Oxygenated carbon nitride-based high-energy-density lithium-metal batteries

作     者：Mengnan Shen Ying Wei Man Ge Shengdong Yu Ronghui Dou Liuhua Chen Feng Wang Yunhui Huang Henghui Xu 

作者机构：School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanChina School of Chemistry and Material ScienceHubei Engineering UniversityXiaoganChina 

出 版 物：《Interdisciplinary Materials》 (交叉学科材料（英文）)

年 卷 期：2024年第3卷第5期

页      面：791-800页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 08[工学] 10[医学] 

基　　金：National Key Research and Development Program of China,Grant/Award Number:2023YFB2503801 National Natural Science Foundation of China,Grant/Award Numbers:52302253,5202780089 Fundamental Research Funds for the Central Universities,Grant/Award Number:HUST:2172020kfyXJJS089 Key R&D Program of Hubei Province,Grant/Award Number:2023BAB028 Key Program of the National Natural Science Foundation of China,Grant/Award Number:52231009 

主　　题：additive lithium protection oxygenated carbon nitride polymer electrolytes 

摘      要：Lithium(Li)-metal batteries with polymer electrolytes are promising for high-energy-density and safe energy storage ***,current polymer electrolytes suffer either low ionic conductivity or inadequate ability to suppress Li dendrite growth at high current *** study addresses both issues by incorporating two-dimensional oxygenated carbon nitride(2D OCN)into a polyvinylidene fluoride(PVDF)-based composite polymer electrolyte and modifying the Li anode with *** OCN nanosheets incorporated PVDF electrolyte exhibits a high ionic conductivity(1.6×10^(-4)S cm^(-1)at 25℃)and Li+transference number(0.62),wide electrochemical window(5.3),and excellent fire ***,the OCN-modified Li anode in situ generates a protective layer of Li_(3)N during cycling,preventing undesirable reactions with PVDF electrolyte and effectively suppressing Li dendrite *** cells using the upgraded PVDF polymer electrolyte and modified Li anode demonstrate long cycling stability over 2500 h at 0.1 mA cm^(-2).Full cells with a high-voltage LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)cathode exhibit high energy density and long-term cycling stability,even at a high loading of 8.2 mg cm^(-2).Incorporating 2D OCN nanosheets into the PVDF-based electrolyte and Li-metal anode provides an effective strategy for achieving safe and high-energy-density Li-metal batteries.