Design of solid electrolytes for use with dissimilar gas electrodes

Mukhopadhyay, Sukanya ; Jacob, K. T. (1995) Design of solid electrolytes for use with dissimilar gas electrodes Journal of Electroanalytical Chemistry, 395 (1-2). pp. 107-115. ISSN 0022-0728

Full text not available from this repository.

Official URL:

Related URL:


The design of a solid electrolyte that permits the use of dissimilar gas electrodes in an electrochemical cell is presented. It consists of a functionally gradient material with spatial variation in composition. The activity of the conducting ion is fixed at each electrode using different gas species. The system chosen for demonstrating the concept consists of a solid solution between K2CO3 and K2SO4. The composition of the solid solution varies from pure K2CO3 in contact with a CO2 + O2 gas mixture at one electrode to pure K2SO4 exposed to a mixture of SO3 + SO2 + O2 at the other. Two types of composition profiles are studied, one with monotonic variation in composition and the other with extrema. The e.m.f. of the cells is studied as a function of temperature and composition of the gas mixture at each electrode. The results indicate that the e.m.f. is determined primarily by the difference in the chemical potential of potassium at the two electrodes. The diffusion potential caused by ionic concentration gradients in the electrolyte appears to be negligible when the corresponding ionic transport numbers are insignificant. Studies on the response characteristics of the cell based on the gradient electrolyte indicate that the nature of the variation in composition of the electrolyte has only a minor effect on the time evolution of e.m.f. The gradient solid electrolytes have potential application in multielement galvanic sensors at high temperatures.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Solid Electrolytes; Gas Electrodes
ID Code:94956
Deposited On:10 Oct 2012 07:14
Last Modified:10 Oct 2012 07:14

Repository Staff Only: item control page