Charge distributions in poly(ethylene oxide)-based electrolytes for lithium-ion batteries

Faliya, Kapil; Kliem, H.

doi:10.1016/j.electacta.2018.09.022

Cited by 8 publications

(3 citation statements)

References 26 publications

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“…The result shows that the surface potential around the filler is not affected by the polarity and magnitude of the applied bias. Moreover, the charge oscillations visible can be detected on the dielectric [44], and the surface potential difference (V CPD ) between the tip and sample is basically 0. If the noise factor is neglected, there is no potential difference between matrix and filler (figure S2).…”

Section: Kpfm Measurementmentioning

confidence: 99%

Local charge transport at different interfaces in epoxy composites

Jia¹,

Zhou²,

Chen³

et al. 2022

Nanotechnology

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Charge transport in insulating composites is fundamental to designing high performance in electrical breakdown strength processes. A fundamental understanding of the charge transport at nanoscale in insulating composites remains elusive. Herein, we fabricate two types of interfaces in epoxy (EP) composites (Al2O3/EP and bubble/EP, respectively). Then the local dynamic charge mobility behavior and charge density are explored using in-situ Kelvin probe force microscopy (KPFM). After the external voltage in the horizontal direction is applied, significant differences are demonstrated in the evolution of charge transport for epoxy matrix, filler/bubble, and their interface, respectively. The interface between Al2O3 and epoxy is easier to accumulate the negative charges and introduce shallow traps. Lots of positive charges are located around a bubble where deeper traps are present and could prevent charge migration. Thus, this work offers extended experimental support to understanding the mechanism of charge transport in dielectric composites.

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Section: Kpfm Measurementmentioning

confidence: 99%

Local charge transport at different interfaces in epoxy composites

Jia¹,

Zhou²,

Chen³

et al. 2022

Nanotechnology

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“…Low ionic conductivity of SSEs is one of the major limitations of ASSLBs, especially for polymer-based SSEs, such as poly(ethylene oxide) (PEO), − poly(vinylidene fluoride) (PVDF) and its copolymer with hexafluoropropylene (PVDF-HFP), − polyacrylonitrile (PAN), − and poly(methyl methacrylate) (PMMA). − The low ionic conductivity of 10 –8 ∼10 –5 S cm –1 at room temperature for polymer SSEs is an unavoidable challenge, even though they have the superiority of high flexibility and good interface contact with the electrodes. Therefore, various advanced inorganic SSEs with different structures have been developed in recent years.…”

Section: Introductionmentioning

confidence: 99%

Status and Prospect of Two-Dimensional Materials in Electrolytes for All-Solid-State Lithium Batteries

Lan,

Luo,

et al. 2024

ACS Nano

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Replacing liquid electrolytes and separators in conventional lithium-ion batteries with solid-state electrolytes (SSEs) is an important strategy to ensure both high energy density and high safety. Searching for fast ionic conductors with high electrochemical and chemical stability has been the core of SSE research and applications over the past decades. Based on the atomic-level thickness and infinitely expandable planar structure, numerous two-dimensional materials (2DMs) have been exploited and applied to address the most critical issues of low ionic conductivity of SSEs and lithium dendrite growth in all-solidstate lithium batteries. This review introduces the research process of 2DMs in SSEs, then summarizes the mechanisms and strategies of inert and active 2DMs toward Li + transport to improve the ionic conductivity and enhance the electrode/ SSE interfacial compatibility. More importantly, the main challenges and future directions for the application of 2DMs in SSEs are considered, including the importance of exploring the relationship between the anisotropic structure of 2DMs and Li + diffusion behavior, the exploitation of more 2DMs, and the significance of in situ characterizations in elucidating the mechanisms of Li + transport and interfacial reactions. This review aims to provide a comprehensive understanding to facilitate the application of 2DMs in SSEs.

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“…[3][4][5][6] Extensive investigation has been conducted on four types of solid-state electrolytes to broaden the potential application areas of ASSLMB. These electrolytes include solid polymer electrolytes (SPEs), [7,8] inorganic ceramic oxides (ICEs), [9,10] sulfide electrolytes (SEs), [11,12] and halide electrolytes (HEs). [13,14] SEs and HEs are highly sensitive to air, while ICEs exhibit a higher interfacial impedance.…”

Section: Introductionmentioning

confidence: 99%

Building Bulk and Interface Dual Fast Li⁺ Conducting Pathway in Composite Solid Polymer Electrolyte Membrane for All–Solid–State Lithium–Metal Batteries

He,

Tang,

Huang

et al. 2024

Batteries & Supercaps

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Solid polymer electrolytes (SPEs) are considered a promising solution to the safety problems of lithium‐ion batteries (LIBs) using liquid electrolytes. However, the high crystallinity and low ionic conductivity hinder the practical application of SPEs. Herein, we design a composite solid polymer electrolyte with a dual fast Li+ conducting pathway in bulk and interface by incorporating highly Li+ conductive ceramic Li6.4Ga0.2La3Zr2O12 (LGLZO) in polyethylene oxide (PEO)/Li‐bis (trifluoromethanesulfonyl) imide (LiTFSI) system. Compared to Li6.5La3Zr1.5Ta0.5O12 (LLZTO), LGLZO provides better Li+ conductivity; therefore, a fast Li+ conducting pathway will form in the bulk of LGLZO nanofillers. Besides, LGLZO nanofiller accelerates the dissociation of LiTFSI and benefits the transfer of free Li+ through the SPEs near the LGLZO surface, forming another interface fast Li+ conducting pathway in the SPEs. Benefits from the dual fast Li+ pathway design, the composite electrolyte membrane with 15wt% LGLZO nanoparticles presents a high ionic conductivity of 8.0 × 10−4 S cm−1 at 60 °C. The Li‐Li symmetric cells with optimized content LGLZO show good cycling stability (no short circuit even after 1000 h), and the all‐solid Li/LiFePO4 batteries exhibit excellent cycling performance (remained 154 mAh g−1 after 500 cycles at 0.2 C under 60 °C).

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Charge distributions in poly(ethylene oxide)-based electrolytes for lithium-ion batteries

Cited by 8 publications

References 26 publications

Local charge transport at different interfaces in epoxy composites

Local charge transport at different interfaces in epoxy composites

Status and Prospect of Two-Dimensional Materials in Electrolytes for All-Solid-State Lithium Batteries

Building Bulk and Interface Dual Fast Li⁺ Conducting Pathway in Composite Solid Polymer Electrolyte Membrane for All–Solid–State Lithium–Metal Batteries

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Charge distributions in poly(ethylene oxide)-based electrolytes for lithium-ion batteries

Cited by 8 publications

References 26 publications

Local charge transport at different interfaces in epoxy composites

Local charge transport at different interfaces in epoxy composites

Status and Prospect of Two-Dimensional Materials in Electrolytes for All-Solid-State Lithium Batteries

Building Bulk and Interface Dual Fast Li+ Conducting Pathway in Composite Solid Polymer Electrolyte Membrane for All–Solid–State Lithium–Metal Batteries

Contact Info

Product

Resources

About

Building Bulk and Interface Dual Fast Li⁺ Conducting Pathway in Composite Solid Polymer Electrolyte Membrane for All–Solid–State Lithium–Metal Batteries