Enhanced cycling, safety and high-temperature performance of hybrid Li ion/ Li metal batteries via fluoroethylene carbonate additive

Gao，Tingsong1,2,3; Bian，Juncao1,2,3; Huang，Fengbin3; Ling，Sifan2,3; Li，Zhiqiang1; Yuan，Huimin1; Lin，Haibin3; Kong，Long4; Deng，Bei5; Zhao，Yusheng6; Lu，Zhouguang1

2024-02-15

10.1016/j.matchemphys.2023.128868

Materials Chemistry and Physics   影响因子和分区

0254-0584

Hybrid graphite/Li metal anode has been proved to be a feasible approach to enlarge the energy density of Li-ion batteries. However, there is still a gap between the electrochemical performance of the hybrid Li-ion/Li metal batteries (HLI-LMBs) and the practical requirements. In this work, the cycling, safety and high-temperature performance of the HLI-LMBs have been successfully enhanced via adding fluoroethylene carbonate (FEC) in the electrolyte. It is found that FEC can facilitate the formation of a LiF-rich SEI layer on the surface of Li metal, which effectively suppresses the formation of Li dendrites and enables uniform deposition of Li metal on the surface of graphite. The LiF-rich SEI layer can restrain the exothermal reaction between Li metal and electrolyte under short-circuit. Moreover, the LiF-rich SEI slows down the reaction of anode with electrolyte and largely suppresses the Li dendrite formation at high temperature, improving the high-temperature performance of the HLI-LMBs. This work sheds the light on the critical roles of electrolyte additive and can serve as a guideline for the development of high-performance HLI-LMBs.

Battery safety Cycle life Fluoroethylene carbonate High-temperature performance Hybrid Li-Ion/ Li metal battery

SCI ; EI

英语

第一 ; 通讯

MATERIALS SCIENCE

2-s2.0-85181055060

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Department of Materials Science,Shenzhen MSU-BIT University,Shenzhen,518100,China
3.Guangdong Provincial Key Laboratory of Energy Materials for Electric Power,Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
4.Frontiers Science Center for Flexible Electronics and Xi'an Institute of Flexible Electronics (IFE),Northwestern Polytechnical University,Xi'an,710129,China
5.Department of Physics,College of Science,Shantou University,Shantou,Guangdong,515063,China
6.Eastern Institute for Advanced Study,Zhejiang,315200,China

Gao，Tingsong,Bian，Juncao,Huang，Fengbin,et al. Enhanced cycling, safety and high-temperature performance of hybrid Li ion/ Li metal batteries via fluoroethylene carbonate additive[J]. Materials Chemistry and Physics,2024,314.

Gao，Tingsong.,Bian，Juncao.,Huang，Fengbin.,Ling，Sifan.,Li，Zhiqiang.,...&Lu，Zhouguang.(2024).Enhanced cycling, safety and high-temperature performance of hybrid Li ion/ Li metal batteries via fluoroethylene carbonate additive.Materials Chemistry and Physics,314.

Gao，Tingsong,et al."Enhanced cycling, safety and high-temperature performance of hybrid Li ion/ Li metal batteries via fluoroethylene carbonate additive".Materials Chemistry and Physics 314(2024).