Guiding the design of metal batteries

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The Nernst equation plays a vital role in the progress of electrochemical devices like batteries. But it is only used when there is no power. At present, no theory is able to quantitatively anticipate the vital superconducting transition temperature of an electrode-electrolyte interface.

Schematic diagram of a dual-chamber electrochemical cell. Image credit: Singapore University of Technology and Design.

With the help of a conductive Nernst equation, it is possible to solve this difficulty and this would convert the technology which has been powered by superconductive and complicated gadgets and conductive batteries.

Also, it can be used to calculate charge transport as a function of electrolyte or electrode concentrations, redox potentials, and temperature quantitatively. This will help anticipate new physics and technology conversion.

A research group at the Singapore University of Technology and Design (SUTD) has developed the first principles-based charge transport equations for current electrode-electrolyte modeling to advance knowledge of the transport process electrode-electrolyte and solve the zero current problem.

This could lead to new knowledge and breakthroughs in the science of the electrode-electrolyte interface and the fabrication of high-performance electrolytes for biomedical, energy and environmental applications, as well as the prediction of the interfacial superconducting transition.

The research group created an equation for electronic conductivity and electronic entropy of the electrodes to account for the additional surge and resistive loss resulting from current flow. This study was inspired by the success of their previous studies on magnetowetting, entropic electrowetting and thermodynamic entropy.

At the same time, by relating the electronic electrochemical potentials of the electrolyte and the electrode, this equation considers the change in electrolyte chemistry at the electrode-electrolyte interfaces due to current flow.

The real power of electrochemistry was unleashed with this conductive Nernst equation, which quantified the charge transport of electronic devices based on the mechanical, electrical, magnetic and chemical charges introduced.

Wu Ping, Study Principal Investigator and Associate Professor, Singapore University of Technology and Design

Ping added:This conductive Nernst equation, for example, is used to design and control the degradation rates of human implants, as well as to study superconducting batteries for fast charge and discharge performance, and to explore the influence of global warming on colonies of marine organisms..”

The group believes that the Nernst conductive equation will pave the way for exciting discoveries and breakthroughs in interface science. This offers exciting opportunities in the field of biochemistry, environmental chemistry and electrochemistry.

Journal reference:

Wu, P. & Senevirathna, HL (2022) A charge transport prediction method for the metal electrode-aqueous electrolyte interface to guide metal battery design. Acta electrochemistry. doi.org/10.1016/j.electacta.2022.140051

Source: https://www.sutd.edu.sg/

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