Pyrrolidium- and Imidazolium-Based Ionic Liquids and Electrolytes with Flexible Oligoether Anions
Artikel i vetenskaplig tidskrift, 2024

A new class of fluorine-free ionic liquids (ILs) and electrolytes based on aliphatic flexible oligoether anions, 2-(2-methoxyethoxy)acetate (MEA) and 2-[2-(2-methoxyethoxy)ethoxy]acetate (MEEA), coupled with pyrrolidinium and imidazolium cations is introduced. For the ILs with MEEA anions, Li+ conducting electrolytes are created by doping the ILs with 30 mol % of LiMEEA. The structural flexibility of the oligoether functionality in the anion results in glass transition temperatures (Tg) as low as −60 °C for the neat ILs and the electrolytes. The imidazolium-based ILs and electrolytes reveal better thermal stabilities but higher Tg and lower electrochemical stabilities than the corresponding pyrrolidinium-based analogues. All neat ILs show comparable transport properties for the cations and these decrease by the addition of lithium salt – the pyrrolidinium-based electrolyte being affected the most.

lithium-ion batteries

NMR diffusometry

Fluorine-free ionic liquids

electrochemistry

electrolytes

Författare

Mukhtiar Ahmed

Luleå tekniska universitet

Andrei Filippov

Luleå tekniska universitet

Patrik Johansson

Chalmers, Fysik, Materialfysik

Faiz Ullah Shah

Luleå tekniska universitet

ChemPhysChem

1439-4235 (ISSN) 1439-7641 (eISSN)

Vol. 25 9 e202300810

Säkrare batterier via "klick-kemi"-skapade flourfria elektrolyter

Energimyndigheten (48194-1), 2020-01-01 -- 2023-12-31.

Drivkrafter

Hållbar utveckling

Ämneskategorier

Energiteknik

Den kondenserade materiens fysik

Styrkeområden

Energi

Materialvetenskap

DOI

10.1002/cphc.202300810

PubMed

38349198

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Senast uppdaterat

2024-05-18