A flexible polyelectrolyte-based gel polymer electrolyte for high-performance all-solid-state supercapacitor application

Abstract

A simple polymerization process assisted with UV light for preparing a novel flexible polyelectrolyte-based gel polymer electrolyte (PGPE) is reported. Due to the existence of charged groups in the polyelectrolyte matrix, the PGPE exhibits favorable mechanical strength and excellent ionic conductivity (66.8 mS cm À1 at 25 C). In addition, the all-solid-state supercapacitor fabricated with a PGPE membrane and activated carbon electrodes shows outstanding electrochemical performance. The specific capacitance of the PGPE supercapacitor is 64.92 F g À1 at 1 A g À1 , and the device shows a maximum energy density of 13.26 W h kg À1 and a maximum power density of 2.26 kW kg À1 . After 10 000 cycles at a current density of 2 A g À1 , the all-solid-state supercapacitor with PGPE reveals a capacitance retention of 94.63%. Furthermore, the specific capacitance and charge-discharge behaviors of the flexible PGPE device hardly change with the bending states. Fig. 2 (a) Photograph image of the PGPE with a thickness of about 500 mm. Typical SEM image of (b-d) PGPE matrix with various magnification, (e) interface between the AC electrode and PGPE, and (f) the electrode-PDPA interface. (g) Element mapping image of the surface of the PGPE.This journal is

A study on the preparation of polycation gel polymer electrolyte for supercapacitors

“…6c and d , it is observed that the deformation of the PDPA SC is more significant than that of PGPE SC, suggesting that it cannot maintain high-efficiency ion transmission at the high scan rate. The results are in agreement with the findings of Yan et al , 42 who put forward the charge transport resistance of PDPA SC is enhanced with the increase of the scan rates, so it behaves inferior capacitance characteristic, while the PGPE SC exhibits a typical double-layer capacitance feature. It proves that the addition of the charged groups in PGPE powerfully influences its electrochemical properties.…”

“…Stalgren et al 29 report two similar monomer with charged groups, one is used in the following work to prepare PGPE. Yan et al 42 develop a system of poly(C 3 (Br)DMAEMA- co -PEGMA) for all-solid-state supercapacitors, which exhibits high ionic conductivity of 66.8 mS cm −1 (25 °C) and excellent mechanical strength. When it is fabricated in the supercapacitor, the electrochemical properties of the device are outstanding.…”

Direct surface coating of high voltage LiCoO2 cathode with P(VDF-HFP) based gel polymer electrolyte

“…Ionic conductivity is the most signicant parameter for studying the electrochemical performance of electrolyte membrane. [29][30][31][32][33][34] The bulk resistance (R b ) of the PHL GPE was measured by AC impedance spectrometer, and the conductivity was calculated according to the literature, 35,36 Fig. 2b shows the R b at different temperature from 20 C to 60 C. Obviously, the value of R b becomes smaller with the increasing temperature corresponding to the increasing ionic conductivity.…”

Physical and Charge-Discharge behavior of Facile PVdF-co-HFP Nanocomposite Polymer Electrolyte for Lithium Ion Polymer Batteries

“…Polymer electrolyte has attracted extensive attention which is widely employed in rechargeable lithium ion batteries (RLIBs), super capacitors, and solar cells, etc [1][2][3]. For the few decades, the Li + ion movement is considered and enhanced in conducting performance between anode and cathode by researchers.…”