Corrosion Resistance of the CpTi G2 Cellular Lattice with TPMS Architecture for Gas Diffusion Electrodes

The corrosion of materials used in the design of metal-air batteries may shorten their cycle life. Therefore, metal-based materials with enhanced electrochemical stability have attracted much attention. The purpose of this work was to determine the corrosion resistance of commercially pure titanium...

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Bibliographic Details
Published in:Materials 2020-12, Vol.14 (1), p.81
Main Authors: Łosiewicz, Bożena, Maszybrocka, Joanna, Kubisztal, Julian, Skrabalak, Grzegorz, Stwora, Andrzej
Format: Article
Language:English
Subjects:
Additives
Anodic polarization
Carbon
Cellular structure
Corrosion resistance
Corrosion tests
Diffusion electrodes
Efficiency
Electrochemical impedance spectroscopy
Electrode polarization
Electrodes
Electrolytes
Gaseous diffusion
Hydrogen
Laser beam melting
Lattices
Metal air batteries
Metals
Minimal surfaces
Open circuit voltage
Porosity
Porous materials
Statistical analysis
Titanium
Zinc
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Summary:The corrosion of materials used in the design of metal-air batteries may shorten their cycle life. Therefore, metal-based materials with enhanced electrochemical stability have attracted much attention. The purpose of this work was to determine the corrosion resistance of commercially pure titanium Grade 2 (CpTi G2) cellular lattice with the triply periodic minimal surfaces (TPMS) architecture of G80, D80, I-2Y80 in 0.1 M KOH solution saturated with oxygen at 25 °C. To produce CpTi G2 cellular lattices, selective laser melting technology was used which allowed us to obtain 3D cellular lattice structures with a controlled total porosity of 80%. For comparison, the bulk electrode was also investigated. SEM examination and statistical analysis of the surface topography maps of the CpTi G2 cellular lattices with the TPMS architecture revealed much more complex surface morphology compared to the bulk CpTi SLM. Corrosion resistance tests of the obtained materials were conducted using open circuit potential method, Tafel curves, anodic polarization curves, and electrochemical impedance spectroscopy. The highest corrosion resistance and the lowest material consumption per year were revealed for the CpTi G2 cellular lattice with TPMS architecture of G80, which can be proposed as promising material with increased corrosion resistance for gas diffusion in alkaline metal-air batteries.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14010081