Ionic liquid and hybrid ionic liquid/organic electrolytes for high temperature lithium-ion battery application

Plylahan, Nareerat,1984Chalmers tekniska högskola,Chalmers University of Technology (author)

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.

Kerner, Manfred,1984Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)kerner (author)
Lim, Du Hyun,1983Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)duhyun (author)
Matic, Aleksandar,1968Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)matic (author)
Johansson, Patrik,1969Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jpatrik (author)
Chalmers tekniska högskola (creator_code:org_t)

By the author/editor: Plylahan, Nareer ...; Kerner, Manfred, ...; Lim, Du Hyun, 19 ...; Matic, Aleksanda ...; Johansson, Patri ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Atom and Molecul ...

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