Selective membrane may cycle dual-ion batteries closer to reality

https://phys.org/news/2022-01-membrane-dual-ion-batteries-closer-reality.html

"The researchers focused on hexafluorophosphate, an anionic component in lithium-ion batteries. They employed an important monomer containing quaternary ammonium motifs—which are positively charged—to develop a polymer electrolyte membrane that can selectively filter anions. It resulted in superb cycling stability with a 99% coulombic efficiency at high voltage"

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