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concentrated electrolytes for rechargeable lithium metal batteries

Materials Futures 2023年第1期2卷 8-24页

作者： Chunxi Tian Kun Qin Liumin Suo Institute of Physics Chinese Academy of SciencesBeijing National Laboratory for Condensed Matter PhysicsBeijing 100190People’s Republic of China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China

Traditional lithium-ion batteries with graphite anodes have gradually been limited by the glass ceiling of energy *** a result,lithium metal batteries(LMBs),regarded as the ideal alternative,have attracted considerable ***,lithium is highly reactive and susceptible to most electrolytes,resulting in poor cycle *** addition,lithium grows Li dendrites during charging,adversely affecting the safety of ***,LMBs are more sensitive to the chemical composition of electrolytes and their relative ratios(concentrations).Recently,concentrated electrolytes have been widely demonstrated to be friendly to lithium metal anodes(LMAs).This review focuses on the progress of concentrated electrolytes in LMBs,including the solvation structure varying with concentration,unique functions in stabilizing the LMA,and their interfacial chemistry with LMA.

关键词： nonaqueous Li electrolytes concentrated electrolytes Li metal batteries Li metal anode

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Ion Dynamics in concentrated Electrolyte Solutions:Relating Equilibrium Fluctuations of the Ions to Transport Properties in Battery Cells

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Energy & Environmental Materials 2024年第1期7卷 131-138页

作者： Bernhard Roling Vanessa Miß Janosch Kettner Department of Chemistry University of MarburgHans-Meerwein-Str.435032 MarburgGermany

In recent years,the interest in the development of highly concentrated electrolyte solutions for battery applications has increased *** electrolyte solutions are typically characterized by a low flammability,a high thermal and electrochemical stability and by the formation of a stable solid electrolyte interphase(SEI)in contact to electrode ***,the classification of concentrated electrolyte solutions in terms of the classical scheme"strong"or"weak"has been controversially discussed in the *** this paper,a comprehensive theoretical framework is presented for a more general classification,which is based on a comparison of charge transport and mass *** combining the Onsager transport formalism with linear response theory,center-of-mass fluctuations and collective translational dipole fluctuations of the ions in equilibrium are related to transport properties in a lithium-ion battery cell,namely mass transport,charge transport and Li^(+)transport under anion-blocking *** relevance of the classification approach is substantiated by showing that i)it is straightforward to classify highly concentrated electrolytes and that ii)both fast charge transport and fast mass transport are indispensable for achieving fast Li^(+)transport under anion-blocking conditions.

关键词： batteries concentrated electrolytes linear response theory Onsager formalism transport

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Charting the course to solid-state dual-ion batteries

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Carbon Energy 2024年第3期6卷 132-177页

作者： Habtom D.Asfaw Antonia Kotronia Nuria Garcia-Araez Kristina Edström Daniel Brandell Department of Chemistry Ångström LaboratoryUppsala UniversityUppsalaSweden Department of Chemistry University of SouthamptonSouthamptonUK

An electrolyte destined for use in a dual-ion battery(DIB)must be stable at the inherently high potential required for anion intercalation in the graphite electrode,while also protecting the Al current collector from anodic dissolution.A higher salt concentration is needed in the electrolyte,in comparison to typical battery electrolytes,to maximize energy density,while ensuring acceptable ionic conductivity and operational *** recent years,studies have demonstrated that highly concentrated organic electrolytes,ionic liquids,gel polymer electrolytes(GPEs),ionogels,and water-in-salt electrolytes can potentially be used in *** can help reduce the use of solvents and thus lead to a substantial change in the Coulombic efficiency,energy density,and long-term cycle life of ***,GPEs are suited to manufacture compact DIB designs without separators by virtue of their mechanical strength and electrical *** this review,we highlight the latest advances in the application of different electrolytes in DIBs,with particular emphasis on GPEs.

关键词： anion intercalation concentrated electrolytes dual-ion battery graphite ionic liquids polymer electrolyte

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Recent advances in “water in salt” electrolytes for aqueous rechargeable monovalent-ion(Li^(+), Na^(+), K^(+)) batteries

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Journal of Energy Chemistry 2022年第6期31卷 84-99,I0003页

作者： Hong Gao Kaikai Tang Jun Xiao Xin Guo Weihua Chen Hao Liu Guoxiu Wang Joint International Laboratory on Environmental and Energy Frontier Materials School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China Centre for Clean Energy Technology School of Mathematics and PhysicsFaculty of ScienceUniversity of Technology SydneySydneyNSW 2007Australia Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou 450002HenanChina

Aqueous rechargeable batteries have attracted enormous attention owning to their intrinsic characteristics of non-flammability, low cost, and the superior ionic conductivity of the aqueous ***, the narrow electrochemical stability window(1.23 V), imposed by hydrogen and oxygen evolution, constrains the overall energy density of batteries. The revolutionary "water-in-salt” electrolytes considerably expand the electrochemical stability window to 3 or even 4 volts, giving rise to a new series of high-voltage aqueous metal-ion chemistries. Herein, the recent advances in "water-in-salt” electrolytes for aqueous monovalent-ion(Li^(+), Na^(+), K^(+)) rechargeable batteries have been systematically reviewed. Meanwhile, the corresponding reaction mechanisms, electrochemical performances and the existing challenges and opportunities are also highlighted.

关键词： Aqueous batteries concentrated electrolytes Water-in-salt Hybrid electrolytes Solid-electrolyte interface

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