Concept

Densité massique d'énergie

Publications associées (47)

Use of Vertically-Aligned Carbon Nanotube Array to Enhance the Performance of Electrochemical Capacitors

In the domain of energy storage, electrochemical capacitors have numerous applications ranging from hybrid vehicles to consumer electronics, with very high power density at the cost of relatively low energy storage. Here, we report an approach that uses ve ...

IEEE2011

First search for atmospheric and extraterrestrial neutrino-induced cascades with the IceCube detector

Matthias Wolf, Shirit Cohen, Mathieu Ribordy, Xiaoxia Bai

We report on the first search for atmospheric and for diffuse astrophysical neutrino-induced showers (cascades) in the IceCube detector using 257 days of data collected in the year 2007-2008 with 22 strings active. A total of 14 events with energies above ...

2011

Hydrogen: the future energy carrier

Since the beginning of the twenty-first century the limitations of the fossil age with regard to the continuing growth of energy demand, the peaking mining rate of oil, the growing impact of CO2 emissions on the environment and the dependency of the econom ...

2010

Micro-solid oxide fuel cells as power supply for small portable electronic equipment

Danick Briand, Paul Muralt, Claude Muller, Thomas Maeder, Jérôme Courbat, Bo Jiang, Yan Yan, Alex Dommann, Dimos Poulikakos

Micro-solid oxide fuel cell (SOFC) systems are anticipated for powering small, portable electronic devices, such as laptop, personal digital assistant (PDA), medical and industrial accessories. It is predicted that micro-SOFC systems have a 2-4 higher ener ...

2010

Weight and efficiency optimization strategy of an interleaved DC-DC converter for a solar aircraft

Alfred Rufer, Philippe Barrade, Yannick Louvrier

Today, energy saving is one of the main objectives for engineers. In the case of mobile applications, energy can be saved by two different ways. First, decreasing the total masse of the system, and second, increasing the efficiency of the overall system.Th ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

A 1.5g SMA-actuated Microglider looking for the Light

Dario Floreano, André Guignard, Mirko Kovac, Jean-Daniel Nicoud, Jean-Christophe Zufferey

Unpowered flight can be used in microrobotics to overcome ground obstacles and to increase the traveling distance per energy unit. In order to explore the potential of goal-directed gliding in the domain of miniature robotics, we developed a 22cm microglid ...

Ieee Service Center2007

What is the design objective for portable power generation: Efficiency or energy density?

Benoît Chachuat

Recently, various alternatives to batteries, such as microfabricated fuel cell systems, have been proposed for portable power generation. In large-scale power production plants emphasis is placed on energy conversion efficiency. On the other hand, the intr ...

2007

Redox Targeting of Insulating Electrode Materials: A New Approach to High-Energy-Density Batteries

Michael Graetzel, Qian Wang, Shaik Mohammed Zakeeruddin

A compact energy‐storage system based on redox targeting is proposed, by which insulating LiFePO4 particles can be reversibly charged and discharged by redox shuttle molecules (S; see scheme) even in the absence of conducting additives. The energy density ...

2006

Scaling Laws for Energy-constrained Wireless Networks

Suhas Diggavi, Jasper Goseling

Although there has been much interest in scaling laws for wireless networks, most work has focussed on characterizing throughput and delay in power-constrained networks. Energy-constrained networks have not received much attention. Previous work on energy- ...

2005

Stacking fault tetrahedra formation in the neighbourhood of grain boundaries

Helena Van Swygenhoven

Large scale molecular dynamics computer simulations are performed to study the role of the grain boundary (GB) during the cascade evolution in irradiated nanocrystalline Ni. At all primary knock-on atom (PKA) energies in cascades near GBs, the damage produ ...

2003

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