000			03348ntm a2200337 i 4500
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003			MY-KuUP
005			20251125110919.0
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008			240822t20242024my a|||fr|||| 000 0 eng d
020			_aTHE0009925 (Local) _qHardback
040			_aUMPSA _beng _cUMP _erda
090			_aFIST .F38 2024 r Thesis
100	1		_aNorfatihah Binti Mazuki, _eauthor.
245	1	0	_aPolymethyl methacrylate – polylactic acid as hybrid gel polymer electrolytes for li+ ions battery application / _cNorfatihah Binti Mazuki
264		1	_aKuantan, Pahang : _bUMPSA, _c2024
264		4	_c© 2024
300			_axiv, 242 pages ; _billustration ; _30 cm. +30 cm. + _e1 CD-ROM
336			_2rdacontent _atext
337			_2rdamedia _aunmediated
338			_2rdacarrier _avolume
347			_2rda _atext file _bPDF
500			_aFaculty of Industrial Sciences and Technology
502			_aThesis (Doctor of Philosophy) -- Universiti Malaysia Pahang – 2024
504			_aIncludes bibliographical references
520	3		_aThe introduction of polymer electrolytes in 1970 revolutionized electrochemical devices by providing a safer alternative to traditional electrolytes, making electrolytes essential components in the field. Thus, this research focuses on developing a novel Hybrid Gel Polymer Electrolyte (HGPE) tailored for lithium-ion batteries, comprising two systems: PMMA-PLA-LiTFSI (System I) and PMMA-PLA-LiTFSI-[EDIMP]TFSI (System II). These systems employ a hybrid polymer host of PMMA and PLA, with LiTFSI as the ionic dopant salt and [EDIMP]TFSI as the ionic liquid. The study investigates the physicochemical, ionic conduction, and electrochemical characteristics of these HGPEs. Fourier Transform Infrared Spectroscopy (FTIR) confirms interactions between PMMAPLA, LiTFSI, and [EDIMP]TFSI, while X-ray Diffraction (XRD) and Differential Scanning Calorimetry (DSC) analyses reveal increased amorphous phase and enhanced flexibility in polymer chains with higher lithium salt and ionic liquid content. Ionic conductivity improves from 1.02 × 10-3 S cm-1 (20 wt.% LiTFSI) to 3.90 × 10-3 S cm-1 with 20 wt.% [EDIMP]TFSI. Temperature-dependent behavior follows an Arrhenius pattern, with lower activation energy inversely correlated to increased conductivity. NonDebye characteristics are observed in the permittivity spectra. Arof-Noor (A-N) method determines ionic mobility, charge carriers, and diffusion coefficient, elucidating factors influencing ionic conductivity variations. The highest-conductivity HGPEs (20 wt.% LiTFSI and 20 wt.% [EDIMP]TFSI) exhibit enhanced lithium transport number (tLi + ) and widened electrochemical stability window (from 4.3V to 5V). Selected HGPE samples are employed in LiǀHGPEsǀGraphite cells, yielding discharge capacities of 152.06 mAh g -1 and 71.15 mAh g-1 for 20 wt.% LiTFSI and 20 wt.% [EDIMP]TFSI electrolytes, respectively, at 3.72 A g-1 . These promising results highlight the potential of the PMMAPLA-based HGPEs for lithium-ion battery applications, with further studies recommended for compatibility investigations between electrode and electrolyte materials.
610	2	0	_aFaculty of Industrial Sciences and Technology _xDissertations
650		0	_aUniversities and colleges _xDissertations
650		0	_aTheses
942			_2lcc _cTHESIS