- Title
- Investigation on ionic conduction and structural properties of carboxymethyl cellulose doped ammonium sulphate based solid biopolymer electrolytes
- Creator
- Nur Tasnim Husna Yusoff Faculty of Science
- Creator
- Nur Hidayah Ahmad
- Creator
- Universiti Teknologi Malaysia
- Creator
- Faculty of Science
- Subject
- Science
- Date
- 2023 Pub. Date
- Type
- Thesis
- Relation
- Masters
- Description
- The development of solid polymer electrolyte (SPE) in battery applications has been studied as an ionic conductor. However, using SPE gives a few disadvantages like high-cost and non-biodegradability. Therefore, by solving this issue, the SPE material was changed to solid biopolymer electrolyte (SBE) material. In this study, carboxymethyl cellulose (CMC) was chosen for SBE material due to its enhancement in low conductivity and acted as good polymer host. In order to increase the conductivity, the CMC SBE was enhanced by adding ammonium sulphate (AS) as ionic dopant. In this study, the first objective was to prepare CMC-AS SBE using solution-casting technique where the sample namely A0, A5, A10, A15, A20 and A25 representing the composition of AS. Furthermore, the CMC-AS SBEs were characterized for their ionic conduction properties using electrical impedance spectroscopy (EIS). The analysis for ionic conduction properties showed that A10 obtained the highest conductivity and lowest activation energy at room temperature. Dielectric and modulus study exhibited the SBE followed non-Debye behavior. Subsequently, the electrical properties of CMC-AS SBE were measured at different temperatures resulted in temperature dependence and its regression value (R2). The conductivity of CMC-AS SBE was supported by X-ray diffraction (XRD), atomic force microscopy (AFM) and Fourier Transform infrared (FTIR). From XRD analysis, the CMC SBE was confirmed in amorphous and CMC-AS SBEs were in semicrystalline. Moreover, XRD deconvolution was applied and it was obtained that the sample with highest conductivity (A10) has the lowest degree of crystallinity. The AFM analysis revealed the optimum value of surface roughness. Moreover, in this study, the FTIR analysis used two methods; experimental and computational. The wavenumber from FTIR experimental were compared with FTIR computational method. The FTIR analysis also discovered the free and contact ion by applying FTIR deconvolution. This method also used to identify the transport parameter for CMC-AS SBEs. In this study, the conductivity was not affected by the number of mobile ions, but associated with the ionic mobility and diffusion coefficient. Therefore, the conclusion can be made where AS could be one of the potential materials for enhancement in battery applications.
- Description
- Thesis (Master of Philosophy in Physics)) - Universiti Teknologi Malaysia, 2023
- Format
- Unpublished, 117 p., Completion
- Language
- ENG
- Rights
- Closed Access, UTM, Complete
- Identifier
- vital:154714, valet-20231127-081518
- Contributor
- zulraizam
- Site
- Restricted Repository (Click here to Restricted Repository. Then, sign-in to download material. Login required.)
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| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details | ATTACHMENT01 | NurTasnimHusnaYusoffMFS2023.pdf | 1 MB | Adobe Acrobat PDF | View Details |