title: Ultrafast Dischargeable LiMn2O4Thin-Film Electrodes with Pseudocapacitive Properties for Microbatteries.
abstract: LiMn2O4(LMO) thin films are deposited on Si-based substrates with Pt current collector via multi-layer pulsed-laser-deposition technique. The LMO thin films feature unique kinetics that yield outstanding electrochemical cycling performance in an aqueous environment. At extremely high current densities of up to 1880 μA cm-2(≈ 348 C), a reversible capacity of 2.6 μAh cm-2is reached. Furthermore, the electrochemical cycling remains very stable for over 3500 cycles with a remarkable capacity retention of 99.996% per cycle. We provide evidence of significant nondiffusion-controlled, pseudocapacitive-like storage contribution of the LMO electrode.
authors.affiliation: IREC , Jardins de les Dones de Negre 1, 2a, 08930 Sant Adrià de Besós, Barcelona, Spain.
authors.forename: Marcus
authors.identifier: http://orcid.org/0000-0001-8650-6974
authors.initials: M
authors.lastname: Fehse
authors.affiliation: IREC , Jardins de les Dones de Negre 1, 2a, 08930 Sant Adrià de Besós, Barcelona, Spain.
authors.forename: Rafael
authors.initials: R
authors.lastname: Trócoli
authors.affiliation: Analytische Chemie-Elektroanalytik and Sensorik Ruhr-Universität Bochum, Universitätsstr. 150, 44780 Bochum, Germany.
authors.forename: Edgar
authors.identifier: http://orcid.org/0000-0002-8993-4285
authors.initials: E
authors.lastname: Ventosa
authors.affiliation: IREC , Jardins de les Dones de Negre 1, 2a, 08930 Sant Adrià de Besós, Barcelona, Spain.
authors.forename: Elba
authors.initials: E
authors.lastname: Hernández
authors.affiliation: Imec, Kapeldreef 75, B-3001 Leuven, Belgium.
authors.forename: Alfonso
authors.initials: A
authors.lastname: Sepúlveda
authors.affiliation: IREC , Jardins de les Dones de Negre 1, 2a, 08930 Sant Adrià de Besós, Barcelona, Spain.
authors.forename: Alex
authors.initials: A
authors.lastname: Morata
authors.affiliation: IREC , Jardins de les Dones de Negre 1, 2a, 08930 Sant Adrià de Besós, Barcelona, Spain.
authors.forename: Albert
authors.initials: A
authors.lastname: Tarancón
keywords: LiMn2O4; lithium ion batteries; microbatteries; pseudocapacitive storage; thin-film batteries