Topic
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.
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TL;DR: In this article, an array of manganese oxide nanowires were electrodeposited into anodized alumina membranes and used as cathodes for high energy and high power density Li ion batteries.
63 citations
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TL;DR: Li et al. as mentioned in this paper proposed a zinc-ion hybrid micro-supercapacitor (ZIHMSC) by designing a Ti3C2Tx MXene based electrode as capacitor-type anode and vanadium pentoxide (V2O5)-based electrode as battery-type cathode.
63 citations
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TL;DR: In this paper, a large-area lateral power MOSFET with a unique metal interconnect scheme and a chip-scale package was proposed for DC/DC converters to power future CPU cores.
Abstract: DC/DC converters to power future CPU cores mandate low-voltage power metal-oxide semiconductor field-effect transistors (MOSFETs) with ultra low on-resistance and gate charge. Conventional vertical trench MOSFETs cannot meet the challenge. In this paper, we introduce an alternative device solution, the large-area lateral power MOSFET with a unique metal interconnect scheme and a chip-scale package. We have designed and fabricated a family of lateral power MOSFETs including a sub-10 V class power MOSFET with a record-low R/sub DS(ON)/ of 1m/spl Omega/ at a gate voltage of 6V, approximately 50% of the lowest R/sub DS(ON)/ previously reported. The new device has a total gate charge Q/sub g/ of 22nC at 4.5V and a performance figures of merit of less than 30m/spl Omega/-nC, a 3/spl times/ improvement over the state of the art trench MOSFETs. This new MOSFET was used in a 100-W dc/dc converter as the synchronous rectifiers to achieve a 3.5-MHz pulse-width modulation switching frequency, 97%-99% efficiency, and a power density of 970W/in/sup 3/. The new lateral MOSEFT technology offers a viable solution for the next-generation, multimegahertz, high-density dc/dc converters for future CPU cores and many other high-performance power management applications.
63 citations
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TL;DR: In this article, a room temperature air breathing direct ethanol fuel cells (AEM-DEFCs) equipped with Pd-based anodes, anion exchange membranes and FeCo/C cathode electrocatalysts were investigated.
Abstract: Carbon supported nanostructured palladium or palladium alloys are considered the best performing anode electrocatalysts currently employed in alkaline electrolyte membrane direct ethanol fuel cells (AEM-DEFCs). High initial peak power densities are generally obtained as Pd preferentially favors the selective oxidation of ethanol forming acetate thus avoiding strongly poisoning intermediates such as CO. However, few studies exist that investigate DEFC performance in terms of both energy efficiency and discharge energy density, as well as power density depending on the concentration of fuel. In this paper we have determined such parameters for room temperature air breathing AEM-DEFCs equipped with Pd based anodes, anion exchange membranes and FeCo/C cathode electrocatalysts. Combined with the optimization of the fuel composition a maximum energy efficiency of ≈7 % was obtained for this AEM-DEFC. Such a performance suggests that devices of this type are suitable for supplying low power applications such as small portable electronic devices.
63 citations
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23 Sep 2003
TL;DR: In this paper, a power supply module with an ultrathin, high-efficiency switching dc-dc converter system was proposed to meet increasing demand for smaller, thinner and lighter devices in portable electronic equipment.
Abstract: This letter describes a power supply module with an ultrathin, high-efficiency switching dc-dc converter system in order to meet increasing demand for smaller, thinner and lighter devices in portable electronic equipment Usually, the inductor is the largest passive components in a converter system We formed inductors on ferrite wafers as a substrate to mount an IC chip using thin film technology This realized a significantly small and thin module The external size of the module is 35 mm /spl times/ 35 mm /spl times/ 10 mm Its maximum output power is 1 W, and its efficiency is up to 934% A high power density of 816 W/cc was realized
63 citations