Synthesis of a class of oxocarbons(C_(4)O_(4),C_(5)O_(5))and the application as high-capacity cathode materials for lithium-ion batteries

作     者：Xuesen Hou Yong Lu Youxuan Ni Dongmei Zhang Qing Zhao Jun Chen 

作者机构：Frontiers Science Center for New Organic MatterKey Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2023年第66卷第10期

页      面：2780-2784页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the National Key R&D Program of China(2022YFB2402200) the National Natural Science Foundation of China(21905143,22121005,22020102002,21835004) Frontiers Science Center for New Organic Matter of Nankai University(63181206) 

主　　题：oxocarbons C_(4)O_(4) C_(5)O_(5) organic cathode lithium-ion batteries 

摘      要：Oxocarbons(C_(n)O_(n),n=3,4,5,6,...)are a series of compounds that are only composed of carbonyl *** highly electrophilic carbon atoms in C_(n)O_(n)make their poor stability toward H_(2)O,and thus the synthesis of C_(n)O_(n)is very *** an oxidation-dehydration method is developed to successfully synthesize C_(4)O_(4)and C_(5)O_(5).The combination of nuclear magnetic resonance(^(13)C NMR,^(1)H NMR),mass spectra,and infrared spectra unambiguously proves the exact chemical structure of C_(4)O_(4)and C_(5)O_(5).When used as a cathode material in lithium-ion batteries(LIBs),C_(5)O_(5)could deliver a high discharge capacity of 698m Ah g-1(corresponding to an energy density of 1,256 Wh kg-1C_(5)O_(5)).Furthermore,ex-situ infrared spectra and density functional theory(DFT)calculations demonstrate that the carbonyl groups are redox active sites during discharge and charge *** work paves the way to achieve the synthesis and battery application of oxocarbons.