Preparation of Nickel and Manganese Oxides Composite via Co-Precipitation Method and its Supercapacitive Performance

Zhong Yang Wang; Run Hua Fan; Qian Qian Li; Lei Qian

doi:10.4028/www.scientific.net/KEM.727.770

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 727Preparation of Nickel and Manganese Oxides...

Preparation of Nickel and Manganese Oxides Composite via Co-Precipitation Method and its Supercapacitive Performance

Abstract:

The nickel and manganese oxides (Ni-Mn oxides) were prepared by a simple co-precipitation process with sodium carbonate (Na₂CO₃) as precipitant. The products are the mixture of nickel oxides, manganese oxides and their solid solution. The phase and morphology of the synthesized product were characterized by X-ray diffraction and field emission scanning electron microscope. The electrochemical capacitive characterization was performed using cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrical impedance spectroscopy (EIS) measurements in a 6mol/L KOH aqueous solution electrolyte. The result shows that a maximal specific capacitance value when stoichiometric amounts of NiCl₂and MnCl₂ are equal (cationic ratio of Ni:Mn=1:1) which the specific capacitance is 110 F/g (at a current density of 1A/g). Overall we found that the nickel and manganese oxides have better electrochemical performance compared to the single parts, and while the introduction of nickel oxides can further improve the performance.

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Key Engineering Materials (Volume 727)

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770-774

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https://doi.org/10.4028/www.scientific.net/KEM.727.770

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Online since:

January 2017

Authors:

Zhong Yang Wang, Run Hua Fan*, Qian Qian Li, Lei Qian

Keywords:

Co-Precipitation Method, Electrochemical Property, Manganese Oxide, Nickel Oxide

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