A Self-Supporting Covalent Organic Framework Separator with Desolvation Effect for High Energy Density Lithium Metal Batteries

时间:2022-04-13作者:浏览量:63


A Self-Supporting Covalent Organic Framework Separator with Desolvation Effect for High Energy Density Lithium Metal Batteries

作者:

Yang, Y (Yang, Yan) [1] , [2] ; Yao, SY (Yao, Shiyan) [1] , [2] ; Liang, ZW (Liang, Ziwei) [1] , [2] ; Wen, YC (Wen, Yucheng) [1] , [2] ; Liu, ZB (Liu, Zhengbo) [1] , [2] ; Wu, YW (Wu, Yiwen) [1] , [2] ; Liu, J (Liu, Jun) [1] , [2] ; Zhu, M (Zhu, Min) [1] , [2]

查看 Web of Science ResearcherID 和 ORCID (由 Clarivate 提供) ACS ENERGY LETTERS

卷7

期2

页885-896

DOI10.1021/acsenergylett.1c02719

出版时间FEB 11 2022

已索引2022-03-30

文献类型Article

摘要

Covalent organic frameworks (COF) displayed strong affinity between COF and Li+ in terms of previous works. However, the relationship of COF and solvent molecules in the electrolyte was exclusive. Herein, a self-supporting COF separator (TPB-BD(OH)(2)-COF) was synthesized and served as a separator in lithium metal batteries. The formation of hydrogen bond network is due to the interaction of hydroxyl functional group (-OH) in TPB-BD(OH)(2)-COF and -OH center dot center dot center dot F and -OH center dot center dot center dot O in PF6-, EC and EMC within solvent sheath to achieve the desolvation process and realize more aggregative electrolyte, thus reducing the free solvent and lithium metal side effects. Therefore, the full cell assembled with self-supporting COF displayed superior cycling stability with a reversible capacity of 114.3 mAh g(-1) after 335 cycles at a current density of 1C and a capacity of 5 mAh cm(-2). Moreover, the COF separator can perform well even in extreme environments (temperature 60 degrees C).


关键词

Keywords PlusCRYSTALLINEELECTROLYTELAYERCATHODE

作者信息

通讯作者地址

Liu, Jun

(通讯作者)

South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China

通讯作者地址

Liu, Jun

(通讯作者)

South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Peoples R China

地址

1 South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China

2 South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Peoples R China

电子邮件地址msjliu@scut.edu.cn

类别/分类

研究方向ChemistryElectrochemistryEnergy & FuelsScience & Technology - Other TopicsMaterials Science