Relationship between water departure and capacity loss of α and β-PbO2 using an all solid-state system: Estimation of proton diffusion coefficient

Autor:	L. Zerroual, R. Fitas, N. Chelali, B. Djellouli
Rok vydání:	2006
Předmět:	Proton Renewable Energy Sustainability and the Environment Chemistry Diffusion Drop (liquid) Analytical chemistry Energy Engineering and Power Technology Electrolyte Conductivity Electrode Titration Electrical and Electronic Engineering Physical and Theoretical Chemistry Ohmic contact
Zdroj:	Journal of Power Sources. 158:837-840
ISSN:	0378-7753
DOI:	10.1016/j.jpowsour.2005.11.011
Popis:	The proton diffusion coefficient for both fresh and heat-treated (140 and 230 °C, respectively) α and β-PbO 2 electrodes was estimated at room temperature using Galvanostatic Intermittent Titration Technique (GITT). PbO 2 samples were prepared by electroformation of cured plates. HSbO 3 · x H 2 O with a conductivity of 3.29 × 10 −3 Ω −1 cm −1 , was used as solid protonic conductor (SPC) electrolyte. It was found that when structural water is removed, the capacity of both α and β-PbO 2 electrodes decreases and the ohmic drop increases. The departure of structural water affects considerably the value of proton diffusion coefficient.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c908f573d1b3096ac8f8f609a9d51a7e https://doi.org/10.1016/j.jpowsour.2005.11.011 Zobrazit plný text záznamu Full Text from ScienceDirect