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Effects of Lithium Perchlorate on the Electrochemical Performance of PVDF-HFP/CA Composite-Based Solid-State Electrolytes
No full textThis article is index by ScopusComposite-based polymer electrolytes have attracted considerable attention due to their high ionic conductivity and excellent electrochemical performance in energy storage applications. This study explores the influence of Lithium Perchlorate (LiClO4) loading on the electrochemical performance of composite-based solid-state electrolytes (SSEs) based on a composite of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and 20% cellulose acetate (CA), referred to as PVDF-HFP/20%CA. Utilizing a solution casting method, four SSE samples were fabricated: a control (0% LiClO4) and three samples with varying LiClO4 concentrations (5%, 10%, and 15%). Comprehensive characterizations, including scanning electron microscopy (SEM), Fourier-transform infrared (FTIR), physical characterization, and electrochemical impedance spectroscopy (EIS) were conducted to assess the impact of LiClO4 on the composites. The Nyquist plot and DC ionic conductivity analysis further validate the superior performance of PH20CA-15Li (PVDF-HFP/20% cellulose acetate with 15% LiClO4), with ionic conductivity increasing from 1.15 × 10−6 S cm−1 for the control sample to 3.7 × 10−6 S cm−1. Loss Tangent and Cyclic Voltammetry analyses underscore the dynamic electrochemical behavior and stability of PH20CA-15Li, with the voltage window expanding from 0.996 V in the control sample to 1.398 V, highlighting its enhanced dielectric properties and energy storage capabilities. ..see more
Composites of Choline Glycinate-Impregnated ZIF-8 for Enhanced CO2 Capture
No full textThis article is index by ScopusThe increasing concentration of atmospheric CO2 remains a significant driver of climate change, highlighting the need for innovative and sustainable carbon capture technologies. This study investigates the CO2 adsorption performance of composites comprising of choline glycinate ([Chl][Gly])-impregnated on ZIF-8, focusing on low ionic liquid (IL) loadings (4 wt.%, 8 wt.%, and 12 wt.%) optimize adsorption efficiency. The use of the biocompatible and biodegradable [Chl][Gly] aims to balance physisorption and chemisorption mechanisms. Single-component CO2 adsorption isotherms, nitrogen adsorption studies, and scanning electron microscopy (SEM) were employed to characterize the gas interactions within these composites across a wide pressure range. Experimental results demonstrate that the 4 wt.% composite achieved a CO2 uptake of 26.34 mmol/g at 1 bar, exceeding the uptake of pristine ZIF- 8 (23.59 mmol/g) while preserving structural stability. At higher pressures (20 bar), the 12 wt.% composite exhibited a CO2 uptake of 434.91 mmol/g, compared to 367.67 mmol/g for pristine ZIF-8. These results highlight the potential of these composites for efficient CO2 capture and suggest a promising approach for advancing carbon mitigation strategies
