Melnik, SvetlanaRyzhov, AlexanderKiselev, AlexeiRadenovic, AleksandraWeil, TanjaStevenson, Keith J.Artemov, Vasily G.2023-07-312023-07-312023-07-312023-07-1710.1021/acs.jpclett.3c01498https://infoscience.epfl.ch/handle/20.500.14299/199549WOS:001027361000001The electrodynamicsof nanoconfined water have been shownto changedramatically compared to bulk water, opening room for safe electrochemicalsystems. We demonstrate a nanofluidic "water-only" batterythat exploits anomalously high electrolytic properties of pure waterat firm confinement. The device consists of a membrane electrode assemblyof carbon-based nanomaterials, forming continuously interconnectedwater-filled nanochannels between the separator and electrodes. Theefficiency of the cell in the 1-100 nm pore size range showsa maximum energy density at 3 nm, challenging the region of the currentmetal-ion batteries. Our results establish the electrodynamic fundamentalsof nanoconfined water and pave the way for low-cost and inherentlysafe energy storage solutions that are much needed in the renewableenergy sector.Chemistry, PhysicalNanoscience & NanotechnologyMaterials Science, MultidisciplinaryPhysics, Atomic, Molecular & ChemicalChemistryScience & Technology - Other TopicsMaterials SciencePhysicssupercapacitor electrodesgraphenetransportfrictionslippagetext::journal::journal article::research article