Promoting Electrochemical Reversibility: Concave versus Convex Electrodes
Haotian Chen, Huanxin Li, Bedřich Smetana, Vlastimil Novák, Richard G. Compton
TL;DR
This paper explores how the shape of electrodes affects electrochemical reversibility, showing that concave shapes can reduce overpotential and improve performance in sensors and batteries.
Contribution
The novel contribution is the macroscopic simulation showing that concave electrode shapes reduce overpotential compared to flat or convex shapes.
Findings
Concave electrode surfaces exhibit reduced overpotential compared to flat or convex surfaces.
Electrode shape is a key factor in controlling electrochemical reversibility at the macroscopic scale.
Concave designs offer a new approach for enhancing electrocatalytic responses in sensors and battery materials.
Abstract
The importance of electrode shape, alongside electrode size, as key factors in controlling the reversibility or otherwise of electrochemical responses, is recognized at the microscopic level but is explored here via finite-element simulation on the macroscopic scale. Reduced overpotential is seen for concave surfaces relative to flat or convex surfaces, providing an unexplored avenue for the design and fabrication of electrodes, including composites for diverse applications where enhanced reversibility is desirable, such as in sensors and battery materials where the promotion of electrocatalytic responses is important.
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Taxonomy
TopicsElectrocatalysts for Energy Conversion · Advanced battery technologies research · Conducting polymers and applications