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 paper, the performance and fuel utilization of laminar flow-based fuel cells (LFFCs) were investigated for both power density and fuel utilisation, and a finite-element-method simulation was developed to explain the experimental results.
156 citations
TL;DR: A finite state machine based management strategy is first proposed for both the battery/ fuel cell and battery/supercapacitor/fuel cell system and results indicate that the proposed method is able to guarantee the required power during most of the driving cycles.
156 citations
TL;DR: In this article, a 40 Wh/kg Li-ion battery using a Li4Ti5O12 nanostructured anode and a composite activated carbon LiCoO2 cathode was built using plastic Li-ION processing based on PVDF-HFP binder and soft laminate packaging.
156 citations
TL;DR: In this article, the authors demonstrate efficient wavelength conversion using a four-wave mixing effect in a silicon photonic wire waveguide with spot size converters, using a continuously operated 160-mW pump, power density in the waveguide's core was increased up to around 430 MW/cm/sup 2/
Abstract: We demonstrate efficient wavelength conversion using a four-wave-mixing (FWM) effect in a silicon photonic wire waveguide with spot size converters. Applying a continuously operated 160-mW pump, power density in the waveguide's core was increased up to around 430 MW/cm/sup 2/, and the FWM effect was remarkably enhanced. Internal conversion efficiency obtained in an experiment was -10.6 dB. The efficiency was significantly limited by the free-carrier absorption effect.
155 citations
TL;DR: In this article, an electro-codeposition method was used to synthesize a high performance negative electrode composed of a vanadium oxide (V2O5) and polyaniline (PANI) composite.
Abstract: To meet the increasing demand for high energy density supercapacitors, it is crucial to develop positive and negative electrodes with comparable energy density. Previous studies have primarily focused on the development of positive electrodes, while negative electrodes are relatively less explored. Here we report an electro-codeposition method to synthesize a high performance negative electrode composed of a vanadium oxide (V2O5) and polyaniline (PANI) composite. Scanning electron microscopy revealed that the composite film is composed of one-dimensional polymer chains. Energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) confirmed successful incorporation of V2O5 into PANI chains. Significantly, the V2O5–PANI composite nanowires exhibited a wide potential window of 1.6 V (between −0.9 and 0.7 V vs. SCE) and a maximum specific capacitance of 443 F g−1 (664.5 mF cm−2). The flexible symmetric supercapacitor assembled with this composite film yielded a maximum energy density of 69.2 W h kg−1 at a power density of 720 W kg−1, and a maximum power density of 7200 W kg−1 at an energy density of 33.0 W h kg−1. These values are substantially higher than those of other pure V2O5 or PANI based supercapacitors. Moreover, the assembled symmetric supercapacitor device showed an excellent stability with 92% capacitance retention after 5000 cycles. The capability of synthesizing high performance composite electrodes using the electro-codeposition method could open up new opportunities for high energy density supercapacitors.
155 citations