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Synthèse et propriétés de monocristaux, de poudres, films minces ou hétérostructures

Etudes à l'interface avec la matière biologique

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Nouvelle publication FM2N par T. Nguyen

Publié le 15 octobre 2015
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Communiqué 27 avril 2015

Le papier "Morphological changes and electrochemical response of mixed nickel manganese oxides as charge storage electrodes" a été publié dans Journal of Materials Chemistry A.

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JMA_2015.gif

Vous trouverez ici le papier de Tuyen Nguyen. Voici l'abstract:

"Nickel manganese (Ni–Mn) oxide films were prepared by potentiostatic  electrodeposition over stainless steel and post-thermal annealing at 250 °C. Morphological and structural changes were observed depending on the Ni to Mn ratio in the electrolyte. Single-phase Ni1-xMnxO oxide was formed at low Mn content, whereas two phases composed of Ni1-xMnxO and NixMn3-xO4 were formed at high Mn content. Electrochemical studies revealed an increase of the specific capacitance of the mixed Ni–Mn oxide electrodes compared to the single metal oxides, thus pin-pointing a synergistic effect. The Ni–Mn oxide film displayed a specific capacitance of about 300 F g-1 in a potential window of 0.5 V at an applied current density of 1 A g-1. The rate capability of the oxides was 58% when the applied current was increased from 1 A g-1 to 10 A g-1. The Ni–Mn oxide film exhibits excellent cycling stability with 100% capacitance retention after 1500 cycles."
DOI: 10.1039/C5TA01453K
 
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mise à jour le 16 octobre 2019

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