期刊
BATTERIES-BASEL
卷 3, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/batteries3010004
关键词
ionic liquid (IL); non-aqueous electrolyte; nickel/metal hydride (Ni/MH) batteries
资金
- U.S. Department of Energy's Advanced Research Project Agency-Energy (ARPA-E) under the Robust Affordable Next Generation EV-storage (RANGE) Program [DE-AR0000386]
The 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 similar to 1.2 V, a specific capacity of 161.9 mAh.g(-1), and a stable cycling performance for an AB(5) metal hydride anode with a (Ni,Co,Zn)(OH)(2) cathode.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据