Electrochemical supercapacitor with polymeric active electrolyte

Abstract

An electrochemical supercapacitor with a polymeric active electrolyte was designed and fabricated in this work. A water-soluble conducting polymer, sulfonated polyaniline (SPAni), was used in the supercapacitor as the active electrolyte and a semipermeable membrane was employed as the separator of the device. It was found that SPAni in the electrolyte can provide pseudocapacitance via its reversible electrochemical redox reaction. Owing to the good stability of SPAni, the supercapacitor has a long cycling life.Moreover, the migration of SPAni between the two electrodes was blocked by the semipermeable membrane separator, thus self-discharge caused by the shuttle effect of SPAni was suppressed. The research in this paper demonstrates the possibility of using a polymer as the active electrolyte in a supercapacitor and has paved a new way to achieve active electrolyte enhanced supercapacitors with high capacitance and good energy retention.

3D Graphene‐Based H2‐Production Photocatalyst and Electrocatalyst

“…Apart from the preparation of 3D graphene through chemical reduction method with the aid of reducing agent, electrochemical reduction of GO in aqueous solution is thought to be a green and effective route to prepare 3D graphene. For example, Chen et al [ 77 ] fabricated 3D porous graphene‐based composite materials through a facile and universal template‐free approach composed of two consecutive electrochemical steps ( Figure 17 a). Highly porous and conductive 3D graphene was directly deposited onto the copper foil surface followed by the successive electrochemical deposition of the targeted filler material, giving rise to a 3D graphene‐based composite architecture.…”

A review of electrolyte materials and compositions for electrochemical supercapacitors

“…As generally realized, the choice of separator materials depends on the type of electrode, working temperature and ES cell voltage. 430,436 Recently, some new separator materials, such as GO films 492 and eggshell membranes, 493 have been explored for ESs. Bittner et al 476 found that the trace amount of water in the organic electrolyte (TEABF 4 /ACN) could play a role in accelerating the ageing process of EDLCs when a cellulose separator was used.…”

A polypropylene/high density polyethylene blend compatibilized with an ethylene‐propylene‐diene monomer block copolymer: Fitting dynamic rheological data by emulsion models with a physical scheme

“…As for the failure prediction for PP‐rich blends, it may be attributed to the asymmetric viscoelasticity between PP and HDPE. In the work of Chen and Wu, the highly asymmetric in their viscoelasticity of the Poly(trimethylene terephthalate)/poly(butylenes succinate) (PTT/PBS) blends affects the description of Palierne's emulsion model. At the same temperature PP has higher elasticity and viscosity than HDPE.…”