Oxidation-lithiation of nickel, iron and cobalt in contact with molten carbonate

Yazici M. S., Selman J.

SOLID STATE IONICS, vol.124, no.1-2, pp.149-160, 1999 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 124 Issue: 1-2
  • Publication Date: 1999
  • Doi Number: 10.1016/s0167-2738(99)00130-7
  • Journal Name: SOLID STATE IONICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.149-160
  • Keywords: carbonate, oxidation, lithiation, corrosion, ELECTROCHEMICAL-BEHAVIOR, OXIDE
  • Istanbul Technical University Affiliated: Yes

Abstract

The oxidation of nickel, iron and cobalt foils is followed by measuring the open-circuit potential, and is optically monitored. Intense gas evolution, with particle motion, is found to occur throughout the process. A fundamental explanation is given for the three stages of the oxidation-lithiation process of the nickel electrode. A large window of possibilities for the oxidation of iron is observed. The open-circuit potential evolution of cobalt is similar to that of nickel, due to the similarity of oxidation stages. A very high dissolution and/or disintegration rate under CO2 evolution is observed for metallic cobalt samples. A solid-state based mechanism for the oxygen reduction reaction on NiO is proposed. (C) 1999 Elsevier Science B.V. All rights reserved.