Evaluation of the State of Charge of Battery Electrodes with AC impedance Techniques

Abstract

The main objective of this project was to study the correlations between the state of charge (SOC) of battery electrodes and the frequency dispersion of their impedance. Zinc and silver electrodes were investigated in smooth and porous configurations, under conditions similar to conventional battery applications. The emphasis was on the evolution of random morphologies of a composite dielectric as function of the SOC and the ability of impedance measurements to quantify these changes. We seek theoretical and experimental tools that will help quantify the random morphologies and correlate them with the interfacial chemistry and wish to determine whether phase transitions in transport properties take place during the charge/discharge cycles and how best they can be categorized to provide predictive power for the transport properties in these systems. (jg)

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Document Details

Document Type
Technical Report
Publication Date
Jul 30, 1989
Accession Number
ADA219561

Entities

People

  • Micha Tomkiewicz

Organizations

  • Brooklyn College

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Chemistry
  • Composite Materials
  • Computer Simulations
  • Computers
  • Electrochemical Cells
  • Electrodeposition
  • Electrodes
  • Electrolytes
  • Films
  • Image Processing
  • Impedance
  • Materials
  • Phase Transformations
  • Simulations
  • Students
  • Transport Properties
  • Two Dimensional

Readers

  • Computational Modeling and Simulation
  • Electrical Engineering
  • Reinforced Composite Materials