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Tailoring Polybenzimidazole Membrane...

Pingitore, Andrew T.

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Tailoring Polybenzimidazole Membranes for Enhanced Performance in Electrochemical Devices.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Tailoring Polybenzimidazole Membranes for Enhanced Performance in Electrochemical Devices./
作者:	Pingitore, Andrew T.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	156 p.
附註:	Source: Dissertations Abstracts International, Volume: 80-08, Section: B.
Contained By:	Dissertations Abstracts International80-08B.
標題:	Organic chemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10973069
ISBN:	9780438875340

Tailoring Polybenzimidazole Membranes for Enhanced Performance in Electrochemical Devices.
Pingitore, Andrew T.

Tailoring Polybenzimidazole Membranes for Enhanced Performance in Electrochemical Devices. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 156 p.

Source: Dissertations Abstracts International, Volume: 80-08, Section: B.

Thesis (Ph.D.)--University of South Carolina, 2018.

This item must not be sold to any third party vendors.

After approximately 15 years of development, polybenzimidazole (PBI) chemistries and the concomitant manufacturing processes have evolved into commercially produced membrane electrode assemblies (MEAs). PBI MEAs can operate reliably without complex water humidification hardware and are able to run at elevated temperatures of 120-180 OC due to the physical and chemical robustness of PBI membranes. These higher temperatures improve the electrode kinetics and conductivity of the MEAs, simplify the water and thermal management of the systems, and significantly increase their tolerance to fuel impurities. Membranes cast by a newly developed polyphosphoric acid (PPA) Process possessed excellent mechanical properties, higher phosphoric acid (PA)/PBI ratios, and enhanced proton conductivities as compared to previous methods of membrane preparation. p-PBI and m-PBI are the most common polymers in PBI-based fuel cell systems, although AB-PBI and other derivatives have been investigated. The work presented in this dissertation demonstrates the chemical flexibility of PBI polymers which enables the tailoring of specific membrane properties enhancing performance in new and different electrochemical devices with diverse operating conditions.

ISBN: 9780438875340Subjects--Topical Terms:

523952
Organic chemistry.

Tailoring Polybenzimidazole Membranes for Enhanced Performance in Electrochemical Devices.
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520 $a After approximately 15 years of development, polybenzimidazole (PBI) chemistries and the concomitant manufacturing processes have evolved into commercially produced membrane electrode assemblies (MEAs). PBI MEAs can operate reliably without complex water humidification hardware and are able to run at elevated temperatures of 120-180 OC due to the physical and chemical robustness of PBI membranes. These higher temperatures improve the electrode kinetics and conductivity of the MEAs, simplify the water and thermal management of the systems, and significantly increase their tolerance to fuel impurities. Membranes cast by a newly developed polyphosphoric acid (PPA) Process possessed excellent mechanical properties, higher phosphoric acid (PA)/PBI ratios, and enhanced proton conductivities as compared to previous methods of membrane preparation. p-PBI and m-PBI are the most common polymers in PBI-based fuel cell systems, although AB-PBI and other derivatives have been investigated. The work presented in this dissertation demonstrates the chemical flexibility of PBI polymers which enables the tailoring of specific membrane properties enhancing performance in new and different electrochemical devices with diverse operating conditions.
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