Ionic Liquid-Based Non-Aqueous Electrolytes for Nickel/Metal Hydride Batteries
AbstractThe voltage of an alkaline electrolyte-based battery is often limited by the narrow electrochemical stability window of water (1.23 V). As an alternative to water, ionic liquid (IL)-based electrolyte has been shown to exhibit excellent proton conducting properties and a wide electrochemical stability window, and can be used in proton conducting batteries. In this study, we used IL/acid mixtures to replace the 30 wt % KOH aqueous electrolyte in nickel/metal hydride (Ni/MH) batteries, and verified the proton conducting character of these mixtures through electrochemical charge/discharge experiments. Dilution of ILs with acetic acid was found to effectively increase proton conductivity. By using 2 M acetic acid in 1-ethyl-3-methylimidazolium acetate, stable charge/discharge characteristics were obtained, including low charge/discharge overpotentials, a discharge voltage plateau at ~1.2 V, a specific capacity of 161.9 mAh·g−1, and a stable cycling performance for an AB5 metal hydride anode with a (Ni,Co,Zn)(OH)2 cathode. View Full-Text
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Meng, T.; Young, K.-H.; Wong, D.F.; Nei, J. Ionic Liquid-Based Non-Aqueous Electrolytes for Nickel/Metal Hydride Batteries. Batteries 2017, 3, 4.
Meng T, Young K-H, Wong DF, Nei J. Ionic Liquid-Based Non-Aqueous Electrolytes for Nickel/Metal Hydride Batteries. Batteries. 2017; 3(1):4.Chicago/Turabian Style
Meng, Tiejun; Young, Kwo-Hsiung; Wong, Diana F.; Nei, Jean. 2017. "Ionic Liquid-Based Non-Aqueous Electrolytes for Nickel/Metal Hydride Batteries." Batteries 3, no. 1: 4.