Ionic liquid electrolytes based on imidazolium and tetra-alkyl-ammonium cations, coupled with bis(perfluroalkylsulfonyl)imide anions, are specifically tailored for lithium battery systems operating up to almost 5 V. Their ion transport properties and the electrochemical stability are herein reported and compared. Specifically, the effect of temperature and lithium salt incorporation as well as the nature of the main cation side group are discussed. Preliminary battery cycling tests of the selected ionic liquid electrolytes employing high-voltage, lithium-rich layered oxide positive electrodes, (i.e., Li1·2Ni0·2Mn0·6O2) are also reported. Also, potential anodic dissolution phenomena of the aluminum current collector, due to the presence of the ionic liquid electrolytes, were preliminarily investigated.

Ionic liquid electrolytes for high-voltage, lithium-ion batteries

Simonetti E.;De Francesco M.;Appetecchi G. B.
2020

Abstract

Ionic liquid electrolytes based on imidazolium and tetra-alkyl-ammonium cations, coupled with bis(perfluroalkylsulfonyl)imide anions, are specifically tailored for lithium battery systems operating up to almost 5 V. Their ion transport properties and the electrochemical stability are herein reported and compared. Specifically, the effect of temperature and lithium salt incorporation as well as the nature of the main cation side group are discussed. Preliminary battery cycling tests of the selected ionic liquid electrolytes employing high-voltage, lithium-rich layered oxide positive electrodes, (i.e., Li1·2Ni0·2Mn0·6O2) are also reported. Also, potential anodic dissolution phenomena of the aluminum current collector, due to the presence of the ionic liquid electrolytes, were preliminarily investigated.
bis(fluorosulfonyl)imide
bis(trifluoromethylsulfonyl)imide
Ethyl-methyl-imidazolium
Ionic liquids
Lithium-rich nickel-manganese oxide cathodes
Tetra-alkyl-ammonium
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12079/55443
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 32
social impact