Impedance Spectroscopy as a Novel Approach to Probe the Phase Transition and Microstructures Existing in CS:PEO Based Blend Electrolytes

Abstract

In this work the role of phase transition of PEO from crystalline to amorphous phases on DC conductivity enhancement in chitosan-based polymer electrolyte was discussed. Silver ion-conducting polymer electrolytes based on chitosan (CS) incorporated with silver nitrate (AgNt) is prepared via solution cast technique. Various amounts of polyethylene oxide (PEO) are added to the CS:AgNt system to prepare blend polymer electrolytes. Ultraviolet-visible (UV-vis) spectrophotometry is used to confirm that the blended samples containing AgNt salt exhibit a broad absorption peak. From optical micrograph images it is apparent that small white specs appear on the surface of the samples. The SEM results clearly show the aggregated silver nanoparticles. The enlargement of the crystalline area was observed from the morphological emergence and impedance plots. The phase separation in SEM images was observed at high PEO concentration. The XRD consequences support the morphological manifestation. In this study a new approach is offered to explore the microstructures existing in the blend electrolytes. The width of the semicircle linked to crystalline phase in impedance spectra was found to be increased with the increase of PEO concentration. A slow increase of DC conductivity was observed at low temperatures while above 333 K an immediate change in DC conductivity was obtained. The rapid rise of DC conductivity at high temperatures is correlated with the DSC results and impedance studies at high temperatures.

Properties enhancement of carboxymethyl cellulose with thermo-responsive polymer as solid polymer electrolyte for zinc ion battery

“…Recently, the use of biopolymer materials has raised special attention as they are abundant in nature and are eco-friendlier. Several polymers have been found to be suitable as a polymer host, including chitosan 16 , 17 , cellulose 2 , 18 , 19 , agarose 20 , and carboxymethyl cellulose (CMC) 21 – 26 . Of these, CMC shows a good potential to act as a polymer host for proton-conducting biopolymer electrolytes.…”

“…The enhancement of polymer properties through polymer blending or copolymers 13 , 16 , 17 , 23 – 25 , 28 , plasticization 22 , 29 and composite formation 3 , 12 have been competitively considered in the research community. The polymer blend technique was applied in the present study due to its low cost and easy processing as well as its ability to provide promising conductivity values.…”

“…The polymer blend technique was applied in the present study due to its low cost and easy processing as well as its ability to provide promising conductivity values. Moreover, this method is robust, and the desired properties can be tailored 16 , 17 , 23 – 25 , 28 .…”

Characterization of Electrodes Membrane PVA-Enzyme Coating PVC-KTPCLPBas Urea Sensors With SEM-EDX, XRDand UV-Vis

“…For the manufacture of membranes and membrane electrodes, 1.0 mg of enzyme was used in 0.0350 g of PVA. According to (Aziz et al, 2018) that the mixed samples showed the highest peak absorbance peak, the absorbance was analyzed by UV-Vis in the range of 180-1000 nm.…”

Analisis Termodinamika Molekul Magnesium Sulphate (MgSO4)

“…Besarnya konduktivitas ini ditentukan oleh jumlah konsentrasi elektrolit. Energi listrik dapat ditransfer melalui materi berupa hantaran yang bermuatan listrik yang berwujud arus listrik yang berarti bahwa harus ada pembawa muatan listrik di dalam materi serta adanya gaya yang menggerakkan pembawa muatan tersebut (227)(228)(229)(230)(231) . Pembawa muatan dapat berupa elektron atau dapat juga digunakan ion positif dan ion negatif dalam larutan elektrolit dan leburan garam (232) .…”