Jump to main content
Jump to site search


Constructing Stable Ordered Ion Channels for Solid Electrolyte Film with High Ionic Conductivity Combining the Advantages of Liquid Crystal and Ionic Liquid

Abstract

The advantages such as easy fabrication, high safety, good compatibility with Li metals of solid-state polymer electrolytes (SPEs) make SPEs as one of the most promsing electrolyte materials for next generation high performance and high safety lithium-ion batteries (LIBs). However, the traditinal used PEO-based electrolytes usually exhibit very low ionic conductivity due to the high crystallinity of PEO, which impedes the commercialization of sold-state LIBs using PEO-based polymer electrolytes. In this study, an ‘alternative’ solid electrolyte material is prepared using a nematic liquid crystal (LC) and an ionic liquid (IL). Specifically, the LC with ordered layered nanostructures is polymerized and immobilized via UV-irradiation, while IL is sufficently inserted into the ordered ion channels for fast transport ions. It should be noted that such a free-standing electrolyte film with stable ordered channels has been confirmed through the characterizaitions of DSC, POM, SEM and XRD. As a result, the solid electrolyte film shows superior comprehensive electrochemical performance in terms of a very high room temperature ionic conductivity (2.14×10-2 S cm-1), wide electrochemical window (4.8 V), and very good compatibility with lithium metal. Furthermore, the LiFePO4/Li cell using the ordered electrolyte film shows average discharge capacity of 150 mAh g-1. Undoubtedly, our study provides a new solid electrolyte material that has the potential to be used in the next generation high safety and high energy density LIBs.

Back to tab navigation

Supplementary files

Publication details

The article was received on 01 Oct 2018, accepted on 05 Dec 2018 and first published on 06 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA09489F
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
  •   Request permissions

    Constructing Stable Ordered Ion Channels for Solid Electrolyte Film with High Ionic Conductivity Combining the Advantages of Liquid Crystal and Ionic Liquid

    S. Wang, Q. Zeng, A. Wang, X. Liu, J. Chen, Z. Wang and L. Zhang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA09489F

Search articles by author

Spotlight

Advertisements