Abstract
Amorphous perfluoroalkenyl vinyl ether polymer devices can store a remarkably powerful electric charge because their surface contains nanometre-sized cavities that are sensitive to the so-called quantum-size effect. With a work function of approximately 10 eV, the devices show a near-vertical line in the Nyquist diagram and a horizontal line near the −90° phase angle in the Bode diagram. Moreover, they have an integrated effect on the surface area for constant current discharging. This effect can be explained by the distributed constant electric circuit with a parallel assembly of nanometre-sized capacitors on a highly insulating polymer. The device can illuminate a red LED light for 3 ms after charging it with 1 mA at 10 V. Further gains might be attained by integrating polymer sheets with a micro-electro mechanical system.
Highlights
Storage systems for electrical energy have been investigated extensively over the past three decades[1,2,3,4,5]
We assumed a surface structure consisting of a distributed constant-equivalent circuit of resistance and capacitance, and one that is analogous to the active carbons in electric double-layer capacitors (EDLCs)
We report here about the superior electric storage on a polymer with high electrical resistance
Summary
The APVEP film with nanometre-cluster was prepared by doping a 3-aminopropyl (triethoxy) silane-coupling reagent into the APP. Sheet specimens with a thickness of 15 μ m were fabricated on the Si substrate by spin-coating. The specific density, glass-transition temperature, and water-adsorption rate was 2.03, 471 K, and 0.01%, respectively[22]. The devices were fabricated mechanically[8]. Scanning Kelvin probe-force microscopy (NC-AFM, JSPM-5200, JEOL) based on the measurement of electrostatic force gradient was applied to measure the absolute electrical potential between the Pt-coated cantilever tip at 0 and 20 V and the APP surface as the work-function difference. The DC charging/discharging behaviour was analysed at 10 V, 1 pA~1 mA for ~300 s at room temperature, with a complex impedance between 1 mHz and 1 M Hz and 10 mV, using the galvanostatic charge/discharge on a potentiostat/galvanostat (SP-150, BioLogic Science). A red LED lump with standard power of 2 × 10−4 W was used to verify the electric storage
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