Ionic liquid and hybrid ionic liquid/organic electrolytes for high temperature lithium-ion battery application
Artikel i vetenskaplig tidskrift, 2016

Ionic liquid (IL) and hybrid IL/organic electrolytes with pyrrolidinium cation based ILs have been investigated for application in high temperature lithium-ion batteries (HT-LIBs). The IL based electrolytes show high thermal stabilities, up to 340 degrees C, ionic conductivities of > 5 x 10(-3) S cm(-1) at 80 degrees C, and broad electrochemical stability windows: 0-5 V vs. Li+/Li degrees. The performance of LiFePO4 based half-cells at 80 degrees C is promising, delivering ca. 160 mAh g(-1) at 1C, with a rate capability up to 4C and ca. 98% coulombic efficiency. The creation of hybrid IL/organic electrolytes by adding different organic cyclic carbonate solvents reduces viscosity of the electrolytes by 28% at 80 degrees C, thereby improving the ion transport, and further improves the electrochemical performance; higher stability, better rate capability, and >= 99% coulombic efficiency. Overall, the electrolytes proposed have a potential to be applied in HT-LIBs, a concept with large advantages at the vehicle system level. (C) 2016 Elsevier Ltd. All rights reserved.

ionic liquid

high temperature

pyrrolidinium

Lithium-ion battery

organic solvents

Författare

Nareerat Plylahan

Chalmers, Fysik, Kondenserade materiens fysik

Manfred Kerner

Chalmers, Fysik, Kondenserade materiens fysik

Du Hyun Lim

Chalmers, Fysik, Kondenserade materiens fysik

Aleksandar Matic

Chalmers, Fysik, Kondenserade materiens fysik

Patrik Johansson

Chalmers, Fysik, Kondenserade materiens fysik

Electrochimica Acta

0013-4686 (ISSN)

Vol. 216 24-34

Styrkeområden

Transport

Energi

Materialvetenskap

Ämneskategorier

Atom- och molekylfysik och optik

DOI

10.1016/j.electacta.2016.08.025