Ambient temperature liquid salt electrolytes
Artikel i vetenskaplig tidskrift, 2023

Alkali metal salts usually have high melting points due to strong electrostatic interactions and solvents are needed to create ambient temperature liquid electrolytes. Here, we report on six phosphate-anion-based alkali metal salts, Li/Na/K, all of which are liquids at room temperature, with glass transition temperatures ranging from −61 to −29 °C, and are thermally stable up to at least 225 °C. While the focus herein is on various physico-chemical properties, these salts also exhibit high anodic stabilities, up to 6 V vs. M/M+ (M = Li/Na/K), and deliver some battery performance - at elevated temperatures as there are severe viscosity limitations at room-temperature. While the battery performance arguably is sub-par, solvent-free electrolytes based on alkali metal salts such as these should pave the way for conceptually different Li/Na/K-batteries, either by refined anion design or by using several salts to create eutectic mixtures.

Room temperature

Electric batteries

Glass transition

Alkali metal salts


Sourav Bhowmick

Luleå tekniska universitet

Mukhtiar Ahmed

Luleå tekniska universitet

Andrei Filippov

Luleå tekniska universitet

Laura Loaiza Rodriguez

Chalmers, Fysik, Materialfysik

Faiz Ullah Shah

Luleå tekniska universitet

Patrik Johansson

Chalmers, Fysik, Materialfysik

Centre national de la recherche scientifique (CNRS)

Chemical Communications

1359-7345 (ISSN) 1364-548X (eISSN)

Vol. 59 18 2620-2623




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