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Nafion blend membranes for the direc...

DeLuca, Nicholas William.

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Nafion blend membranes for the direct methanol fuel cell.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Nafion blend membranes for the direct methanol fuel cell./
作者:	DeLuca, Nicholas William.
面頁冊數:	234 p.
附註:	Adviser: Y. A. Elabd.
Contained By:	Dissertation Abstracts International69-01B.
標題:	Chemistry, Polymer. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3298427
ISBN:	9780549419457

Nafion blend membranes for the direct methanol fuel cell.
DeLuca, Nicholas William.

Nafion blend membranes for the direct methanol fuel cell. - 234 p.

Adviser: Y. A. Elabd.

Thesis (Ph.D.)--Drexel University, 2008.

The direct methanol fuel cell (DMFC) will replace lithium ion batteries in portable electronic devices, where current DMFCs operate at double the power density of current lithium ion batteries with instant recharge (refuel) capability. However, the DMFC could provide much higher power densities if the heart of the fuel cell---the polymer electrolyte membrane (PEM)---were more resistant to the fuel (methanol). Therefore, the development of Nafion RTM (the most commonly used PEM in fuel cells) alternatives that exhibit high proton conductivity and low methanol permeability (high selectivity) is an active area of research. Polymer blends are a simple and cost-effective method to develop membranes that conjoin both of the desired transport properties. To date, there is limited research in the area of PEM blends, and furthermore, a number of unresolved questions.

ISBN: 9780549419457Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Nafion blend membranes for the direct methanol fuel cell.
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245 1 0 $a Nafion blend membranes for the direct methanol fuel cell.
300 $a 234 p.
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500 $a Source: Dissertation Abstracts International, Volume: 69-01, Section: B, page: 0347.
502 $a Thesis (Ph.D.)--Drexel University, 2008.
520 $a The direct methanol fuel cell (DMFC) will replace lithium ion batteries in portable electronic devices, where current DMFCs operate at double the power density of current lithium ion batteries with instant recharge (refuel) capability. However, the DMFC could provide much higher power densities if the heart of the fuel cell---the polymer electrolyte membrane (PEM)---were more resistant to the fuel (methanol). Therefore, the development of Nafion RTM (the most commonly used PEM in fuel cells) alternatives that exhibit high proton conductivity and low methanol permeability (high selectivity) is an active area of research. Polymer blends are a simple and cost-effective method to develop membranes that conjoin both of the desired transport properties. To date, there is limited research in the area of PEM blends, and furthermore, a number of unresolved questions.
520 $a In this study, the effects of blend composition, chemistry, and processing on polymer morphology and subsequently the transport properties and selectivity were investigated. A key result in this study was comparing solution cast membranes to heat pressed membranes. Both heat pressed membranes and unannealed solution cast membranes resulted in immiscible blends with low selectivity, while annealed solution cast membranes improved miscibility and subsequently selectivity. These results were confirmed, where the DMFC performance of an annealed solution cast blend membrane of NafionRTM/poly(vinyl alcohol) (PVA) (with only 5 wt% PVA) was 33% higher than NafionRTM (the commercial standard) at a high methanol fuel concentration (8 M).
590 $a School code: 0065.
650 4 $a Chemistry, Polymer. $3 1018428
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