نتایج جستجو برای: micro supercapacitor
تعداد نتایج: 118181 فیلتر نتایج به سال:
Tiny autonomous systems less than 1 mm across need small energy storage to satisfy the demand for temporary pulse power and consistent supply. A battery or supercapacitor alone cannot meet both requirements. Integration of is an alternative, but it introduces a device (supercapacitor) that not frequently invoked requires substantial space. Herein, submillimeter (0.42 mm2) high-power with additi...
Electrochemical capacitors with fast charging-discharging rates are very promising for hybrid electric vehicle industries including portable electronics. Complicated pore structures have been implemented in active materials to increase energy storage capacity, which often leads to degrade dynamic response of ions. In order to understand this trade-off phenomenon, we report a theoretical model b...
The electric capacitance of an amorphous TiO2-x surface increases proportionally to the negative sixth power of the convex diameter d. This occurs because of the van der Waals attraction on the amorphous surface of up to 7 mF/cm2, accompanied by extreme enhanced electron trapping resulting from both the quantum-size effect and an offset effect from positive charges at oxygen-vacancy sites. Here...
Supercapacitor is a promising solution to storage of pulsed energy generated by MEMS harvesting systems, relying on its faster charging/discharging capability than secondary battery. To improve the density on-chip supercapacitor which shows potential for integration with devices, in this paper we first present successful electrode design high specific pseudo-supercapacitors basis deep reactive ...
Research on micro-supercapacitors remains one of the most important activities in area electrochemical energy storage for powering smart and miniaturized electronic devices. Here we design an asymmetric micro-supercapacitor (A-MSC) combining sputtered vanadium nitride film (VN) electrodeposited hydrous ruthenium oxide (hRuO2) film. Taking advantage their complementary potential windows 1 M KOH ...
In order to meet the growing need for smart bionic devices and epidermal electronic systems, biaxial stretchability is essential for energy storage units. Based on porous single-walled carbon nanotube/poly(3,4-ethylenedioxythiophene) (SWCNT/PEDOT) hybrid fiber, we designed and fabricated a biaxially stretchable supercapacitor, which possesses a unique configuration of the parallel buckled hybri...
This paper discusses the basic considerations and development of a prototype demo system for the wireless charging of supercapacitor electric vehicles, which uses magnetic resonance coupling. Considering future ubiquitous wireless vehicle stationary and dynamic charging facilities, supercapacitor could be an ideal device to store a reasonable amount of electrical energy for a relatively short p...
In order to fabricate the composite electrodes of a supercapacitor, transition-metal oxide materials NiO and WO3 were deposited on carbon electrodes by electron beam evaporation. The influences of various transition-metal oxides, scan rates of cyclic voltammograms (CVs), and galvanostatic charge/discharge tests on the characteristics of supercapacitor were studied. The charge/discharge efficien...
Li₄Ti₅O₁₂/activated carbon hybrid supercapacitor can combine the advantages of both lithium-ion battery and supercapacitor, which may meet the requirements for developing high-performance hybrid electric vehicles. Here we proposed a novel "core-shell" porous graphitic carbon (PGC) to replace conventional activated carbon for achieving excellent cell performance. In this PGC structure made from ...
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