Electrolytes for Lithium and Lithium-Ion Batteries

Hu, Libo; Zhang, Sheng S.; Zhang, Zhengcheng

doi:10.1007/978-3-319-15458-9_8

Cited by 15 publications

(6 citation statements)

References 149 publications

(170 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note that an obvious band appears between 865 and 890 cm –1 upon a complex formation with Li + , indicating the formation of the coordination structure for the G4–LiTFSI complexes . For a low concentration electrolyte of 0.2 M LiTFSI/G4, most G4 molecules exist in free states (as the molar ratio of G4 and LiTFSI is 20), which is much larger than a typical 4- or 5-fold coordination of Li + in aprotic solvents . As the LiTFSI concentration increases, the free G4 molecule decreases and the Li + -coordinated G4 molecule thus increases, the association between Li + and TFSI – simultaneously intensifies through the formation of contacted ion pairs and aggregated clusters.…”

Section: Resultsmentioning

confidence: 83%

Binary Mixtures of Highly Concentrated Tetraglyme and Hydrofluoroether as a Stable and Nonflammable Electrolyte for Li–O₂ Batteries

Zhao

Zhang

Sun

et al. 2018

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Developing a long-term stable electrolyte is one of the most enormous challenges for Li-O batteries. Equally, the high flammability of frequently used solvents seriously weakens the electrolyte safety in Li-O batteries, which inevitably restricts their commercial applications. Here, a binary mixture of highly concentrated tetraglyme electrolyte (HCG4) and 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether (TTE) was used for a novel electrolyte (HCG4/TTE) in Li-O batteries, which exhibit good wettability, enhanced ionic conductivity, considerable nonflammability, and high electrochemical stability. Being a co-solvent, TTE can contribute to increasing ionic conductivity and to improving flame retardance of the as-prepared electrolyte. The cell with this novel electrolyte displays an enhanced cycling stability, resulting from the high electrochemical stability during cycling and the formation of electrochemically stable interfaces prevents parasitic reactions occurring on the Li anode. These results presented here demonstrate a novel electrolyte with a high electrochemical stability and considerable safety for Li-O batteries.

show abstract

Section: Resultsmentioning

confidence: 83%

Binary Mixtures of Highly Concentrated Tetraglyme and Hydrofluoroether as a Stable and Nonflammable Electrolyte for Li–O₂ Batteries

Zhao

Zhang

Sun

et al. 2018

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…[1,2] In addition to being predominantly employed in portable electronic devices, LIBs have shown excellent potential for high-power and energy density applications such as electric vehicles and grid-scale electrochemical energy storage systems. [3][4][5] However, commercial LIBs often use organic carbonate liquid electrolytes, which have a limited working voltage [6] as well as high toxicity [7] , and are highly flammable and corrosive. These electrolytes also tend to react with active materials causing capacity loss [1,8,9] and have a transference number between 0.2 and 0.5.…”

Section: Introductionmentioning

confidence: 99%

A Ceramic‐PVDF Composite Membrane with Modified Interfaces as an Ion‐Conducting Electrolyte for Solid‐State Lithium‐Ion Batteries Operating at Room Temperature

Kwok

et al. 2018

ChemElectroChem

View full text Add to dashboard Cite

Solid-state batteries hold great promise because of their safety and high projected energy density. However, the sizeable interfacial resistance between the electrodes and the electrolyte of such batteries is a significant bottleneck in the development of this technology. In this work, we develop a Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) and polyvinylidene fluoride (PVDF) solid-state composite membrane characterized by high conductivity, tensile strength, and flexibility as well as low impedance if interfacially modified by a minute amount of liquid electrolyte. A solid-state lithium-ion battery using this electrolyte with LiFePO 4 and Li as electrodes delivers excellent rate capability and cycling stability at room temperature. In particular, the battery shows an initial discharge capacity of 155 mAh g À1 and, after 100 cycles at 1C, of 145 mAh g À1 . Even at 4C, the discharge capacity is 96 mAh g À1 . Our study suggests that the interfacially modified LLZTO-PVDF membrane is a promising electrolyte for solid-state lithium-ion batteries.

show abstract

“…Lithium‐ion secondary batteries (LIBs) have been adopted for many applications ranging from portable electronic devices to electric vehicles, which is why they have been extensively and intensively investigated in recent decades 1–6 . The electrolyte is one of the key components of a battery system, because the choice of electrolyte affects various properties such as the electrical conductivity, cationic transference number, and stability near electrodes 7–9 . As the first commercial Li‐ion battery was fabricated with LiPF 6 salt and ethylene carbonate (EC), the use of fluorene‐based counter anions and carbonate solvents has been common.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6] The electrolyte is one of the key components of a battery system, because the choice of electrolyte affects various properties such as the electrical conductivity, cationic transference number, and stability near electrodes. [7][8][9] As the first commercial Li-ion battery was fabricated with LiPF 6 salt and ethylene carbonate (EC), the use of fluorenebased counter anions and carbonate solvents has been common. However, stability issues with carbonate-based electrolytes have prompted extensive studies in a search for solutions.…”

mentioning

confidence: 99%

Molecular dynamics study on lithium‐ion transport in PEO branched nanopores with PYR₁₄TFSI ionic liquid

et al. 2022

View full text Add to dashboard Cite

Lithium ion transport in a poly-(ethylene oxide) (PEO) branched nanopore filled with a solution of [lithium][bis(trifluoromethanesulfonyl)imide]/ [1-butyl-1-methylpyrrolidinium][bis(trifluoromethanesulfonyl)imide] (LiTF-SI/PYR 14 TFSI) was investigated by molecular dynamics using many-body polarizable force field. The structural and dynamic properties of lithium ions in the nanopores with different sizes and ratios of ions to PEO chains were examined. The first coordination shell of the lithium ions had a lower intensity in the longitudinal direction than in the radial direction. Cluster analysis of [Li x (TFSI) n ] −(n−x) showed the absence of large lithium clusters (x ≥ 2) as a result of the enhanced suppression of monodentate structures compared with binary electrolytes (i.e., LiTFSI/PYR 14 TFSI without PEO chains). The emergence of [Li(TFSI) 2 ] − and its relatively small hydrodynamic radius facilitated rapid dynamics compared with binary electrolytes. The diffusion coefficients and ionic conductivities of the lithium ions in the longitudinal direction increased with an increase in the ratio of the ions to PEO chains and a decrease in the pore size. It was noted that the lithium-ion transport was mainly governed by structural diffusion based on a shorter residual time for anions compared with binary electrolytes. In addition, single ion trajectory analysis was performed and more frequent anion exchanges were observed when PEO chains were introduced.

show abstract

Electrolytes for Lithium and Lithium-Ion Batteries

Cited by 15 publications

References 149 publications

Binary Mixtures of Highly Concentrated Tetraglyme and Hydrofluoroether as a Stable and Nonflammable Electrolyte for Li–O₂ Batteries

Binary Mixtures of Highly Concentrated Tetraglyme and Hydrofluoroether as a Stable and Nonflammable Electrolyte for Li–O₂ Batteries

A Ceramic‐PVDF Composite Membrane with Modified Interfaces as an Ion‐Conducting Electrolyte for Solid‐State Lithium‐Ion Batteries Operating at Room Temperature

Molecular dynamics study on lithium‐ion transport in PEO branched nanopores with PYR₁₄TFSI ionic liquid

Contact Info

Product

Resources

About

Electrolytes for Lithium and Lithium-Ion Batteries

Cited by 15 publications

References 149 publications

Binary Mixtures of Highly Concentrated Tetraglyme and Hydrofluoroether as a Stable and Nonflammable Electrolyte for Li–O2 Batteries

Binary Mixtures of Highly Concentrated Tetraglyme and Hydrofluoroether as a Stable and Nonflammable Electrolyte for Li–O2 Batteries

A Ceramic‐PVDF Composite Membrane with Modified Interfaces as an Ion‐Conducting Electrolyte for Solid‐State Lithium‐Ion Batteries Operating at Room Temperature

Molecular dynamics study on lithium‐ion transport in PEO branched nanopores with PYR14TFSI ionic liquid

Contact Info

Product

Resources

About

Binary Mixtures of Highly Concentrated Tetraglyme and Hydrofluoroether as a Stable and Nonflammable Electrolyte for Li–O₂ Batteries

Binary Mixtures of Highly Concentrated Tetraglyme and Hydrofluoroether as a Stable and Nonflammable Electrolyte for Li–O₂ Batteries

Molecular dynamics study on lithium‐ion transport in PEO branched nanopores with PYR₁₄TFSI ionic liquid