Electrodeposition of Co–Mn3O4 composite coatings

Abstract

Electrolytic codeposition was employed as a low-cost alternative process to fabricate composite coatings containing Mn 3 O 4 particles in a Co matrix for potential applications in solid oxide fuel cells. The effects of codeposition parameters on the Mn 3 O 4 particle incorporation, cathode current efficiency, and coating uniformity were investigated using a Design of Experiments (DoE) approach. Concentration of Mn 3 O 4 particles in the plating solution, agitation rate, current density, and solution pH were the four factors considered in the fractional factorial 2 (4-1) design. With different combinations of the deposition parameters, the amount of Mn 3 O 4 particles incorporated in the composite coatings ranged from 0 to 12 vol.%. The DoE results indicate that the pH of the plating solution exhibited the greatest importance on both particle incorporation and current efficiency, which were decreased significantly below pH 2. The Mn 3 O 4 concentration in the plating bath showed the second strongest effect on particle incorporation, followed by the agitation rate. While the applied current density did not appear to affect the Mn 3 O 4 particle incorporation, it had a strong influence on coating thickness uniformity.

Microstructural and electrical characterization of Mn-Co spinel protective coatings for solid oxide cell interconnects

“…(Mn,Co)3O4 spinel coatings of different thickness have been produced by many different deposition techniques: slurry deposition of ceramic powders [15,[18][19][20], electrodeposition followed by oxidation [21][22][23], physical vapor deposition (PVD), thermal oxidation [24,25] and thermal spray [26][27][28][29].…”

Obtaining Mn-Co Alloys in AISI 430 Steel from Lithium-Ion Battery Recycling: Application in SOFC Interconnectors

“…The solution was kept under stirring and heating at 80 • C for 2 h [41,[45][46][47][48][49]. After cooling to room temperature, the solutions were filtered and the pH adjusted to 3.0 [27,29,[50][51][52] with the addition of sodium acetate. 49].…”

“…49]. After cooling to room temperature, the solutions were filtered and the pH adjusted to 3.0 [27,29,[50][51][52] with the addition of sodium acetate. The concentrations of the electrolyte solutions from the recycling process were analyzed by Atomic Absorption Spectrometry (Intralab model AA-1275ª) and the results, S1 and S2, are showed at Table 3.…”

Structure and properties of composite Ni–Co–Mn coatings on metal interconnects by electrodeposition

“…At present, the research mainly focuses on three aspects, namely, the deposition of Ni, Mn and Co metal multi-layer [12], the composite deposition of Co-Mn3O4 layer [13] and Ni-Mn3O4 layer [7], and Ni-Co-Mn alloy co-deposition [14,15]. Wu [16] successfully prepared Co and Co-Mn alloy layers by direct current and pulse methods.…”