Multifaceted Analysis of Electrolyte Properties for Batteries

Abstract

The role of electrolyte is very important in improving the performance of batteries, such as higher energy density and higher power. This comprehensive paper summarizes two main topics: research on the redox resistance of electrolyte solutions, which is essential for high energy density, and research on improving the reaction rate of active materials, which is essential for high power. With regard to the redox resistance, the concentration effect and local pH in the vicinity of the electrode were focused on. As for the improvement of the active material reaction rate, a novel method for analyzing the current-potential curve using the concept of electrocatalytic reaction was proposed. The availability of the conductometric titration for analyzing complexes in the electrolyte was also presented. These fundamental studies, based on electrochemical theory and methods from a thermodynamic and kinetic point of view, are important for the design of battery electrolytes and for the interpretation of the phenomena.