Electrochemical double layer capacitor performance of electrospun polymer fiber-electrolyte membrane fabricated by solvent-assisted and thermally induced compression molding processes

PAMPS/MMT composite hydrogel electrolyte for solid-state supercapacitors

“…After that, the slurry was taken out and coated on the porous nickel sheets uniformly which used as current collectors, leave the sheets in vacuum drying oven in 70 for 24h to get the final activated carbon electrodes. PAMPS/MMT composite hydrogel simultaneously served as separator and electrolyte, and was sandwiched between two symmetrical self-made activated carbon electrodes, the composite electrolyte used 6 must be soaked in 4mol/L KOH solution till its weight keeps unchanged, which means KOH solution entrapped in polyelectrolyte is saturated, the swelling capacity (W KOH / g g -1 ) is 8wt% and calculated according to the equation:…”

“…Gel-polymer electrolytes (GPEs) always exhibit high conductivity than that of dry solid-polymer electrolytes. Various polymers [4][5][6][7][8] , such as poly(ethylene oxide) (PEO), poly(vinyl alcohol) (PVA), poly(acrylonitrile), Poly(ethylene glycol) (PEG), poly(vinylidene fluoride) (PVDF) and so on, have been reported to form GPEs with conductivities ranging between 10 -4 and 10 -3 S cm -1 under ambient conditions. GPEs have high swell capacity of ionic or salt solutions to improve their ionic conductivities, and also have good mechanical properties such as flexibility and stretchability.…”

Electrode–Electrolyte Interfacial Processes in Ionic Liquids and Sensor Applications

“…However, in some high capacitance systems and high Faradaic current systems, such as supercapacitor and fuel cell, IR-drop is significant. Although many commercial electrochemical instruments have the capability to compensate IR-drop, it still has to be considered in some analysis of an electrochemical process [100,101]. …”

“…On one hand, the usage of ILs can eliminate the effect of water, and on the other hand, the signal from IL functional group can complicate the interpretation of Fourier transform infrared spectroscopy (FTIR) results. For example, hydrogen bonding is barely present in highly hydrophobic ILs, and as a result, the relative band shifts caused by the hydrogen bonding are negligible when analyzing the IR results in ILs [100,[109][110][111]. For those high purity IL systems, the IR spectra could be considered as the sum of the spectra of anion and cation and other species.…”

A Newly Designed Composite Gel Polymer Electrolyte Based on Poly(Vinylidene Fluoride‐Hexafluoropropylene) (PVDF‐HFP) for Enhanced Solid‐State Lithium‐Sulfur Batteries

“…Meanwhile, the GPE can not only effectively suppress the growth of Li dendrites and avoid short-circuit of batteries, [21,22] but can also suppress the shuttle effect of polysulfides. [23] Polymers like poly(vinylidene fluoride) (PVDF), [24,25] poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP), [26] polyacrylonitrile (PAN), [27] polyethylene (PEO), [28] poly(methyl methacrylate) (PMMA), [29] poly acrylate-basedp olymer, [23] etc.,h ave been adopted to prepare GPEs with high ionic conductivities at room temperature. As one of these candidates, PVDF-HFP is popularly used as the host for GPEs because of its high dielectric constant and high ionic conductivity at room temperature arising from low crystallinity and some functional groups with strong electron withdrawing effect.…”