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Scanning Electron Microscopy study of Macbat regeneration effect on lead-acid battery electrodes
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics.
2013 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesisAlternative title
Svepelektronmikroskopistudie av effekten från MacBat regenerering på elektroder från bly syra batterier (Swedish)
Abstract [en]

Electrodes from lead-acid batteries were studied using scanning electron microscopy and energy dispersive spectroscopy. This to observe the effects of cycling on the batteries and how a capacity recovery process, known as Macbat regeneration, affected the active material with focus on hard sulphation. First, two new batteries were cycled for two months and electrodes from them were studied when the batteries were new, cycled, fully charged after cycling and regenerated after cycling. Then electrodes from a separate battery that had been used in industry was studied prior to and after Macbat regeneration. On the cycled batteries it was found that after the cycling of the batteries no hard sulphation were present on the electrodes. The study of the separate battery showed that the battery had hard sulphation in its electrodes and that the Macbat regeneration was able to remove hard sulphation both on the surface of the electrodes and also inside the active material.

Abstract [sv]

Elektroder från bly syra batterier studerades med hjälp av svepelektronmikroskopi och energidispersiv spektroskopi. Detta för att observera effekterna av cykling på batterierna och hur en process för kapacitet återhämtning, kännd som Macbat regenerering, påverkade det aktiva materialet med fokus på hård sulfatering. Först blev två nya batterier cyklade i två månader och elektroder från dem studerades när batterierna var nya, cyklade, fulladdade efter cykling och regenererade efter cykling. Sedan studerades elektroder före och efter Macbat regenerering från ett separat batteri som hade använts i industri. På  de cyklade batterierna fann man att efter cyklingen av batterierna fanns ingen hård sulfatering på elektroderna. Studien av det separata batteriet visade att batteriet hade hård sulfatering i elektroderna och att Macbat regenereringen kunde ta bort hård sulfatering både på ytan och även inne det aktiva materialet.

Place, publisher, year, edition, pages
2013.
Keyword [en]
leac-acid, electrodes, SEM, EDS, sulfuric acid, regeneration, Macbat
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:kau:diva-27971Local ID: FY:1OAI: oai:DiVA.org:kau-27971DiVA: diva2:635632
Subject / course
Engineering Physics, Master of Science
Presentation
2013-06-17, 21D302, Universitetsgatan 2, Karlstad, 15:15 (Swedish)
Supervisors
Examiners
Available from: 2013-08-22 Created: 2013-06-16 Last updated: 2013-08-22Bibliographically approved

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