Perspectives on Degradation in Solid Oxide Fuel Cells Using X-ray Spectroscopies and Scattering

Lai, Samson Yuxiu

Title:

Perspectives on Degradation in Solid Oxide Fuel Cells Using X-ray Spectroscopies and Scattering

dc.contributor.advisor	Alamgir, Faisal M.
dc.contributor.advisor	Liu, Meilin
dc.contributor.author	Lai, Samson Yuxiu
dc.contributor.department	Materials Science and Engineering
dc.date.accessioned	2017-01-11T14:00:42Z
dc.date.available	2017-01-11T14:00:42Z
dc.date.created	2015-12
dc.date.issued	2015-11-16
dc.date.submitted	December 2015
dc.date.updated	2017-01-11T14:00:42Z
dc.description.abstract	Solid oxide fuel cells (SOFCs) represent a major piece of a next-generation, renewable, clean energy economy and contribute to combating anthropogenic climate change by efficiently converting chemical energy into electrical energy through electrochemical reactions. However, despite adding significant chemical, mechanical, and microstructural complexity to push SOFC performance ever higher, cost and durability remain significant barriers to SOFC commercialization. Two of these issues are cathode stability in atmospheres containing carbon dioxide and water vapor and anode stability in fuel containing hydrogen sulfide. With regards to those aspects, state-of-the-art SOFC cathodes (La1-xSrxMnO3-δ and La1-xSrxCo1-yFeyO3-δ) and anodes (NiO and BaZr0.1Ce0.7Y0.1Yb0.1O3-δ) are studied to understand the interactions between contaminant and electrode. In this work, powerful in situ and operando x-ray spectroscopy and scattering experiments provide deep insight into the physiochemical phenomena that define the behavior of SOFC electrode materials. These studies demonstrate that proper combination of in situ and operando experiments, due partially to the powerful intensity and capabilities of synchrotron x-rays, can provide unique information that has never before been possible and is critical to gaining new perspectives and to better understand data where a single perspective may only lead to ambiguous conclusions. Such a multi-pronged characterization approach is vital to gaining a better understanding of complex SOFC materials and providing critical insights for rational design of next-generation SOFC electrode materials.
dc.description.degree	Ph.D.
dc.format.mimetype	application/pdf
dc.identifier.uri	http://hdl.handle.net/1853/56217
dc.language.iso	en_US
dc.publisher	Georgia Institute of Technology
dc.subject	x-ray spectroscopy, solid oxide fuel cells
dc.title	Perspectives on Degradation in Solid Oxide Fuel Cells Using X-ray Spectroscopies and Scattering
dc.type	Text
dc.type.genre	Dissertation
dspace.entity.type	Publication
local.contributor.advisor	Alamgir, Faisal M.
local.contributor.advisor	Liu, Meilin
local.contributor.corporatename	School of Materials Science and Engineering
local.contributor.corporatename	College of Engineering
relation.isAdvisorOfPublication	22d172e2-aca1-4daf-8f04-5840535622ac
relation.isAdvisorOfPublication	30dd1bbc-edf1-406a-9183-d985863cbab3
relation.isOrgUnitOfPublication	21b5a45b-0b8a-4b69-a36b-6556f8426a35
relation.isOrgUnitOfPublication	7c022d60-21d5-497c-b552-95e489a06569
thesis.degree.level	Doctoral