Preparation of NiAl coated Nickel foam cathode for Alkaline Water Electrolysis using Atmospheric Plasma Spraying

2020 ◽  
pp. 5916-5926
Author(s):  
Xinghua Liang ◽  
Keyword(s):  
Plasma Spraying ◽  
Nickel Foam ◽  
Water Electrolysis ◽  
Atmospheric Plasma Spraying ◽  
Atmospheric Plasma ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water

Radio-Frequency Suspension Plasma Spraying of Cobalt Spinel Anodes for Alkaline Water Electrolysis

1998 ◽  
Author(s):  
M. Mueller ◽  
R. Henne ◽  
G. Schiller ◽  
M.I. Boulos ◽  
F. Gitzhofer ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Plasma Spraying ◽  
Oxygen Plasma ◽  
Solid Phase ◽  
Water Electrolysis ◽  
Suspension Plasma Spraying ◽  
Alkaline Water Electrolysis ◽  
Spherical Powder ◽  
Alkaline Water ◽  
Cobalt Spinel

Abstract Suspensions of cobalt spinel (Co3O4) powders (median size 6 µm and 0.3 µm) were r.f. plasma sprayed to form electrocatalytically active anode layers for alkaline water electrolysis. Stable cobalt oxide suspensions of low viscosity and exceeding 50wt.% solid phase content have been processed. A spheroidization study revealed the formation of large spherical powder particles (- 30 + 80 µm). Cobalt oxide coatings were produced by this novel r.f.-Suspension Plasma Spraying (SPS) method. The porosity was controlled by optimizing the spray distance and the reactor pressure. The main disadvantage of the thermal plasma processing of cobalt spinel, i.e. the decomposition of the spinel phase into CoO, could not be prevented, not even with the application of an 80% oxygen plasma. With a relatively low power oxygen plasma post-treatment the deposited CoO layers can be oxidized to Co3O4 resulting in a promising improvement of the electrochemical performance of the anode layers.

Evaluation of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysers

2013 ◽  
Vol 38 (34) ◽  
pp. 14380-14390 ◽  
Author(s):  
Daniel Chade ◽  
Leonard Berlouis ◽  
David Infield ◽  
Andrew Cruden ◽  
Peter Tommy Nielsen ◽  
...  
Keyword(s):  
Plasma Spraying ◽  
Raney Nickel ◽  
Atmospheric Plasma Spraying ◽  
Atmospheric Plasma ◽  
Alkaline Water ◽  
Nickel Electrodes

Modelling and control of an alkaline water electrolysis process

2018 ◽  
Vol 1 (2) ◽  
pp. 9-14
Author(s):  
Marisol Cervantes-Bobadilla ◽  
Ricardo Fabricio Escobar Jiménez ◽  
José Francisco Gómez Aguilar ◽  
Tomas Emmanuel Higareda Pliego ◽  
Alberto Armando Alvares Gallegos
Keyword(s):  
Process Model ◽  
Water Electrolysis ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water ◽  
Electrolysis Process ◽  
Linear Dynamic ◽  
Energy Current ◽  
Identification Technique ◽  
Nonlinear Static ◽  
And Control

In this research, an alkaline water electrolysis process is modelled. The electrochemical electrolysis is carried out in an electrolyzer composed of 12 series-connected steel cells with a solution 30% wt of potassium hydroxide. The electrolysis process model was developed using a nonlinear identification technique based on the Hammerstein structure. This structure consists of a nonlinear static block and a linear dynamic block. In this work, the nonlinear static function is modelled by a polynomial approximation equation, and the linear dynamic is modelled using the ARX structure. To control the current feed to the electrolyzer an unconstraint predictive controller was implemented, once the unconstrained MPC was simulated, some restrictions are proposed to design a constrained MPC (CMPC). The CMPC aim is to reduce the electrolyzer's energy consumption (power supply current). Simulation results showed the advantages of using the CMPC since the energy (current) overshoots are avoided.

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