This paper discusses the design, fabrication, and test of a CMOS active clamp circuit. The active clamp is a linear voltage regulator, with a voltage deadband to allow for voltage ripple, that is designed to operate in parallel with a switchmode voltage regulator. Its specific function is to sink or source large transient currents to microprocessor loads, thus allowing operation with very small...

We report a scalable one-step electrode fabrication approach for synthesizing composite carbon-based supercapacitors with synergistic outcomes. Multi-walled carbon nanotubes (MWCNTs) were successfully integrated into our modified electrophoretic deposition process to directly form composite MWCNT-GO electrochemical capacitor electrodes (where GO is graphene oxide) with superior performance to s...

This paper presents results obtained with 4 cm2 Carbon/Carbon supercapacitors cells in organic electrolyte. In the first approach, a surface treatment for Al current collector foil via the sol–gel route has been used in order to decrease the Al/active material interface resistance. Performances obtained with this original process are: a low equivalent series resistance (ESR) of 0.5 Ω cm2 and a ...

Polyaniline is one of the most common electrode materials for supercapacitors. The morphology polyaniline directly affects properties polyaniline. In this paper, a new method preparing hollow nanospheres described. Polyaniline-S with solid and structures are successfully synthesized by hydrothermal method, through varying amounts catalyst oxidant. prepared have uniform particle size, smooth sur...

A facile and potentially transferrable approach to enhance the PANI specific capacitance through incorporation of MOF nanocrystals, as a microporous filler (nanogens), into matrix provide ion-diffusion channels within matrix.

In this work, the morphology of ZnO nanostructures is engineered to demonstrate enhanced supercapacitor characteristics of ZnO nanocones (NCs) compared to ZnO nanowires (NWs). ZnO NCs are obtained by chemically etching ZnO NWs. Electrochemical characteristics of ZnO NCs and NWs are extensively investigated to demonstrate morphology dependent capacitive performance of one dimensional ZnO nanostr...

Abstract Parasitic parameters such as leakage inductance and distributed capacitance of planar transformers have a direct impact on the performance efficiency transformers. Traditional methods for parasitic parameter prediction are commonly based empirical formulas or simulation software, but they problems high computational complexity, time-consuming low accuracy. In this paper, method predict...

This work reports a new graphene-based composite for supercapacitor material, and the maximum specific capacitance of 1760.72 F g(-1) at a scan rate of 5 mV s(-1), with excellent cycling stability.