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Ionic liquids for high performance lithium metal batteries

Journal of Energy Chemistry 2021年第8期30卷 320-333,I0007页

作者： Kexin Liu Zhuyi Wang Liyi Shi siriporn jungsuttiwong Shuai Yuan School of Materials Science and Engineering Shanghai University200444 ShanghaiChina Research Centre of Nanoscience and Nanotechnology Shanghai University200444 ShanghaiChina Center for Organic Electronic and Alternative Energy Department of Chemistry and Center of Excellence for Innovation in ChemistryFaculty of ScienceUbon Ratchathani University34190 Ubon RatchathaniThailand Emerging Industries Institute Shanghai UniversityJiaxing 314006China

The pursuit of high energy density has promoted the development of high-performance lithium metal ***,it faces a serious security *** liquids have attracted great attention due to their high ionic conductivity,non-flammability,and the properties of promoting the formation of stable SEI *** understanding the problems existing in lithium metal batteries and the role of ionic liquids in them is of great significance for improving the performance of lithium metal *** article reviews the effects of the molecular structure of ionic liquids on ionic conductivity,Li^(+)ion transference number,electrochemical stability window,and lithium metal anode/electrolyte interface,as well as the application of ionic liquids in Li-high voltage cathode batteries,Li-O_(2) batteries and Li-S *** molecular design,composition and polymerization will be the main strategies for the future development of ionic liquid-based electrolytes for high performance lithium metal battery.

关键词： Ionic liquids Li+ion conduction Interface issues Lithium metal battery

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A cation-dipole-reinforced elastic polymer electrolyte enabling long-cycling quasi-solid-state lithium metal batteries

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Journal of Energy Chemistry 2022年第12期75卷 340-348,I0009页

作者： Zhuyi Wang Yiming Wang Pan Zhai Preeyaporn Poldorn siriporn jungsuttiwong Shuai Yuan Research Centre of Nanoscience and Nanotechnology Shanghai UniversityShanghai 200444China Center for Organic Electronic and Alternative Energy Department of Chemistry and Center of Excellence for Innovation in ChemistryFaculty of ScienceUbon Ratchathani UniversityUbon Ratchathani 34190Thailand

The application of ionic liquids(IL)in polymer electrolytes represents a safer alternative to the currently used organic solvents in lithium batteries due to their nonflammability and thermal ***,as a plasticizer,it is generally agreed that the introduction of ionic liquid usually leads to a trade-off between ion transport and mechanical properties of polymer *** we report the synthesis of an IL-embedded polymer electrolyte with both high ionic conductivity(2.77×10^(-4)S cm^(-1)at room temperature)and excellent mechanical properties(high tensile strength up to 11.4 MPa and excellent stretchability of 387%elongation at break)achieved by strong ion–dipole interactions between polymer electrolyte components,which was unveiled by the DFT ***,this polymer electrolyte also exhibits nonflammability,good thermal stability and the ability to recover reversibly from applied stress,i.e.,excellent *** highly viscoelastic polymer electrolyte enables tight interfacial contact and good adaptability with electrodes for stable lithium stripping/plating for 2000 h under a current density of 0.1 mA cm^(-2).By coupling with this polymer electrolyte,the LiFePO_(4)/Li cells exhibit outstanding cycling stability at room temperature as well as the reliability under extreme environmental temperature or being abused.

关键词： Elastic polymer electrolyte Ion-dipole interactions High tensile strength Quasi-solid-state lithium battery Long cycling

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