis cooperating with experimental result and density functional theory calculation,it is uncovered that the size of solvated PF6-ion is about 1.5 ***,the capacitive behaviors of carbon cathode could be enhanced attributed to the controlled pore size of 1.5-3 *** with synergistic effect of graphitization and appropriate pore size distribution,optimized carbon cathode(Zn90Co10-APC)displays excellent capacitive performances with a reversible specific capacity of^50 mAh g-1at a current density of 5 A ***,the assembly pre-lithiated graphite(PLG)//Zn90Co10-APC LIC could deliver a large energy density of 108 Wh kg-1 and a high power density of 150,000 W kg-1 as well as excellent long-term ability with 10,000 *** elaborate work might shed light on the intensive understanding of the improved capacitive behavior in LiPF6 electrolyte and provide a feasible principle for elaborate fabrication of carbon cathodes for LIC systems.