Blending and Characteristics of Electrochemical Double-Layer Capacitor Device Assembled from Plasticized Proton Ion Conducting Chitosan:Dextran:NH4PF6 Polymer Electrolytes

Abstract

This research paper investigates the electrochemical performance of chitosan (CS): dextran (DX) polymer-blend electrolytes (PBEs), which have been developed successfully with the incorporation of ammonium hexafluorophosphate (NH4PF6). X-ray diffraction (XRD) analysis indicates that the plasticized electrolyte system with the highest value of direct current (DC) ionic conductivity is the most amorphous system. The glycerol addition increased the amorphous phase and improved the ionic dissociation, which contributed to the enhancement of the fabricated device’s performance. Transference number analysis (TNM) has shown that the charge transport process is mainly by ions rather than electrons, as tion = 0.957. The CS:DX:NH4PF6 system was found to decompose as the voltage goes beyond 1.5 V. Linear sweep voltammetry (LSV) revealed that the potential window for the most plasticized system is 1.5 V. The fabricated electrochemical double-layer capacitor (EDLC) was analyzed with cyclic voltammetry (CV) and charge-discharge analysis. The results from CV verify that the EDLC in this work holds the characteristics of a capacitor. The imperative parameters of the fabricated EDLC such as specific capacitance and internal resistance were found to be 102.9 F/g and 30 Ω, respectively. The energy stored and power delivered by the EDLC were 11.6 Wh/kg and 2741.2 W/kg, respectively.

Plasticized Sodium-Ion Conducting PVA Based Polymer Electrolyte for Electrochemical Energy Storage—EEC Modeling, Transport Properties, and Charge-Discharge Characteristics

“…As expected, the capacitance value is 169 F/g at the 1st cycle. This value is relatively large compared to that recorded for other PVA-based electrolytes incorporated with ammonium salts [ 21 , 37 , 50 ]. After the 1st cycle an enormous lessening of C spe was detected.…”

“…The relatively maximum conductivity value obtained for the PVNA4 electrolyte sample indicates the electrolyte’s eligibility for ion-conducting devices. This is because the conductivity of polymer electrolyte plays the key role in the overall performance of the electrochemical devices [ 50 ]. A good conductivity range must lie between 10 −3 to 10 −5 S cm [ 50 ].…”

“…This is because the conductivity of polymer electrolyte plays the key role in the overall performance of the electrochemical devices [ 50 ]. A good conductivity range must lie between 10 −3 to 10 −5 S cm [ 50 ].…”

The Study of Plasticized Sodium Ion Conducting Polymer Blend Electrolyte Membranes Based on Chitosan/Dextran Biopolymers: Ion Transport, Structural, Morphological and Potential Stability

“…According to Marf et al [ 46 ], the ionic conductivity of the electrolytes depends on the flexibility of the polymer chain and also the mobility of ions, and the use of glycerol as a plasticizer for the system would ease these factors. The highest conductivity value obtained by the B3 electrolyte would be appropriate for the ion-conducting device applications, which necessitate an electrolyte with conductivity series from 10 −3 to 10 −5 S/cm [ 47 ].…”

Investigation of Ion Transport Parameters and Electrochemical Performance of Plasticized Biocompatible Chitosan-Based Proton Conducting Polymer Composite Electrolytes

“…Beyond the 50th cycle, the E d values are almost constant until 400th cycle, with an average of ~2 Wh/kg (see Figure 13 c). At this point, ions subject the same energy barrier as it transports from the polymer electrolyte to the surface of the electrodes [ 112 , 113 , 114 ]. The ion accumulation at the electrode/electrolyte interfaces has a significant effect on the amount of energy storage in EDLC.…”