Preparation of safe water-lipid mixed electrolytes for application in ion capacitor

Impact Factor:8.455

DOI number:10.1016/j.cclet.2020.12.025

Journal:Chinese Chemical Letters

Key Words:Aqueous electrolytes are safe, economic, and environmentally friendly. However, they have a narrow potential window. On the other hand, organic electrolytes exhibit good thermodynamic stability but are inflammable and moisture sensitive. In this study, we prepared water-PEG-lipid ternary electrolytes (TEs). To combine the advantages of water, polyethylene glycol (PEG) and propylene carbonate (PC). The nonflammable mixed electrolytes exhibited a wide potential window of about 2.8 V due to the beneficial effects of PEG and PC. Using these TEs, a lithium manganate-active carbon ion capacitor could be operated at 2.4 V with an energy density of 32 Wh/kg, based on the total active electrode material (current density of 3.3 mA/cm(2)). This value was significantly higher than that achieved using an aqueous electrolyte, thereby rationalizing the higher energy density.

Indexed by:Journal paper

Volume:32

Issue:6

Page Number:2009-2012

Translation or Not:no

Date of Publication:2021-01-01