Extraordinary Ultrahigh-Capacity and Long Cycle Life Lithium-Ion Batteries Enabled by Graphitic Carbon Nitride-Perylene Polyimide Composites
作者机构：Advanced Energy Materials Design LabSchool of Chemical EngineeringYeungnam University38541Gyeongsan-siKorea William G.Lowrie Chemical and Biomolecular EngineeringThe Ohio State UniversityColumbus OH 43210USA
出 版 物：《能源与环境材料（英文）》 (Energy & Environmental Materials)
年 卷 期：2023年第6卷第6期
页 面：199-226页
核心收录：
基 金：supported by the “Human Resources Program in Energy Technology” of the Korea Institute of Energy Technology Evaluation and Planning granted financial resources from the Ministry of Trade, Industry & Energy, Republic of Korea the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education, Republic of Korea
主 题：graphitic carbon nitride lithium-ion batteries organic electrode perylene polyimide semiconductor–metal heterojunction
摘 要：Graphitic carbon nitride(g-C3N4)is widely used in organic metal-ion batteries owing to its high porosity,facile synthesis,stability,and high-rate ***,pristine g-C3N4 nanosheets exhibit poor electrical conductivity,irreversible metal-ion storage capacity,and short-term cycling owing to their high concentration of graphitic-N ***,a series of 3,4:9,10-perylenetetracarboxylic diimide-coupled g-C3N4 composite anode materials,CN-PIx(x=0.2,0.5,0.75,and 1),was investigated,which exhibited an unusually high surface nitrogen content(23.19-39.92 at.％)and the highest pyridinic-N,pyrrolic-N,and graphitic-N contents reported to *** CN-PI1 anode delivers an unprecedented and continuously increasing ultrahigh discharging capacity of exceeding 8400 mAh g-1(1.96 mWh cm-2)at 100 mA g-1 with high specific energy density(Esp)of～7700 Wh kg-1 and the volumetric energy density(Ev)of～14956 Wh L-1 and an excellent long-term stability(414 mAh g-1 or 0.579 mWh cm-2 at 1 A g-1).Furthermore,the activation of the CN-PIx electrodes contributes to their superior electrochemical performance,resulting from the fact that the Li+is not only stored in the CN-PIx composites but also CN-PIx activated the Li0 adlayer on the CN-PI1-Cu heterojunction as an SEI layer to avoid the direct contact of Lio phase and the *** CN-PI1 full cell with LiCoO2 as the cathode delivers a discharge capacity of～587 mAh g-1 at a 1 A g-1 after 250 cycles with a Coulombic efficiency nearly 99％.This study provides a strategy to develop N-doped g-C3N4-based anode materials for realizing long-lasting energy storage devices.