Preparation of safe water–lipid mixed electrolytes for application in ion capacitor |
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摘 要: | 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 m A/cm~2). This value was significantly higher than that achieved using an aqueous electrolyte, thereby rationalizing the higher energy density.
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收稿时间: | 1 April 2020 |
Preparation of safe water–lipid mixed electrolytes for application in ion capacitor |
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Authors: | Miaofeng Huang Aihua Tang Zhenyin Wang Jingkun Shi Xiaoping Jiang Chubin Wan Xin Ju |
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Institution: | 1. University of Science and Technology Beijing, Beijing 100083, China;2. Qilu University of Technology (Shandong Academy of Sciences), Ji’nan 250014, China |
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Abstract: | 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. |
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Keywords: | Safe electrolytes Wide potential window Ion capacitor Moisture tolerant Ternary electrolyte Water–lipid mixed |
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