Functional ionic liquids: Cationic SEI-formers for lithium batteries
Artikel i vetenskaplig tidskrift, 2019

More stable electrolytes for lithium-ion batteries are urgently needed, and apart from general improvements in thermal and electrochemical stabilities, both stability, safety and performance are connected with the formation of the solid electrolyte interphase (SEI) layer at the negative electrode. A high performant SEI-layer; thin, uniform, highly ion conducting, etc., is difficult to achieve and proper control of its formation process is therefore highly desirable. The idea presented here is based on computational screening of a wide range of modifications of wellknown ionic liquid (IL) cations towards better ability to form SEI-layers - i.e. acting as SEI-formers. Different cation chemistries and kinds of structural modifications were tested, with introduction of nitrile groups and/or double bonds resulting to be the most promising. The latter is outlined as especially beneficial, as apart from enabling an easier initiation reaction it provides a site for polymerization, resulting in polymeric SEI-products poly (IL) s (PILs), which can be expected to provide both protection of the electrode surface and fast Li thorn transport.

Lithium battery

Battery electrolyte

Ionic liquids

Solid electrolyte interphase

Författare

Piotr Jankowski

Centre national de la recherche scientifique (CNRS)

Chalmers, Fysik, Kondenserade materiens fysik

Politechnika Warszawska

Wladyslaw Wieczorek

Centre national de la recherche scientifique (CNRS)

Politechnika Warszawska

Patrik Johansson

Chalmers, Fysik, Kondenserade materiens fysik

Centre national de la recherche scientifique (CNRS)

Energy Storage Materials

2405-8297 (eISSN)

Vol. 20 108-117

Nästa generation batterier för hybrid- och elfordon

Energimyndigheten, 2013-12-01 -- 2017-12-31.

Ämneskategorier

Oorganisk kemi

Materialkemi

Annan kemi

Styrkeområden

Transport

Energi

Materialvetenskap

DOI

10.1016/j.ensm.2019.04.024

Mer information

Senast uppdaterat

2019-12-16