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Confinement-Controlled Water Engenders Unusually High Electrochemical Capacitance.

ABSTRACT: The electrodynamics of nanoconfined water have been shown to change dramatically compared to bulk water, opening room for safe electrochemical systems. We demonstrate a nanofluidic "water-only" battery that exploits anomalously high electrolytic properties of pure water at firm confinement. The device consists of a membrane electrode assembly of carbon-based nanomaterials, forming continuously interconnected water-filled nanochannels between the separator and electrodes. The efficiency of the cell in the 1-100 nm pore size range shows a maximum energy density at 3 nm, challenging the region of the current metal-ion batteries. Our results establish the electrodynamic fundamentals of nanoconfined water and pave the way for low-cost and inherently safe energy storage solutions that are much needed in the renewable energy sector.

SUBMITTER: Melnik S

PROVIDER: S-EPMC10388349 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature

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Confinement-Controlled Water Engenders Unusually High Electrochemical Capacitance.

Melnik Svetlana S Ryzhov Alexander A Kiselev Alexei A Radenovic Aleksandra A Weil Tanja T Stevenson Keith J KJ Artemov Vasily G VG

The journal of physical chemistry letters 20230717 29

The electrodynamics of nanoconfined water have been shown to change dramatically compared to bulk water, opening room for safe electrochemical systems. We demonstrate a nanofluidic "water-only" battery that exploits anomalously high electrolytic properties of pure water at firm confinement. The device consists of a membrane electrode assembly of carbon-based nanomaterials, forming continuously interconnected water-filled nanochannels between the separator and electrodes. The efficiency of the ce ...[more]

PMID: 37458683

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