Ion transport in composite polymer electrolytes

Fu, Jialong; Li, Zhuo; Zhou, Xiaoyan; Guo, Xin

doi:10.1039/d2ma00215a

Cited by 33 publications

(16 citation statements)

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“…The improvement in ionic conductivity can be related to the following aspects: first, because a Li-rich region naturally arises at the interface between the PEO matrix and the LLZO, the Li-rich interfacial region is the location for the rapid transition of Li + and is a critical factor in increasing the rate of Li + migration. 48 The impurity layer of Li 2 CO 3 is removed, allowing for faster movement of Li + along the interface of LLZO and PEO. Secondly, the surface of 7% SA/LLZO will adsorb a small amount of reacted salicylate, which improves the wettability with the PEO matrix and promotes the uniform distribution of LLZO particles.…”

Section: Resultsmentioning

confidence: 99%

Salicylic acid treated Li₇La₃Zr₂O₁₂ achieves dual functions for a PEO-based solid polymer electrolyte in lithium metal batteries

Ding

et al. 2023

Sustainable Energy Fuels

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Section: Resultsmentioning

confidence: 99%

Salicylic acid treated Li₇La₃Zr₂O₁₂ achieves dual functions for a PEO-based solid polymer electrolyte in lithium metal batteries

Ding

et al. 2023

Sustainable Energy Fuels

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“…The mechanism of ion transport is still a complex and disputed field for polymer matrices because many factors, involving temperature, polymer structure, molecular weight, dielectric constant, and concentration of Li salt, affect the ionic conductivity. [15,[72][73][74] The ionic conductivity, σ, of an electrolyte can be described by the following Equation (1): [16,72] n q µ i i i i…”

Section: Ion-transport Mechanism In Polymer Matricesmentioning

confidence: 99%

“…The mechanism of ion transport is still a complex and disputed field for polymer matrices because many factors, involving temperature, polymer structure, molecular weight, dielectric constant, and concentration of Li salt, affect the ionic conductivity. [ 15,72–74 ] The ionic conductivity, σ, of an electrolyte can be described by the following Equation (): [ 16,72 ]

\begin{array}{*{20}{c}}{\sigma \; = \mathop \sum \limits_i {n_{\rm{i}}}{q_{\rm{i}}}{\mu _{\rm{i}}}}\end{array}

where n i , q i , and µ i are the charge concentration, charge number, and mobility of charged species, respectively. The conductivity can be directly improved with the increases in these three factors.…”

Section: Ion‐transport Mechanism In Polymer Matricesmentioning

confidence: 99%

Advanced Composite Solid Electrolytes for Lithium Batteries: Filler Dimensional Design and Ion Path Optimization

Zheng

et al. 2023

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organic liquid electrolytes hinder lithium batteries in achieving higher energy density, longer working life, and safer performance. [12,13] Solid electrolytes not only improve the long-term thermal and electrochemical stabilities but also obviate the need for separators and increase the energy density. [14][15][16][17] From these concerns, solid electrolytes are regarded as a potential substituent to improve the cycle performance of lithium batteries.Solid electrolytes are generally categorized as solid polymer electrolytes, inorganic solid electrolytes, and composite solid electrolytes. [16,18,19] Solid polymer electrolytes, such as poly(ethylene oxide) (PEO) and poly(vinylidene fluoride) (PVDF), are favored for their chemical stability, low density, low cost, processability, and wettability. [20][21][22][23] However, the applications are restricted by their low ionic conductivity at room temperature (typically from 10 −6 to 10 −5 S cm −1 ). Therefore, much research has been devoted to synthesizing solid polymer electrolytes with high ionic conductivity via increasing free volume and constructing fast transport paths, such as applying covalent organic framework-based polymer, [24,25] single lithium-ion-conducting polymer, [26,27] crosslinked polymer network, [28,29] and adding plasticizers. [30,31] Inorganic solid electrolytes, such as Li 7 La 3 Zr 2 O 12 (LLZO, garnet-type) and Li 0.33 La 0.56 TiO 3 (LLTO, perovskite-type), are single-ion conductors with superior lithium-ion conductivity (typically from 10 −4 to 10 −2 S cm −1 ). [32][33][34][35] However, inorganic solid electrolytes usually have a defect of high interfacial contact resistance because of the poor wettability at the electrode and electrolyte interface. [36,37] Moreover, recent studies have proved that the ion transport at the interface and the ionic conductivity of electrolytes are both essential to maintain a stable interface between electrode and electrolyte. [38][39][40] Therefore, constructing composite solid electrolytes by utilizing the advantages of both polymeric and inorganic materials is generally viewed as a practicable solution for nextgeneration lithium batteries. [16,41,42] Many recent studies have shown that the ion-conduction behavior is significantly influenced by the filler structures in a polymer/salt matrix, in which the effect is determined by the natural characteristics of the fillers and the interaction Composite solid electrolytes are considered to be the crucial components of all-solid-state lithium batteries, which are viewed as the next-generation energy storage devices for high energy density and long working life. Numerous studies have shown that fillers in composite solid electrolytes can effectively improve the ion-transport behavior, the essence of which lies in the optimization of the ion-transport path in the electrolyte. The performance is closely related to the structure of the fillers and the interaction between fillers and other electrolyte components including polymer matrices and lithium salts. In this rev...

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“…32,33 The relationship between ionic conductivity and temperature in this process also satisfies the Arrhenius equation. 34 Another expression of this equation is shown in formula (3): 33,35 σ = AT −1 exp(− E a / kT )where σ is the ionic conductivity, A is the preexponential factor, T is the temperature, E a is the activation energy for lithium ionic conductivity, and k is the Boltzmann constant.…”

Section: Classification Of Sses and Ion Conduction Mechanismmentioning

confidence: 99%

Section: Polymer Solid Electrolytesmentioning

confidence: 99%

Recent advances in designing solid-state electrolytes to reduce the working temperature of lithium batteries

Yao,

Wang,

Wan

et al. 2023

Mater. Chem. Front.

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Ion transport in composite polymer electrolytes

Abstract: Owing to the high flexibility, remarkable processability, and favorable interfacial contacts with electrodes, polymer-based electrolytes are highly valued for solid-state batteries with high energy density and safety. Among all the...

Cited by 33 publications

References 92 publications

Salicylic acid treated Li₇La₃Zr₂O₁₂ achieves dual functions for a PEO-based solid polymer electrolyte in lithium metal batteries

Salicylic acid treated Li₇La₃Zr₂O₁₂ achieves dual functions for a PEO-based solid polymer electrolyte in lithium metal batteries

Advanced Composite Solid Electrolytes for Lithium Batteries: Filler Dimensional Design and Ion Path Optimization

Recent advances in designing solid-state electrolytes to reduce the working temperature of lithium batteries

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Ion transport in composite polymer electrolytes

Abstract: Owing to the high flexibility, remarkable processability, and favorable interfacial contacts with electrodes, polymer-based electrolytes are highly valued for solid-state batteries with high energy density and safety. Among all the...

Cited by 33 publications

References 92 publications

Salicylic acid treated Li7La3Zr2O12 achieves dual functions for a PEO-based solid polymer electrolyte in lithium metal batteries

Salicylic acid treated Li7La3Zr2O12 achieves dual functions for a PEO-based solid polymer electrolyte in lithium metal batteries

Advanced Composite Solid Electrolytes for Lithium Batteries: Filler Dimensional Design and Ion Path Optimization

Recent advances in designing solid-state electrolytes to reduce the working temperature of lithium batteries

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Product

Resources

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Salicylic acid treated Li₇La₃Zr₂O₁₂ achieves dual functions for a PEO-based solid polymer electrolyte in lithium metal batteries

Salicylic acid treated Li₇La₃Zr₂O₁₂ achieves dual functions for a PEO-based solid polymer electrolyte in lithium metal batteries