The dynamical characteristics and the structure of lithium in Nafion were investigated by solid state magic angel spinning nuclear magnetic resonance(MAS NMR).
Variable temperature, longitudinal NMR relaxation time(T1), self-diffusion coefficients and rotational activation energy of various concentrations were determined.
The distribution of the 7Li MAS NMR spectra of Nafion/Li represent the pore size, and T1 of Nafion/Li is slower than the bulk lithium solution, it implied the lithium were crowed in the pore(exchanged with the proton).
Rotational activation energy illustrated the block level of lithium in different pores of Nafion. In the longitudinal NMR relaxation rate of various concentrations, instead, the type of bonding between lithium and water were different. The variable temperature experiments of 7Li MAS NMR spectra also illustrated the temperature about 60~66¢J result in the change of microstructure of Nafion.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0719110-230440 |
| Date | 19 July 2010 |
| Creators | Chia, Jie-Lun |
| Contributors | Jyh-Tsung Lee, Shangwu Ding, Hsiu-Wei Chen |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0719110-230440 |
| Rights | unrestricted, Copyright information available at source archive |
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