Vacuum plasma spraying of high-performance electrodes for alkaline water electrolysis

1995 ◽  
Vol 4 (2) ◽  
pp. 185-194 ◽  
Author(s):  
G. Schiller ◽  
R. Henne ◽  
V. Borck
Keyword(s):  
Plasma Spraying ◽  
High Performance ◽  
Water Electrolysis ◽  
Alkaline Water Electrolysis ◽  
Vacuum Plasma Spraying ◽  
Alkaline Water ◽  
Vacuum Plasma

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.

High-performance alkaline water electrolysis using Aemion™ anion exchange membranes

2020 ◽  
Vol 451 ◽  
pp. 227814 ◽  
Author(s):  
Patrick Fortin ◽  
Thulile Khoza ◽  
Xinzhi Cao ◽  
Stig Yngve Martinsen ◽  
Alejandro Oyarce Barnett ◽  
...  
Keyword(s):  
Anion Exchange ◽  
High Performance ◽  
Water Electrolysis ◽  
Anion Exchange Membranes ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water

Pulse Electrodeposited CoFeNiP as Highly Active and Stable Electrocatalyst for Alkaline Water Electrolysis

2021 ◽  
Author(s):  
Yun Li ◽  
Ruopeng Li ◽  
Dan Wang ◽  
Hao Xu ◽  
Xiangyu Lu ◽  
...  
Keyword(s):  
High Performance ◽  
Water Electrolysis ◽  
Cost Effective ◽  
Hydrogen Energy ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water ◽  
Efficient Conversion ◽  
Highly Active ◽  
And Storage

Developing high-performance and cost-effective electrocatalysts for water electrolysis would make a great process for efficient conversion and storage of sustainable hydrogen energy. As a potential electrocatalyst, the improvement of water...

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.

scholarly journals Boosting alkaline water electrolysis by asymmetric temperature modulation

2021 ◽  
Vol 119 (1) ◽  
pp. 013901
Author(s):  
Qinpeng Zhu ◽  
Peihua Yang ◽  
Tao Zhang ◽  
Zehua Yu ◽  
Kang Liu ◽  
...  
Keyword(s):  
Water Electrolysis ◽  
Temperature Modulation ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water

scholarly journals Towards the Hydrogen Economy—A Review of the Parameters That Influence the Efficiency of Alkaline Water Electrolyzers

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3193
Author(s):  
Ana L. Santos ◽  
Maria-João Cebola ◽  
Diogo M. F. Santos
Keyword(s):  
Energy Content ◽  
Water Electrolysis ◽  
High Energy ◽  
Operating Conditions ◽  
Energy Sources ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water ◽  
New Energy ◽  
Recent Developments ◽  
Cell Components

Environmental issues make the quest for better and cleaner energy sources a priority. Worldwide, researchers and companies are continuously working on this matter, taking one of two approaches: either finding new energy sources or improving the efficiency of existing ones. Hydrogen is a well-known energy carrier due to its high energy content, but a somewhat elusive one for being a gas with low molecular weight. This review examines the current electrolysis processes for obtaining hydrogen, with an emphasis on alkaline water electrolysis. This process is far from being new, but research shows that there is still plenty of room for improvement. The efficiency of an electrolyzer mainly relates to the overpotential and resistances in the cell. This work shows that the path to better electrolyzer efficiency is through the optimization of the cell components and operating conditions. Following a brief introduction to the thermodynamics and kinetics of water electrolysis, the most recent developments on several parameters (e.g., electrocatalysts, electrolyte composition, separator, interelectrode distance) are highlighted.

Sign in / Sign up

Export Citation Format

Share Document