期刊
ACS ENERGY LETTERS
卷 7, 期 11, 页码 4118-4128出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.2c01551
关键词
-
类别
资金
- Joint Center for Energy Storage Research (JCESR), an Energy Innovation Hub - U.S. Department of Energy, Office of Science, Basic Energy Sciences
- Cornell University
In this study, a new type of polyethylene membrane was used to address membrane swelling in organic solvents, and remarkable results were achieved with high capacity retention and low crossover.
Redox flow batteries (RFBs) are a promising solution to grid-scale energy storage that utilize solvated redox-active species to store charge. These electrolytes are flowed over stationary electrodes during charge and discharge cycling. However, solubilizing the charge storage species allows for their crossover through the separating membrane, causing electrolyte mixing, and leads to capacity fade and battery failure. Herein, we employ a series of trimethylammonium-functionalized polyethylene membranes in RFB cells to address membrane swelling in organic solvent while maintaining high counterion (PF6-) conduction. We show unprecedented results with 99.99% average capacity retention per cycle and 88% total capacity retention through 1000 charge/discharge cycles with low crossover, as compared to a commercial membrane often used in nonaqueous RFB (NARFB) studies which retained 36% capacity. Our results represent a critical step in developing and understanding anion-exchange membranes (AEMs) as separators for NARFBs and other electrochemical systems employing organic solvents.
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