Lithium-ion and solvent co-intercalation enhancing the energy density of fluorinated graphene cathode  

作　　者：Hao Wang Jie Jiang Pengyu Chen Zhenrui Wu Xiaobin Niu Chuying Ouyang Jian Liu Liping Wang 

机构地区：[1]School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,Sichuan,China [2]School of Engineering,Faculty of Applied Science,The University of British Columbia,Kelowna V1V 1V7,Canada [3]21C Innovation Laboratory,Contemporary Amperex Technology Ltd.(21C LAB),Ningde 352100,Fujian,China

出　　处：《Journal of Energy Chemistry》2024年第2期208-215,I0006,共9页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52072061,22322903,12174162);the Natural Science Foundation of Sichuan,China(No.2023NSFSC1914);21C Innovation Laboratory,Contemporary Amperex Technology Ltd.by project No.21C-OP-202103。

摘　　要：Fluorinated carbons CF_xhold the highest theoretical energy density(e.g.,2180 W h kg^(-1)when x=1)among all cathode materials of lithium primary batteries.However,the low conductivity and severe polarization limit it to achieve its theory.In this study,we design a new electrolyte,namely 1 M LiBF_(4)DMSO:DOL(1:9 vol.),achieving a high energy density in Li/CF_xprimary cells.The DMSO with a small molecular size and high donor number successfully solvates Li^(+)into a defined Li^(+)-solvation structure.Such solvated Li^(+)can intercalate into the large-spacing carbon layers and achieve an improved capacity.Consequently,when discharged to 1.0 V,the CF_(1.12)cathode demonstrates a specific capacity of 1944 m A h g^(-1)with a specific energy density of 3793 W h kg^(-1).This strategy demonstrates that designing the electrolyte is powerful in improving the electrochemical performance of CF_(x) cathode.

关 键 词：Fluorinated carbon Conversion reaction High-energy-density primary battery Li^(+)-solvation structure Solvent co-intercalation 

分 类 号：TM912[电气工程—电力电子与电力传动]