Emerging electrolytes with fluorinated solvents for rechargeable lithium-based batteries. (3rd April 2023)

• Record Type: Journal Article
• Authors: Wang, Yuankun; Li, Zhiming; Hou, Yunpeng; Hao, Zhimeng; Zhang, Qiu; Ni, Youxuan; Lu, Yong; Yan, Zhenhua; Zhang, Kai; Zhao, Qing; Li, Fujun; Chen, Jun
• Is Part Of: Chemical Society reviews. Volume 52:Number 8(2023)
• Page Start: 2713
• Page End: 2763
• Publication Date: 2023-04-03
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/d2cs00873d
• Languages: English
• ISSNs: 0306-0012

Abstract

Abstract : This review provides a detailed analysis and summary of the design principles and strategies for the synthesis of fluorinated electrolyte solvents for Li-based batteries. Abstract : Electrolytes that can ensure the movement of ions and regulate interfacial chemistries for fast mass and charge transfer are essential in many types of electrochemical energy storage devices. However, in the emerging energy-dense lithium-based batteries, the uncontrollable side-reactions and consumption of the electrolyte result in poor electrochemical performances and severe safety concerns. In this case, fluorination has been demonstrated to be one of the most effective strategies to overcome the above-mentioned issues without significantly contributing to engineering and technical difficulties. Herein, we present a comprehensive overview of the fluorinated solvents that can be employed in lithium-based batteries. Firstly, the basic parameters that dictate the properties of solvents/electrolytes are elaborated, including physical properties, solvation structure, interface chemistry, and safety. Specifically, we focus on the advances and scientific challenges associated with different solvents and the enhancement in their performance after fluorination. Secondly, we discuss the synthetic methods for new fluorinated solvents and their reaction mechanisms in depth. Thirdly, the progress, structure–performance relationship, and applications of fluorinated solvents are reviewed. Subsequently, we provide suggestions on the solvent selection for different battery chemistries. Finally, the existing challenges and further efforts on fluorinated solvents are summarized. The combination of advanced synthesis and characterization approaches with the assistance of machine learning will enable the design of new fluorinated solvents for advanced lithium-based batteries.