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Combining ternary, ionic liquid-based, polymer electrolytes with a single-ion conducting polymer-based interlayer for lithium metal batteries

Wan, Jiajia ; Wan, Mintao ; Hou, Xu LU orcid ; Vangosa, Francesco Briatico ; Bresser, Dominic ; Li, Jie and Paillard, Elie (2024) In Energy Materials 4.
Abstract
Among the many approaches to improve the performance of lithium-metal
batteries, ternary polyethylene oxide/ionic liquid/lithium salt
electrolytes offer several advantages such as low flammability, high
conductivity (vs. polyethylene
oxide/lithium salt electrolytes) and, to a large extent, limiting the
growth of dendrites at moderate currents. However, they suffer from
relatively low mechanical strength for lithium metal confinement.
Besides, the lithium transport numbers are very low, which is conducive
to lithium depletion during plating at high current densities at the
lithium/electrolyte interface. Thus, we show here that the combination
of a ternary solid polymer electrolyte... (More)
Among the many approaches to improve the performance of lithium-metal
batteries, ternary polyethylene oxide/ionic liquid/lithium salt
electrolytes offer several advantages such as low flammability, high
conductivity (vs. polyethylene
oxide/lithium salt electrolytes) and, to a large extent, limiting the
growth of dendrites at moderate currents. However, they suffer from
relatively low mechanical strength for lithium metal confinement.
Besides, the lithium transport numbers are very low, which is conducive
to lithium depletion during plating at high current densities at the
lithium/electrolyte interface. Thus, we show here that the combination
of a ternary solid polymer electrolyte with a single-ion polymer-based
conducting interlayer allows for a significant improvement of the
cyclability of the lithium metal anode. This results in a strong
improvement of the electrochemical performance of lithium-metal
batteries using solid polymer electrolytes at 80 °C, with an 85%
capacity retention after 350 cycles(vs. 60% after
62 cycles for the uncoated anode). This is attributed, via focused ion
beam-scanning electron microscopy and X-ray photoelectron spectroscopy,
to a denser lithium deposit, better contact with the electrolyte and a
reduced reactivity of electrolyte species with the interlayer. (Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
in
Energy Materials
volume
4
article number
400074
DOI
10.20517/energymater.2024.50
language
English
LU publication?
no
id
7203bced-6661-45eb-b25d-a73e0de74467
date added to LUP
2025-12-08 09:24:58
date last changed
2025-12-12 13:17:58
@article{7203bced-6661-45eb-b25d-a73e0de74467,
  abstract     = {{Among the many approaches to improve the performance of lithium-metal <br>
batteries, ternary polyethylene oxide/ionic liquid/lithium salt <br>
electrolytes offer several advantages such as low flammability, high <br>
conductivity (<i>vs.</i> polyethylene<br>
 oxide/lithium salt electrolytes) and, to a large extent, limiting the <br>
growth of dendrites at moderate currents. However, they suffer from <br>
relatively low mechanical strength for lithium metal confinement. <br>
Besides, the lithium transport numbers are very low, which is conducive <br>
to lithium depletion during plating at high current densities at the <br>
lithium/electrolyte interface. Thus, we show here that the combination <br>
of a ternary solid polymer electrolyte with a single-ion polymer-based <br>
conducting interlayer allows for a significant improvement of the <br>
cyclability of the lithium metal anode. This results in a strong <br>
improvement of the electrochemical performance of lithium-metal <br>
batteries using solid polymer electrolytes at 80 °C, with an 85% <br>
capacity retention after 350 cycles(<i>vs.</i> 60% after<br>
 62 cycles for the uncoated anode). This is attributed, via focused ion <br>
beam-scanning electron microscopy and X-ray photoelectron spectroscopy, <br>
to a denser lithium deposit, better contact with the electrolyte and a <br>
reduced reactivity of electrolyte species with the interlayer.}},
  author       = {{Wan, Jiajia and Wan, Mintao and Hou, Xu and Vangosa, Francesco Briatico and Bresser, Dominic and Li, Jie and Paillard, Elie}},
  language     = {{eng}},
  month        = {{07}},
  series       = {{Energy Materials}},
  title        = {{Combining ternary, ionic liquid-based, polymer electrolytes with a single-ion conducting polymer-based interlayer for lithium metal batteries}},
  url          = {{http://dx.doi.org/10.20517/energymater.2024.50}},
  doi          = {{10.20517/energymater.2024.50}},
  volume       = {{4}},
  year         = {{2024}},
}