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Title: Layer-by-Layer Assembly Strategy for Reinforcing the Mechanical Strength of an Ionogel Electrolyte without Affecting Ionic Conductivity

Abstract

The simultaneous boosting of the ionic conductivity and the mechanical strength of an ionogel electrolyte is hindered by its entrapped electrolyte. Herein, we report a promising strategy to boost the mechanical strength of an ionogel by coating it with an ultrathin layer of polyanions and polycations via layer-by-layer (LbL) assembly. The essence of our strategy is to make use of the intrinsic ionic structure of an ionogel membrane for facile LbL construction of a membrane electrolyte interface. The resulting ultrathin LbL coating enhanced the mechanical strength of the electrolyte 5-fold while maintaining its high ionic conductivity (~10–4 S cm–1 at 10 °C). The preliminary Li||LbL-LiNaf||LFP cell experiments exhibit promising electrochemical performance. This result is a significant development that will lead to the fabrication of robust membranes with liquid-like conductivity for lithium metal batteries.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1657987
Alternate Identifier(s):
OSTI ID: 1810022
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Energy Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 2; Journal ID: ISSN 2574-0962
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Layer-by-Layer (LbL) assembly; Ionogel electrolyte; Ionic liquids; Polyanions; Polycations; Lithium metal batteries (LMBs)

Citation Formats

Thapaliya, Bishnu Prasad, Popov, Ivan, and Dai, Sheng. Layer-by-Layer Assembly Strategy for Reinforcing the Mechanical Strength of an Ionogel Electrolyte without Affecting Ionic Conductivity. United States: N. p., 2019. Web. https://doi.org/10.1021/acsaem.9b01932.
Thapaliya, Bishnu Prasad, Popov, Ivan, & Dai, Sheng. Layer-by-Layer Assembly Strategy for Reinforcing the Mechanical Strength of an Ionogel Electrolyte without Affecting Ionic Conductivity. United States. https://doi.org/10.1021/acsaem.9b01932
Thapaliya, Bishnu Prasad, Popov, Ivan, and Dai, Sheng. Wed . "Layer-by-Layer Assembly Strategy for Reinforcing the Mechanical Strength of an Ionogel Electrolyte without Affecting Ionic Conductivity". United States. https://doi.org/10.1021/acsaem.9b01932. https://www.osti.gov/servlets/purl/1657987.
@article{osti_1657987,
title = {Layer-by-Layer Assembly Strategy for Reinforcing the Mechanical Strength of an Ionogel Electrolyte without Affecting Ionic Conductivity},
author = {Thapaliya, Bishnu Prasad and Popov, Ivan and Dai, Sheng},
abstractNote = {The simultaneous boosting of the ionic conductivity and the mechanical strength of an ionogel electrolyte is hindered by its entrapped electrolyte. Herein, we report a promising strategy to boost the mechanical strength of an ionogel by coating it with an ultrathin layer of polyanions and polycations via layer-by-layer (LbL) assembly. The essence of our strategy is to make use of the intrinsic ionic structure of an ionogel membrane for facile LbL construction of a membrane electrolyte interface. The resulting ultrathin LbL coating enhanced the mechanical strength of the electrolyte 5-fold while maintaining its high ionic conductivity (~10–4 S cm–1 at 10 °C). The preliminary Li||LbL-LiNaf||LFP cell experiments exhibit promising electrochemical performance. This result is a significant development that will lead to the fabrication of robust membranes with liquid-like conductivity for lithium metal batteries.},
doi = {10.1021/acsaem.9b01932},
journal = {ACS Applied Energy Materials},
number = 2,
volume = 3,
place = {United States},
year = {2019},
month = {12}
}

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