Li transport properties of sulfolane-based gel polymer electrolyte and effective suppression of lithium polysulfide dissolution in lithium-sulfur batteries

Sulfolane (SL)-based gel polymer electrolytes composed of a polyether-based host polymer were investigated for long-lifecycle lithium-sulfur batteries. The proposed electrolytes were expected to cause chemical and physical suppression of Li 2 S n dissolution and diffusion owing to the low Li 2 S n s...

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Published inSustainable energy & fuels Vol. 6; no. 18; pp. 4218 - 4226
Main Authors Miyauchi, Hibiki, Inaba, Kohei, Takahashi, Keitaro, Arai, Nana, Umebayashi, Yasuhiro, Seki, Shiro
Format Journal Article
LanguageEnglish
Published London Royal Society of Chemistry 13.09.2022
Subjects
Diffusion
Discharge
Dissolution
Electrolytes
Electrolytic cells
Life cycle analysis
Lithium
Lithium sulfur batteries
Physical control
Polymers
Raman spectroscopy
Sulfolane
Sulfur
Transport properties
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Summary:Sulfolane (SL)-based gel polymer electrolytes composed of a polyether-based host polymer were investigated for long-lifecycle lithium-sulfur batteries. The proposed electrolytes were expected to cause chemical and physical suppression of Li 2 S n dissolution and diffusion owing to the low Li 2 S n solubility, derived from the highly concentrated SL-based electrolytes, and low Li 2 S n diffusion, derived from the host polymer, respectively. The Li + transport properties, and Li + -SL and Li + -anion interactions, were analyzed by alternating current impedance measurements and Raman spectroscopy, respectively. The relationships between gel polymer electrolyte composition and Li + coordination structure/Li + transport properties were also investigated. The Li-S cells containing gel polymer electrolytes exhibited a sufficient discharge capacity in the first cycle (approx. 1150 mA h g −1 ) and stable charge discharge operation for 100 cycles. Application of the proposed electrolytes resulted in high battery performance owing to chemical and physical control of Li 2 S n dissolution and diffusion, and favorable electrolyte/Li metal interface formation. New-type sulfolane gel electrolytes exhibited high battery performance owing to chemical and physical control of Li 2 S n dissolution and diffusion properties.
Bibliography:https://doi.org/10.1039/d2se00711h
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ISSN:2398-4902
2398-4902
DOI:10.1039/d2se00711h