TY  - JOUR
N2  - Composite polymer electrolyte (CPE) based on polyvinyl alcohol (PVA) polymer, potassium carbonate (K2 CO3 ) salt, and silica (SiO2 ) filler was investigated and optimized in this study for improved ionic conductivity and potential window for use in electrochemical devices. Various quan-tities of SiO2 in wt. were incorporated into PVA-K2 CO3 complex to prepare the CPEs. To study the effect of SiO2 on PVA-K2 CO3 composites, the developed electrolytes were characterized for their chemical structure (FTIR), morphology (FESEM), thermal stabilities (TGA), glass transition temperature (differential scanning calorimetry (DSC)), ionic conductivity using electrochemical impedance spectroscopy (EIS), and potential window using linear sweep voltammetry (LSV). Physicochemical characterization results based on thermal and structural analysis indicated that the addition of SiO2 enhanced the amorphous region of the PVA-K2 CO3 composites which enhanced the dissociation of the K2 CO3 salt into K+ and CO32â?? and thus resulting in an increase of the ionic conduction of the electrolyte. An optimum ionic conductivity of 3.25 Ã? 10â??4 and 7.86 Ã? 10â??3 mScmâ??1 at ambient temperature and at 373.15 K, respectively, at a potential window of 3.35 V was observed at a composition of 15 wt. SiO2 . From FESEM micrographs, the white granules and aggregate seen on the surface of the samples confirm that SiO2 particles have been successfully dispersed into the PVA-K2 CO3 matrix. The observed ionic conductivity increased linearly with increase in temperature confirming the electrolyte as temperature-dependent. Based on the observed performance, it can be concluded that the CPEs based on PVA-K2 CO3-SiO2 composites could serve as promising candidate for portable and flexible next generation energy storage devices. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
IS  - 1
KW  - Aggregates; Composite structures; Differential scanning calorimetry; Electrochemical devices; Electrochemical impedance spectroscopy; Energy storage; Filled polymers; Fourier transform infrared spectroscopy; Glass transition; Ionic conductivity; Morphology; Polymer films; Potash; Silica; Silicon; Temperature
KW  -  Amorphous regions; Composite polymer electrolytes; Electrochemical performance; Linear sweep voltammetry; Physico-chemical characterization; Poly (vinyl alcohol) (PVA); Temperature dependent; Thermal and structural analysis
KW  -  Polyelectrolytes
ID  - scholars15948
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098890513&doi=10.3390%2fpolym13010092&partnerID=40&md5=7e9481bf2278530693c09607b10f44b4
JF  - Polymers
A1  - Abdulkadir, B.A.
A1  - Dennis, J.O.
A1  - Al-Hadeethi, Y.
A1  - Shukur, M.F.B.A.
A1  - Mkawi, E.M.
A1  - Al-Harbi, N.
A1  - Ibnaouf, K.H.
A1  - Aldaghri, O.
A1  - Usman, F.
A1  - Abbas Adam, A.
VL  - 13
Y1  - 2021///
N1  - cited By 21
TI  - Optimization of the electrochemical performance of a composite polymer electrolyte based on pva-k2 co3-sio2 composite
SP  - 1
AV  - none
EP  - 24
SN  - 20734360
PB  - MDPI AG
ER  -