• Energy Research

Ionic liquids (ILs) based on sulfonylamide-type anions have gained widespread utility as electrolytes for secondary batteries. Although sulfonylamide-based IL electrolytes are known to form a stable passivation layer that prevents Al corrosion, the Al electrode in the Na[FSA]-[C2C1im][FSA] ([FSA] = bis(fluorosulfonyl)amide and [C2C1im] = 1-ethyl-3-methylimidazolium) IL, is found to be afflicted by pitting corrosion at potentials above 4 V vs Na+/Na during electrochemical measurement at 90 °C. Therefore, this study investigates the suppressive effect of [FAP]− (FAP = tris(pentafluoroethyl)trifluorophosphate) on the Al corrosion behavior of the IL electrolyte. Here, the inhibited corrosion of the Al electrode is confirmed through a series of cyclic voltammetry measurements, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Charge-discharge tests performed using a Na3V2(PO4)2F3 positive electrode demonstrates that the addition of [FAP]– into the IL enhances cycling performance at the intermediate temperature of 90 °C.

Ionic liquids (ILs) based on sulfonylamide-type anions have gained widespread utility as electrolytes for secondary batteries. Although sulfonylamide-based IL electrolytes are known to form a stable passivation layer that prevents Al corrosion, the Al electrode in the Na[FSA]-[C2C1im][FSA] ([FSA] = bis(fluorosulfonyl)amide and [C2C1im] = 1-ethyl-3-methylimidazolium) IL, is found to be afflicted by pitting corrosion at potentials above 4 V vs Na+/Na during electrochemical measurement at 90 °C. Therefore, this study investigates the suppressive effect of [FAP]− (FAP = tris(pentafluoroethyl)trifluorophosphate) on the Al corrosion behavior of the IL electrolyte. Here, the inhibited corrosion of the Al electrode is confirmed through a series of cyclic voltammetry measurements, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Charge-discharge tests performed using a Na3V2(PO4)2F3 positive electrode demonstrates that the addition of [FAP]– into the IL enhances cycling performance at the intermediate temperature of 90 °C.

This review summarises the properties and electrochemical performance of pseudo-solid-state electrolytes prepared using ionic liquids, along with insights into design strategies to improve their application in various secondary batteries.

This review summarises the properties and electrochemical performance of pseudo-solid-state electrolytes prepared using ionic liquids, along with insights into design strategies to improve their application in various secondary batteries.

This review summarizes the use of ionic liquids in Na secondary batteries and discusses their electrochemical performance with various electrode materials.

This review summarizes the use of ionic liquids in Na secondary batteries and discusses their electrochemical performance with various electrode materials.

A sustainable closed-loop system has been developed to prepare heterosite FePO4 from LiFePO4 through chemical delithiation using O2 in an acetic acid aqueous solution. This process recovers lithium acetate, which can be reproduced as LiFePO4.

A sustainable closed-loop system has been developed to prepare heterosite FePO4 from LiFePO4 through chemical delithiation using O2 in an acetic acid aqueous solution. This process recovers lithium acetate, which can be reproduced as LiFePO4.