Ionic liquids for high performance lithium metal batteries

Liu, Kexin; Wang, Zhuyi; Shi, Liyi; Jungsuttiwong, Siriporn; Yuan, Shuai

doi:10.1016/j.jechem.2020.11.017

Cited by 195 publications

(139 citation statements)

References 134 publications

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“…However, rechargeable batteries based on lithium metal remain attractive due the extremely high specific capacity and lowest electrochemical potential allowing high amounts of energy to be stored [19]. Furthermore, lithium-ion batteries, which-with correct use-do not suffer from lithium dendrite formation, are close to their theoretical capacity, making the use of still unknown alternative anode materials inevitable if the energy density is to be increased [20]. By simply adjusting the composition and properties of the electrolyte the formation of dendrites may be sufficiently suppressed [21].…”

Section: Introductionmentioning

confidence: 99%

Structure-Property Relation of Trimethyl Ammonium Ionic Liquids for Battery Applications

et al. 2021

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Ionic liquids are attractive and safe electrolytes for diverse electrochemical applications such as advanced rechargeable batteries with high energy densities. Their properties that are beneficial for energy storage and conversion include negligible vapor-pressure, intrinsic conductivity as well as high stability. To explore the suitability of a series of ionic liquids with small ammonium cations for potential battery applications, we investigated their thermal and transport properties. We studied the influence of the symmetrical imide-type anions bis(trifluoromethanesulfonyl)imide ([TFSI]−) and bis(fluorosulfonyl)imide ([FSI]−), side chain length and functionalization, as well as lithium salt content on the properties of the electrolytes. Many of the samples are liquid at ambient temperature, but their solidification temperatures show disparate behavior. The transport properties showed clear trends: the dynamics are accelerated for samples with the [FSI]− anion, shorter side chains, ether functionalization and lower amounts of lithium salts. Detailed insight was obtained from the diffusion coefficients of the different ions in the electrolytes, which revealed the formation of aggregates of lithium cations coordinated by anions. The ionic liquid electrolytes exhibit sufficient stability in NMC/Li half-cells at elevated temperatures with small current rates without the need of additional liquid electrolytes, although Li-plating was observed. Electrolytes containing [TFSI]− anions showed superior stability compared to those with [FSI]− anions in battery tests.

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Section: Introductionmentioning

confidence: 99%

Structure-Property Relation of Trimethyl Ammonium Ionic Liquids for Battery Applications

et al. 2021

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“…For example, ionic liquid-based copolymers are ionic polymers containing charge-balanced anions and cations featuring high ionic conductivity, excellent thermal stability, and wide electrochemical work windows. Hence, they have been broadly used in battery systems [ 81 , 82 , 83 ] as binders [ 84 ] and electrolytes [ 85 ] as well as in many other devices [ 86 , 87 ]. Ionic liquid-based polymers with freely moving ions could promote the mobility and transmission of Li + between electrodes, helpful for cramping plentiful Li + within the limited spaces of battery systems.…”

Section: Functions and Effects Of Binders And Their Rational Designmentioning

confidence: 99%

Rational Design of Effective Binders for LiFePO4 Cathodes

Huang

et al. 2021

Polymers

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Polymer binders are critical auxiliary additives to Li-ion batteries that provide adhesion and cohesion for electrodes to maintain conductive networks upon charge/discharge processes. Therefore, polymer binders become interconnected electrode structures affecting electrochemical performances, especially in LiFePO4 cathodes with one-dimensional Li+ channels. In this paper, recent improvements in the polymer binders used in the LiFePO4 cathodes of Li-ion batteries are reviewed in terms of structural design, synthetic methods, and working mechanisms. The polymer binders were classified into three types depending on their effects on the performances of LiFePO4 cathodes. The first consisted of PVDF and related composites, and the second relied on waterborne and conductive binders. Profound insights into the ability of binder structures to enhance cathode performance were discovered. Overcoming the bottleneck shortage originating from olivine structure LiFePO4 using efficient polymer structures is discussed. We forecast design principles for the polymer binders used in the high-performance LiFePO4 cathodes of Li-ion batteries. Finally, perspectives on the application of future binder designs for electrodes with poor conductivity are presented to provide possible design directions for chemical structures.

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“…This interesting combination of properties have attracted an exponential increasing interest of the scientific community, with a growing number or articles published and an increasing spectrum of potential applications [ 31 ]. Among these applications, the low volatility and high electrical conductivity of ionic liquids, their potential applications electrochemical processes is continuously increasing, including their use as electrolyte in batteries and fuel cells, electrode materials for batteries/supercapacitors and carbon precursors for electrode catalysts [ 31 , 32 , 33 , 34 , 35 ].…”

Section: Use Of Ionic Liquids In Electrodepositionmentioning

confidence: 99%

An Old Technique with A Promising Future: Recent Advances in the Use of Electrodeposition for Metal Recovery

Delgado¹,

Fernández-Morales²,

Llanos³

2021

Molecules

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Although the first published works on electrodeposition dates from more than one century ago (1905), the uses of this technique in the recovery of metals are attracting an increasing interest from the scientific community in the recent years. Moreover, the intense use of metals in electronics and the necessity to assure a second life of these devices in a context of circular economy, have increased the interest of the scientific community on electrodeposition, with almost 3000 works published per year nowadays. In this review, we aim to revise the most relevant and recent publications in the application of electrodeposition for metal recovery. These contributions have been classified into four main groups of approaches: (1) treatment and reuse of wastewater; (2) use of ionic liquids; (3) use of bio-electrochemical processes (microbial fuel cells and microbial electrolysis cells) and (4) integration of electrodeposition with other processes (bioleaching, adsorption, membrane processes, etc.). This would increase the awareness about the importance of the technology and would serve as a starting point for anyone that aims to start working in the field.

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Ionic liquids for high performance lithium metal batteries

Cited by 195 publications

References 134 publications

Structure-Property Relation of Trimethyl Ammonium Ionic Liquids for Battery Applications

Structure-Property Relation of Trimethyl Ammonium Ionic Liquids for Battery Applications

Rational Design of Effective Binders for LiFePO4 Cathodes

An Old Technique with A Promising Future: Recent Advances in the Use of Electrodeposition for Metal Recovery

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