Strategies to enhance Li^(+) transference number in liquid electrolytes for better lithium batteries
作者机构：Department of Chemical EngineeringTsinghua UniversityBeijing 100084China School of Materials and EnergyUniversity of Electronic Science and Technology of ChinaChengdu 611731China Advanced Energy Research InstituteUniversity of Electronic Science and Technology of ChinaChengdu 611731China Sichuan Provincial Engineering Research Center of Flexible Display Material GenomeUniversity of Electronic Science and Technology of ChinaChengdu 611731China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2023年第16卷第6期
页 面：8055-8071页
核心收录：
学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0703[理学-化学]
基 金：support by the National Natural Science Foundation of China(Nos.22071133 and 21905040) the Tsinghua University-China Petrochemical Corporation Joint Institute for Green Chemical Engineering(No.421120) Tsinghua-Foshan Innovation Special Fund(TFISF,No.2020THFS0130) Tsinghua University Initiative Scientific Research Program.
主 题：lithium batteries Li^(+)transference number rate performance strategies mechanisms
摘 要：Growing market demand from portable electronics to electric automobiles boosts the development of lithium-ion batteries(LIBs)with high energy density and rate performance.However,strong solvation effect between lithium ions(Li^(+))and solvent molecules in common electrolytes limits the mobility of Li^(+)ions in electrolytes.Consequently,anions dominate the charge conduction in electrolytes,and in most cases,the value of Li^(+)transference number(T_(+))is between 0.2 and 0.4.A low T_(+)will aggravate concentration polarization in the process of charging and discharging,especially at high rate,which not only increases the overpotential but also intensifies side reactions,along with uneven deposition of lithium(Li)and the growth of lithium dendrites when lithium metal is used as anode.In this review,promising strategies to improve T_(+)in liquid electrolytes would be summarized.The migration of Li^(+)ions is affected directly by the types and concentration of lithium salts,solvents,and additives in bulk electrolytes.Besides,Li^(+)ions will pass through the separator and solid electrolyte interphase(SEI)when transferring between anodes and cathodes.With this in mind,we will classify and summarize threads of enhancing T_(+)from five aspects:lithium salts,solvents,additives,separators,and SEI based on different mechanisms,including covalently bonding,desolvation effect,Lewis acid-base interaction,electrostatic interaction,pore sieving,and supramolecular interaction.We believe this review will present a systematic understanding and summary on T_(+)and point out some feasible threads to enhance battery performance by enhancing T_(+).
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