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Dynamic NMR studies of polymer elect...

Khalfan, Amish N.

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Dynamic NMR studies of polymer electrolyte materials for application to lithium-ion batteries and fuel cells.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Dynamic NMR studies of polymer electrolyte materials for application to lithium-ion batteries and fuel cells./
Author:	Khalfan, Amish N.
Description:	227 p.
Notes:	Adviser: Steven G. Greenbaum.
Contained By:	Dissertation Abstracts International68-10B.
Subject:	Chemistry, Polymer. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3278440
ISBN:	9780549235200

Dynamic NMR studies of polymer electrolyte materials for application to lithium-ion batteries and fuel cells.
Khalfan, Amish N.

Dynamic NMR studies of polymer electrolyte materials for application to lithium-ion batteries and fuel cells. - 227 p.

Adviser: Steven G. Greenbaum.

Thesis (Ph.D.)--City University of New York, 2007.

This dissertation investigates the structural and dynamical properties of polymer electrolyte materials for applications to lithium-ion batteries and fuel cells. The nuclear magnetic resonance (NMR) technique was used to characterize these materials. NMR aids in understanding the local environments of nuclei and the mobility of a molecular/ionic species. Five research projects were carried out, and they have been outlined in this work.

ISBN: 9780549235200Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Dynamic NMR studies of polymer electrolyte materials for application to lithium-ion batteries and fuel cells.
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020 $a 9780549235200
035 $a (UMI)AAI3278440
035 $a AAI3278440
040 $a UMI $c UMI
100 1 $a Khalfan, Amish N. $3 1263798
245 1 0 $a Dynamic NMR studies of polymer electrolyte materials for application to lithium-ion batteries and fuel cells.
300 $a 227 p.
500 $a Adviser: Steven G. Greenbaum.
500 $a Source: Dissertation Abstracts International, Volume: 68-10, Section: B, page: 6719.
502 $a Thesis (Ph.D.)--City University of New York, 2007.
520 $a This dissertation investigates the structural and dynamical properties of polymer electrolyte materials for applications to lithium-ion batteries and fuel cells. The nuclear magnetic resonance (NMR) technique was used to characterize these materials. NMR aids in understanding the local environments of nuclei and the mobility of a molecular/ionic species. Five research projects were carried out, and they have been outlined in this work.
520 $a NASA has developed rod-coil block copolymers for use as electrolytes in lithium-ion batteries. The copolymers exhibit a microphase separation within their structure leading to the formation of ionically conducting channels. We studied ion transport properties of the copolymers, and determined the predominant mechanism for transport to occur in the amorphous phase.
520 $a Seven gel polymer electrolytes, each containing a mixture of LiBETI salt and organic solvents, were studied. Two of them incorporated BMI (1-n-butyl-3-methylimidazolium) ionic liquid. Ionic liquids are room temperature molten salts. BMI had been thought to enhance ion mobility. However, the BMI component was observed to restrict ion mobility.
520 $a Gel polymer electrolytes containing LiTFSI salt and P13TFSI ionic liquid with or without the inclusion of ethylene carbonate (EC) were studied for application to lithium metal/air batteries, which have high theoretical energy densities. The addition of EC was found to improve lithium ion transport. The gels with EC therefore prove to be favorable for use as electrolytes in lithium metal/air batteries.
520 $a Highly sulfonated poly(arylenethioethersulfone) (SPTES) membranes were examined for use in direct methanol fuel cells (DMFCs) as an alternative to the Nafion membrane. DMFCs use methanol as a fuel instead of reformed hydrogen as in conventional proton exchange membrane fuel cells. Compared to Nafion, the SPTES membranes were shown to retain water better at high temperatures and yield lower methanol diffusion.
520 $a SPTES membranes with the addition of fluorine groups (6F-SPTES) were also studied, and these membranes had been thought to show an improvement in water transport properties over SPTES. However, water diffusion studies of the 6F-SPTES membranes revealed the fluorinated membranes to be unfavorable. The morphology of the FSPTES is suspected to be more susceptible to the loss of bound water at higher temperatures than SPTES.
590 $a School code: 0046.
650 4 $a Chemistry, Polymer. $3 1018428
650 4 $a Energy. $3 876794
650 4 $a Physics, Condensed Matter. $3 1018743
690 $a 0495
690 $a 0611
690 $a 0791
710 2 $a City University of New York. $b Physics. $3 1025716
773 0 $t Dissertation Abstracts International $g 68-10B.
790 $a 0046
790 1 0 $a Greenbaum, Steven G., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3278440