Ultrathin PEDOT:PSS/rGO Aerogel Providing Tape‐Like Self‐Healable Electrode for Sensing Space Electric Field with Electrochemical Mechanism

Abstract

A versatile composite aerogel is developed by introducing of PEDOT:PSS in reduced graphene oxide, resulting in an ultrathin aerogel film around 100 µm thick. Like a tape, the aerogel can tightly attach to smooth or rough substrate, and there forms a self‐healable and anti‐vibration energy storage electrode. With a Ti foil substrate, the electrode offers an electrochemical capacity of 190 mF cm−2 at 0.1 mA cm−2 working current density. It also exhibits 98.7% capacitance retention after 10 000 charge/discharge cycles, with almost negligible capacitance decline even after eight damaging/healing cycles or 4000 vibrating cycles. With symmetrical aerogel‐based electrodes, a smart electrochemical device is explored as a sensor for sensitively detecting space electric field strength, ranging from 1100 to 19 000 V m−1. Simulation results verify that the response current in the sensor comes from the internal recombination current in the electrochemical device, which originates from ion recombination near the electrode substrate in space electric field. Further, a validation sensor experiment is designed and realized with affiliated modules, successfully monitoring space electric field.

Efficient Two-Dimensional Perovskite Solar Cells Realized by Incorporation of Ti3C2Tx MXene as Nano-Dopants

“…Here, R s represents the series resistance, which primarily reflects the electrical contacts, wires, and sheet resistance of the electrodes [ 53 ]. The charge-transfer properties at the interface are reflected by the charge-transfer resistance ( R tr ), whereas R rec is related to the recombination of the carriers [ 54 ]. It is clear that the R s values of the two devices were similar.…”

Low-Temperature Growing Anatase TiO2/SnO2 Multi-dimensional Heterojunctions at MXene Conductive Network for High-Efficient Perovskite Solar Cells

“…The series resistance (R s ) mainly reflects electrical contacts, wires, and sheet resistance of the electrodes [43,53]. The charge-transfer resistance (R tr ) means the charge-transfer property at the interface, and R rec means the recombination of carriers [43,54]. Fitted with ZView software, it can be observed that the R s values are similar for these samples.…”

Recent Progress on Self‐Healable Conducting Polymers

“…Scratches made by a razor blade on a porous composite aerogel (thickness of 200 µm), consisting of PEDOT:PSS and reduced graphene oxide (rGO), were healed after treatment with water vapor for 30 min. [114] This property was exploited to fabricate self-healing capacitors, which showed a retention of ≈95% after eight damaging/healing cycles. Films of a block copolymer containing PEDOT, soft segments of poly(poly(ethylene glycol) methyl ether acrylate) (PPEGMEA), and hard segments of PSS (thickness of ≈300 nm, conductivity of ≈0.05 S cm −1 ) showed water induced healing with an efficiency of ≈50%.…”