Power density

About: Power density is a research topic. Over the lifetime, 9534 publications have been published within this topic receiving 197264 citations. The topic is also known as: volumic power & volume power density.

High power supercontinuum generation in a nonlinear ytterbium-doped fiber amplifier

Abstract: High power supercontinuum generation with 70 W average output power in a nonlinear ytterbium-doped fiber amplifier is demonstrated using all-normal dispersion, all-fiber master oscillator power amplifier configuration The supercontinuum covers from 1064 nm to beyond 1700 nm with spectral flatness better than 12 dB and 673% optical to optical conversion efficiency The almost uniform spectral power density across the whole continuum is more than 70 mW/nm and the nanosecond bursts output have an effective peak power of 827 kW

Cobalt-Doped Nickel Phosphite for High Performance of Electrochemical Energy Storage.

Abstract: Compared to single metallic Ni or Co phosphides, bimetallic Ni-Co phosphides own ameliorative properties, such as high electrical conductivity, remarkable rate capability, upper specific capacity, and excellent cycle performance. Here, a simple one-step solvothermal process is proposed for the synthesis of bouquet-like cobalt-doped nickel phosphite (Ni11 (HPO3 )8 (OH)6 ), and the effect of the structure on the pseudocapacitive performance is investigated via a series of electrochemical measurements. It is found that when the cobalt content is low, the glycol/deionized water ratio is 1, and the reaction is under 200 °C for 20 h, the morphology of the sample is uniform and has the highest specific surface area. The cobalt-doped Ni11 (HPO3 )8 (OH)6 electrode presents a maximum specific capacitance of 714.8 F g-1 . More significantly, aqueous and solid-state flexible electrochemical energy storage devices are successfully assembled. The aqueous device shows a high energy density of 15.48 mWh cm-2 at the power density of 0.6 KW cm-2 . The solid-state device shows a high energy density of 14.72 mWh cm-2 at the power density of 0.6 KW cm-2 . These excellent performances confirm that the cobalt-doped Ni11 (HPO3 )8 (OH)6 are promising materials for applications in electrochemical energy storage devices.