Negatively charged nanoporous membrane for a dendrite-free alkaline zinc-based flow battery with long cycle life
ZZ Yuan and XQ Liu and WB Xu and YQ Duan and HM Zhang and XF Li, NATURE COMMUNICATIONS, 9, 3731 (2018).
Alkaline zinc-based flow batteries are regarded to be among the best choices for electric energy storage. Nevertheless, application is challenged by the issue of zinc dendrite/accumulation. Here, we report a negatively charged nanoporous membrane for a dendrite-free alkaline zinc-based flow battery with long cycle life. Free of zinc dendrite/accumulation, stable performance is afforded for similar to 240 cycles at current densities ranging from 80 to 160 mA cm(-2) using the negatively charged nanoporous membrane. Furthermore, 8 h and 7 h plating/stripping processes at 40 mA cm(-2) yield an average energy efficiency of 91.92% and an areal discharge capacity above 130 mAh cm(-2). A peak power density of 1056 mW cm(-2) is achieved at 1040 mA cm(-2). This study may provide an effective way to address the issue of zinc dendrite/accumulation for zinc-based batteries and accelerate the advancement of these batteries.
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