Negatively charged nanoporous membrane for a dendrite-free alkaline zinc-based flow battery with long cycle life.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 30213938.
- Also identified by DOI 10.1038/s41467-018-06209-x and PMC identifier 6137156.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
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 ∼240 cycles at current densities ranging from 80 to 160 mA cm<sup>-2</sup> using the negatively charged nanoporous membrane. Furthermore, 8 h and 7 h plating/stripping processes at 40 mA cm<sup>-2</sup> yield an average energy efficiency of 91.92% and an areal discharge capacity above 130 mAh cm<sup>-2</sup>. A peak power density of 1056 mW cm<sup>-2</sup> is achieved at 1040 mA cm<sup>-2</sup>. 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.