Tailoring the pseudocapacitive behavior of electrochemically deposited manganese-nickel oxide films

Mohammad H. Tahmasebi, Keyvan Raeissi, Mohammad A. Golozar, Antonello Vicenzo, Mazdak Hashempour, Massimiliano Bestetti

Результат исследований: Материалы для журналаСтатья

6 Цитирования (Scopus)

Выдержка

Manganese-nickel mixed oxide thin films were deposited by anodic electrodeposition on stainless steel substrate from an acetate solution using a potentiodynamic technique, at scan rate of 100 mV s-1 and room temperature. The effect of electrolyte pH, varied in the range from 4 to 7, on composition, morphology and capacitance behavior of oxide thin films was investigated. The nickel content in the oxide increased with increasing deposition pH, allowing to investigate the effect of the oxide composition on the capacitive behavior of as-grown manganese-nickel mixed oxides. Oxide films deposited from the electrolyte at pH 6, having a composition close to Ni0.10Mn0.90Ox showed the highest specific capacitance and the lowest charge transfer resistance. After annealing, the oxide had a complex structure of composite nature, consisting of intermixed amorphous and nanocrystalline phases. A birnessite type oxide with turbostratic disorder was identified as the major phase, in the presence of nickel hydroxide as a finely dispersed second phase. Annealing caused a drastic reduction of the charge transfer resistance and a limited increase of the specific capacitance, probably as the result of diverging effects on oxide properties, i.e. enhanced conductivity and porosity sintering. Cycle life testing of this material revealed a 25% increase of the specific capacitance over 5,000 cycles to a final value of 225 F g-1 (1 M Na2SO4, 50 mV s-1, 0.11 mg cm-2 mass loading).

Язык оригиналаАнглийский
Страницы (с-по)636-647
Число страниц12
ЖурналElectrochimica Acta
Том190
DOI
СостояниеОпубликовано - 1 фев 2016
Опубликовано для внешнего пользованияДа

Отпечаток

Nickel oxide
Manganese
Oxides
Oxide films
Nickel
Capacitance
Electrolytes
Charge transfer
Chemical analysis
Annealing
Thin films
Stainless Steel
Electrodeposition
nickel monoxide
Life cycle
Acetates
Sintering
Stainless steel
Porosity
Composite materials

ASJC Scopus subject areas

  • Electrochemistry
  • Chemical Engineering(all)

Цитировать

Tailoring the pseudocapacitive behavior of electrochemically deposited manganese-nickel oxide films. / Tahmasebi, Mohammad H.; Raeissi, Keyvan; Golozar, Mohammad A.; Vicenzo, Antonello; Hashempour, Mazdak; Bestetti, Massimiliano.

В: Electrochimica Acta, Том 190, 01.02.2016, стр. 636-647.

Результат исследований: Материалы для журналаСтатья

Tahmasebi, Mohammad H. ; Raeissi, Keyvan ; Golozar, Mohammad A. ; Vicenzo, Antonello ; Hashempour, Mazdak ; Bestetti, Massimiliano. / Tailoring the pseudocapacitive behavior of electrochemically deposited manganese-nickel oxide films. В: Electrochimica Acta. 2016 ; Том 190. стр. 636-647.
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abstract = "Manganese-nickel mixed oxide thin films were deposited by anodic electrodeposition on stainless steel substrate from an acetate solution using a potentiodynamic technique, at scan rate of 100 mV s-1 and room temperature. The effect of electrolyte pH, varied in the range from 4 to 7, on composition, morphology and capacitance behavior of oxide thin films was investigated. The nickel content in the oxide increased with increasing deposition pH, allowing to investigate the effect of the oxide composition on the capacitive behavior of as-grown manganese-nickel mixed oxides. Oxide films deposited from the electrolyte at pH 6, having a composition close to Ni0.10Mn0.90Ox showed the highest specific capacitance and the lowest charge transfer resistance. After annealing, the oxide had a complex structure of composite nature, consisting of intermixed amorphous and nanocrystalline phases. A birnessite type oxide with turbostratic disorder was identified as the major phase, in the presence of nickel hydroxide as a finely dispersed second phase. Annealing caused a drastic reduction of the charge transfer resistance and a limited increase of the specific capacitance, probably as the result of diverging effects on oxide properties, i.e. enhanced conductivity and porosity sintering. Cycle life testing of this material revealed a 25{\%} increase of the specific capacitance over 5,000 cycles to a final value of 225 F g-1 (1 M Na2SO4, 50 mV s-1, 0.11 mg cm-2 mass loading).",
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AB - Manganese-nickel mixed oxide thin films were deposited by anodic electrodeposition on stainless steel substrate from an acetate solution using a potentiodynamic technique, at scan rate of 100 mV s-1 and room temperature. The effect of electrolyte pH, varied in the range from 4 to 7, on composition, morphology and capacitance behavior of oxide thin films was investigated. The nickel content in the oxide increased with increasing deposition pH, allowing to investigate the effect of the oxide composition on the capacitive behavior of as-grown manganese-nickel mixed oxides. Oxide films deposited from the electrolyte at pH 6, having a composition close to Ni0.10Mn0.90Ox showed the highest specific capacitance and the lowest charge transfer resistance. After annealing, the oxide had a complex structure of composite nature, consisting of intermixed amorphous and nanocrystalline phases. A birnessite type oxide with turbostratic disorder was identified as the major phase, in the presence of nickel hydroxide as a finely dispersed second phase. Annealing caused a drastic reduction of the charge transfer resistance and a limited increase of the specific capacitance, probably as the result of diverging effects on oxide properties, i.e. enhanced conductivity and porosity sintering. Cycle life testing of this material revealed a 25% increase of the specific capacitance over 5,000 cycles to a final value of 225 F g-1 (1 M Na2SO4, 50 mV s-1, 0.11 mg cm-2 mass loading).

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