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

扫码查看

原文链接

NETL
NSTL
万方数据

外文摘要：Fluorinated carbons CFx hold the highest theoretical energy density(e.g.,2180 W h kg-1when 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 LiBF4 DMSO:DOL(1:9 vol.),achieving a high energy density in Li/CFx primary 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 CF1.12 cathode demonstrates a specific capacity of 1944 mA h g-1 with a specific energy density of 3793 W h kg 1.This strategy demonstrates that design-ing the electrolyte is powerful in improving the electrochemical performance of CFx cathode.

外文关键词：

Fluorinated carbonConversion reactionHigh-energy-density primary batteryLi+-solvation structureSolvent co-intercalation

作者：

Hao Wang、Jie Jiang、Pengyu Chen、Zhenrui Wu、Xiaobin Niu、Chuying Ouyang、Jian Liu、Liping Wang

展开 >

作者单位：

School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,Sichuan,China

School of Engineering,Faculty of Applied Science,The University of British Columbia,Kelowna V1V 1V7,Canada

21C Innovation Laboratory,Contemporary Amperex Technology Ltd.(21C LAB),Ningde 352100,Fujian,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Sichuan,China21C Innovation Laboratory,Contemporary Amperex Technology Ltd

项目编号：

5207206122322903121741622023NSFSC191421C-OP-202103

出版年：

2024

DOI：

10.1016/j.jechem.2023.10.019

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.89(2)

参考文献量57