title: Hybrid nickel manganese oxide nanosheet-3D metallic dendrite percolation network electrodes for high-rate electrochemical energy storage.
abstract: This work reports the fabrication, by electrodeposition and post-thermal annealing, of hybrid electrodes for high rate electrochemical energy storage composed of nickel manganese oxide (Ni0.86Mn0.14O) nanosheets over 3D open porous dendritic NiCu foams. The hybrid electrodes are made of two different percolation networks of nanosheets and dendrites, and exhibit a specific capacitance value of 848 F g(-1) at 1 A g(-1). The electrochemical tests revealed that the electrodes display an excellent rate capability, characterized by capacitance retention of approximately 83% when the applied current density increases from 1 A g(-1) to 20 A g(-1). The electrodes also evidenced high charge-discharge cycling stability, which attained 103% after 1000 cycles.
authors.affiliation: CQE - Centro de Química Estrutural, Insituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal. nguyen.tuyen@tecnico.ulisboa.pt mfmontemor@tecnico.ulisboa.pt.
authors.forename: Tuyen
authors.initials: T
authors.lastname: Nguyen
authors.forename: Sónia
authors.initials: S
authors.lastname: Eugénio
authors.forename: Michel
authors.initials: M
authors.lastname: Boudard
authors.forename: Laetitia
authors.initials: L
authors.lastname: Rapenne
authors.forename: M João
authors.initials: MJ
authors.lastname: Carmezim
authors.forename: Teresa M
authors.initials: TM
authors.lastname: Silva
authors.forename: M Fátima
authors.initials: MF
authors.lastname: Montemor