Dynamic simulation of the charge-discharge characteristics of the sodium-sulphur cell

Hiroyuki Kawamoto

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A dynamic model of the porous sulphur electrode including diffusion of the reactant is developed to simulate charge-discharge characteristics of the sodium-sulphur cell and transient behaviour of the cell after termination of operation. From the results of investigations the following are clarified: (1) sodium ion concentration on the solid electrolyte side is low during charge, on the other hand, it is high during discharge; (2) an insulating film of sulphur is formed at the surface of the solid electrolyte in the deeply charged stage. This results in an increase of the cell resistance and thus restricts charge acceptance; (3) the resistance in the single phase region is larger than that in the two phase region; and (4) open circuit voltage in the single phase region, observed after termination of operation, is not equal to the equilibrium value but gradually approaches it according to the concentration relaxation. These characteristics agree well with experimental results.

Original languageEnglish
Pages (from-to)409-414
Number of pages6
JournalJournal of Applied Electrochemistry
Volume21
Issue number5
DOIs
Publication statusPublished - 1991 May
Externally publishedYes

ASJC Scopus subject areas

  • Electrochemistry

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