MnO2-coated Ni nanorods: Enhanced High Rate Behavior in Pseudo-Capacitive Supercapacitor

Yannick Lei (1) , Barbara Daffos (2) , Pierre-Louis. Taberna (2) , Patrice Simon (2) , Frédéric Favier (1)

1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

Ni nanorods prepared by electrochemical growth through an anodized aluminium oxide membrane were used as substrate for the electrodeposition of MnO2 either in potentiostatic mode or by a pulsed method. Electrochemical deposition parameters were chosen for an homogeneous deposit onto Ni nanorods. Resulting Ni supportedMnO2 electrodes were tested for electrochemical performances as nanostructured negative electrodes for supercapacitors. They exhibited initial capacitances up to 190 F/g and remarkable performances at high charge/discharge rates.

Domaines: Matériaux

Yannick Lei, Barbara Daffos, Pierre-Louis. Taberna, Patrice Simon, Frédéric Favier. MnO2-coated Ni nanorods: Enhanced High Rate Behavior in Pseudo-Capacitive Supercapacitor. Electrochimica Acta, 2010, 55 (25), pp.7454. ⟨10.1016/j.electacta.2010.03.012⟩. ⟨hal-00560483⟩