Locally Fluorinated Electrolyte Medium Layer for High-Performance Anode-Free Li-Metal Batteries

Ye, Xue1,2; Wu, Jing3; Liang, Jianneng1; Sun, Yipeng4; Ren, Xiangzhong1; Ouyang, Xiaoping2; Wu, Dazhuan2; Li, Yongliang1; Zhang, Lei1; Hu, Jiangtao1; Zhang, Qianling1; Liu, Jianhong1

2022-11-01

10.1021/acsami.2c15452

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

1944-8252

Low cycling Coulombic efficiency (CE) and messy Li dendrite growth problems have greatly hindered the develop-ment of anode-free Li-metal batteries (AFLBs). Thus, functional electrolytes for uniform lithium deposition and lithium/electrolyte side reaction suppression are desired. Here, we report a locally fluorinated electrolyte (LFE) medium layer surrounding Cu foils to tailor the chemical compositions of the solid-electrolyte interphase (SEI) in AFLBs for inhibiting the immoderate Li dendrite growth and to suppress the interfacial reaction. This LFE consists of highly concentrated LiTFSI dissolved in a fluoroethylene carbonate and/ or succinonitrile plastic mixture. The CE of Cu||Li-Ni0.8Co0.1Mn0.1O2 (NCM811) AFLB increased to a high level of 99% as envisaged, and the cycling ability was also highly improved. These improvements are facilitated by the formation of a uniform, dense, and LiF-rich SEI. LiF possesses high interfacial energy at the LiF/Li interface, resulting in a more uniform Li deposition process as proved by density functional theory (DFT) calculation results. This work provides a simple yet utility tech for the enhancement of future high-energy-density AFLBs.

anode-free lithium batteries locally fluorinated electrolyte solid-electrolyte interphase LiF lithium dendrite Ni-rich cathode cryo-transmission electron microscopy

SCI

英语

非南科大

Shenzhen Basic Research Project["JCYJ20170818092720054","JCYJ20190808145203535","JCYJ20190808144413257"] ; National Key Research and Development Program Funding[2020YFC1909600] ; Natural Science Foundation of Guangdong Province[2020A1515010379] ; Postdoctoral Science Foundation of China[2020M682855] ; Major Industrial Projects of Shenzhen[s2017001850011]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000891676000001

AMER CHEMICAL SOC

Web of Science

1.Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518060, Guangdong, Peoples R China
2.Zhejiang Univ, Coll Energy Engn, Hangzhou 310058, Peoples R China
3.Southern Univ Sci & Technol, Cryo Ctr, Shenzhen 518055, Peoples R China
4.Univ Western Ontario, Dept Mech & Mat Engn, London, ON N6A 3K7, Canada

Ye, Xue,Wu, Jing,Liang, Jianneng,et al. Locally Fluorinated Electrolyte Medium Layer for High-Performance Anode-Free Li-Metal Batteries[J]. ACS Applied Materials & Interfaces,2022.

Ye, Xue.,Wu, Jing.,Liang, Jianneng.,Sun, Yipeng.,Ren, Xiangzhong.,...&Liu, Jianhong.(2022).Locally Fluorinated Electrolyte Medium Layer for High-Performance Anode-Free Li-Metal Batteries.ACS Applied Materials & Interfaces.

Ye, Xue,et al."Locally Fluorinated Electrolyte Medium Layer for High-Performance Anode-Free Li-Metal Batteries".ACS Applied Materials & Interfaces (2022).