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

Water and lipid were mixed using amphiphilic polymers to prepare ternary electrolytes, which have the combined advantages of water and organic solvents. [Display omitted] Aqueous electrolytes are safe, economic, and environmentally friendly. However, they have a narrow potential window. On the other...

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Bibliographic Details
Published in:Chinese chemical letters 2021-06, Vol.32 (6), p.2009-2012
Main Authors: Huang, Miaofeng, Tang, Aihua, Wang, Zhenyin, Shi, Jingkun, Jiang, Xiaoping, Wan, Chubin, Ju, Xin
Format: Article
Language:English
Subjects:
Ion capacitor
Moisture tolerant
Safe electrolytes
Ternary electrolyte
Water–lipid mixed
Wide potential window
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Summary:Water and lipid were mixed using amphiphilic polymers to prepare ternary electrolytes, which have the combined advantages of water and organic solvents. [Display omitted] 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/cm2). This value was significantly higher than that achieved using an aqueous electrolyte, thereby rationalizing the higher energy density.
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2020.12.025