Coupling two-dimensional fillers with polymer chains in solid polymer electrolyte for room-temperature dendrite-free lithium-metal batteries

An, Hanwen; Liu, Qingsong; An, Jiale; Liang, Shuaitong; Wang, Xufeng; Xu, Zhiwei; Tong, Yujin; Huo, Hua; Sun, Nan; Wang, Yinglin; Shi, Yifan; Wang, Jiajun

doi:10.1016/j.ensm.2021.09.019

Cited by 36 publications

(26 citation statements)

References 38 publications

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“…Flexible solid polymer electrolyte films consisting of PEO and LiTFSI were prepared by using the solution-pouring method ( Supplementary Fig. S4 ) [ 29 ]. The thickness of the solid electrolyte was 107 μm ( Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Effective transport network driven by tortuosity gradient enables high-electrochem-active solid-state batteries

Liu

Wang

et al. 2022

National Science Review

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Simultaneously achieving high electrochemical activity and high loading for solid-state batteries have been hindered by slow ion transports within solid electrodes, in particular with an increase in electrode thickness. Ions transport governed by ‘point-to-point’ diffusion inside a solid-state electrode is challenging, but still remains elusive. Herein, synchronized electrochemical analysis with X-ray tomography and ptychography reveals new insights into the nature of slow ion transport in solid-state electrodes. A thickness-dependent delithiation kinetics is spatially probed to identify that low delithiation kinetics originates from the high tortuous and slow longitudinal transport pathways. By fabricating a tortuosity-gradient electrode to create an effective ion percolation network, the tortuosity-gradient electrode architecture promotes fast charge transport, migrates the heterogeneous solid-state reaction, enhances electrochemical activity, and extends cycle life in thick solid-state electrodes. These findings establish the effective transport-pathways as key design principles for realizing the promise of solid-state high-loading cathodes.

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Section: Resultsmentioning

confidence: 99%

Effective transport network driven by tortuosity gradient enables high-electrochem-active solid-state batteries

Liu

Wang

et al. 2022

National Science Review

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“…Other 2D nanomaterials such as vermiculite nanosheet, g-C3N4 nanosheet [180], boronnitride (BN) nanoplate [181], MXene nanosheet [182], lithium montmorillonite nanoplate [183], and MgAlOH nanosheet [184] are further used as effective nanofillers. Li et al [182] prepared PEO-LiTFSI composite solid electrolytes with a small amount of Ti3C2Tx nanosheets uniformly dispersed in the matrices by a simple aqueous solution mixing method.…”

Section: Two-dimensional (2d) Nanofillermentioning

confidence: 99%

Solid polymer electrolytes: Ion conduction mechanisms and enhancement strategies

Zhang

Meng

Hou

et al. 2023

Nano Research Energy

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Solid polymer electrolytes (SPEs) possess comprehensive advantages such as high flexibility, low interfacial resistance with the electrodes, excellent film-forming ability, and low price, however, their applications in solid-state batteries are mainly hindered by the insufficient ionic conductivity especially below the melting temperatures, etc. To improve the ion conduction capability and other properties, a variety of modification strategies have been exploited. In this review article, we scrutinize the structure characteristics and the ion transfer behaviors of the SPEs (and their composites) and then disclose the ion conduction mechanisms. The ion transport involves the ion hopping and the polymer segmental motion, and the improvement in the ionic conductivity is mainly attributed to the increase of the concentration and mobility of the charge carriers and the construction of fast-ion pathways. Furthermore, the recent advances on the modification strategies of the SPEs to enhance the ion conduction from copolymer structure design to lithium salt exploitation, additive engineering, and electrolyte micromorphology adjustion are summarized. This article intends to give a comprehensive, systemic, and profound understanding of the ion conduction and enhancement mechanisms of the SPEs for their viable applications in solid-state batteries with high safety and energy density.

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“…Ionic conductivity of A-Li-RuO 2 accords with the classical Arrhenius equation (Eq. 2) ( 58 )normalσfalse(Tfalse)=Aexptrue(−EnormalaRTtrue)where A is the pre-exponential factor, E a is the activation energy, and R represents the ideal gas constant.…”

Section: Methodsmentioning

confidence: 99%

Tailoring electronic-ionic local environment for solid-state Li-O ₂ battery by engineering crystal structure

et al. 2022

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Solid-state Li-O 2 batteries (SSLOBs) have attracted considerable attention because of their high energy density and superior safety. However, their sluggish kinetics have severely impeded their practical application. Despite efforts to design highly efficient catalysts, efficient oxygen reaction evolution at gas-solid interfaces and fast transport pathways in solid-state electrodes remain challenging. Here, we develop a dual electronic-ionic microenvironment to substantially enhance oxygen electrolysis in solid-state batteries. By designing a lithium-decorative catalyst with an engineering crystal structure, the coordinatively unsaturated sites and high concentration of defects alleviate the limitations of electronic-ionic transport in solid interfaces and create a balanced gas-solid microenvironment for solid-state oxygen electrolysis. This strategy facilitates oxygen reduction reaction, mediates the transport of reaction species, and promotes the decomposition of the discharge products, contributing to a high specific capacity with a stable cycling life. Our work provides previously unknown insight into structure-property relationships in solid-state electrolysis for SSLOBs.

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Coupling two-dimensional fillers with polymer chains in solid polymer electrolyte for room-temperature dendrite-free lithium-metal batteries

Cited by 36 publications

References 38 publications

Effective transport network driven by tortuosity gradient enables high-electrochem-active solid-state batteries

Effective transport network driven by tortuosity gradient enables high-electrochem-active solid-state batteries

Solid polymer electrolytes: Ion conduction mechanisms and enhancement strategies

Tailoring electronic-ionic local environment for solid-state Li-O ₂ battery by engineering crystal structure

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Coupling two-dimensional fillers with polymer chains in solid polymer electrolyte for room-temperature dendrite-free lithium-metal batteries

Cited by 36 publications

References 38 publications

Effective transport network driven by tortuosity gradient enables high-electrochem-active solid-state batteries

Effective transport network driven by tortuosity gradient enables high-electrochem-active solid-state batteries

Solid polymer electrolytes: Ion conduction mechanisms and enhancement strategies

Tailoring electronic-ionic local environment for solid-state Li-O 2 battery by engineering crystal structure

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Product

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Tailoring electronic-ionic local environment for solid-state Li-O ₂ battery by engineering crystal structure