Publications by authors named "V Shutthanandan"
Article Synopsis
- - Nonstoichiometric lead oxides are crucial for the performance and lifespan of lead-acid batteries, as they enhance the positive electrode's effectiveness and adhesion properties.
- - Research identified at least two intermediate phases of lead oxide through various analysis techniques, confirming their structural changes and oxidation states during battery cycling.
- - Using advanced computational methods, the stability of these lead oxide phases was examined, offering insights into their formation and variations seen in past studies.
This study presents a novel synthesis of self-standing MoP and MoN heterostructured electrocatalysts with enhanced stability and catalytic performance. Facilitated by the controlled phase and interfacial microstructure, the seamless structures of these catalysts minimize internal resistivity and prevent local corrosion, contributing to increased stability. The chemical synthesis proceeds with an etching step to activate the surface, followed by phosphor-nitriding in a chemical vapor deposition chamber to produce MoP-MoN@Mo heterostructured electrocatalysts.
View Article and Find Full Text PDFThe projection of developing sustainable and cost-efficient electrocatalysts for hydrogen production is booming. However, the full potential of electrocatalysts fabricated from earth-abundant metals has yet to be exploited to replace Pt-group metals due to inadequate efficiency and insufficient design strategies to meet the ever-increasing demands for renewable energies. To improve the electrocatalytic performance, the primary challenge is to optimize the structure and electronic properties by enhancing the intrinsic catalytic activity and expanding the active catalytic surface area.
View Article and Find Full Text PDFCoordination-Dependent Chemical Reactivity of TFSI Anions at a Mg Metal Interface.
ACS Appl Mater Interfaces
February 2023
Article Synopsis
- Charge transfer at the electrode-electrolyte interface involves complex interactions of solvated species, but a clear understanding of their behavior is crucial for improving energy-efficient solid-electrolyte interphase layers.
- Researchers used a controlled technique called ion soft landing to create defined interfaces with specific ions, allowing for detailed study of how these species react on a magnesium surface relevant to multivalent magnesium batteries.
- The study found that undercoordinated solvated species showed higher reactivity compared to fully coordinated ones, which contributes to a better understanding of electrolyte decomposition processes and can drive the design of better sustainable electrochemical technologies.
The enhanced safety, superior energy, and power density of rechargeable metal-air batteries make them ideal energy storage systems for application in energy grids and electric vehicles. However, the absence of a cost-effective and stable bifunctional catalyst that can replace expensive platinum (Pt)-based catalyst to promote oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) at the air cathode hinders their broader adaptation. Here, it is demonstrated that Tin (Sn) doped β-gallium oxide (β-Ga O ) in the bulk form can efficiently catalyze ORR and OER and, hence, be applied as the cathode in Zn-air batteries.
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