scholarly journals Phosphorus/nitrogen co-doped and bimetallic MOF-derived cathode for all-solid-state rechargeable zinc–air batteries

RSC Advances ◽  
2020 ◽  
Vol 10 (55) ◽  
pp. 33327-33333
Author(s):  
Xing Yang ◽  
Xianghua Wu ◽  
Zeping Guo ◽  
Qingyu Li ◽  
Hongqiang Wang ◽  
...  
Keyword(s):  
Solid State ◽  
Power Density ◽  
Peak Power ◽  
Bifunctional Catalyst ◽  
Catalytic Performance ◽  
Peak Power Density ◽  
Air Battery ◽  
Co Doped ◽  
Zinc Air Batteries

The bimetallic FeNi-MOFs are employed to fabricate P–FeNi and N–carbon co-doped bifunctional catalyst. Due to the enhanced catalytic performance, the peak power density of all-solid-state zinc–air battery is 159 mW cm−2.

Highly active Co–N-doped graphene as an efficient bifunctional electrocatalyst (ORR/HER) for flexible all-solid-state zinc–air batteries

2020 ◽  
Vol 4 (12) ◽  
pp. 6165-6173
Author(s):  
Hai-Lang Jia ◽  
Jiao Zhao ◽  
Lei Gu ◽  
Zhi-Jie Peng ◽  
Zheng-Lv Bao ◽  
...  
Keyword(s):  
Solid State ◽  
Solid Electrolyte ◽  
Power Density ◽  
Peak Power ◽  
Bifunctional Electrocatalyst ◽  
Peak Power Density ◽  
Highly Active ◽  
Doped Graphene ◽  
Large Peak ◽  
Zinc Air Batteries

A highly active Co–N-doped graphene bifunctional electrocatalysts was prepared, the flexible ZABs fabricated using PVA + PEO + GO solid electrolyte demonstrate a high Voc (1.49 V) and large peak power density (57 mW cm−2).

Strong correlation between the peak power density in the time domain and the luminosity of long γ-ray bursts

2005 ◽  
Vol 29 (4) ◽  
pp. 361-369 ◽  
Author(s):  
Zhao-yu Yang ◽  
Li-ming Song ◽  
Rong-feng Shen ◽  
Zhuo Li ◽  
Yu-sheng Lu
Keyword(s):  
Power Density ◽  
Time Domain ◽  
Strong Correlation ◽  
Peak Power ◽  
Peak Power Density ◽  
Γ Ray ◽  
The Time Domain

Investigation of Transport Phenomena in Micro Flow Channels for Miniature Fuel Cells

2003 ◽  
Author(s):  
S. W. Cha ◽  
S. J. Lee ◽  
Y. I. Park ◽  
F. B. Prinz
Keyword(s):  
Fuel Cell ◽  
Power Density ◽  
Peak Power ◽  
Gas Flow ◽  
Transport Phenomena ◽  
Cell Performance ◽  
Peak Power Density ◽  
Micro Channels ◽  
Model Predictions ◽  
The Impact

This paper presents a study on the transport phenomena related to gas flow through fuel cell micro-channels, specifically the impact of dimensional scale on the order of 100 microns and below. Especially critical is the ability to experimentally verify model predictions, and this is made efficiently possible by the use of structural photopolymer (SU-8) to directly fabricate functional fuel cell micro-channels. The design and analysis components of this investigation apply 3-D multi-physics modeling to predict cell performance under micro-channel conditions. Interestingly, the model predicts that very small channels (specifically 100 microns and below) result in a significantly higher peak power density than larger counterparts. SU-8 micro-channels with different feature sizes have been integrated into fuel cell prototypes and tested for comparison against model predictions. The results not only demonstrate that the SU-8 channels with metal current collector show quite appreciable performance, but also provide experimental verification of the merits of channel miniaturization. As predicted, the performance in terms of peak power density increases as the feature size of the channel decreases, even though the pressure drop is higher in the more narrow channels. So it has been observed both theoretically and experimentally that cell performance shows an improving trend with micro-channels, and design optimization for miniature fuel cell provides a powerful method for increasing power density.

Tailoring the hetero-structure of iron oxides in the framework of nitrogen doped carbon for the oxygen reduction reaction and zinc–air batteries

2020 ◽  
Vol 8 (48) ◽  
pp. 25791-25804
Author(s):  
Zhourong Xiao ◽  
Chan Wu ◽  
Wei Wang ◽  
Lun Pan ◽  
Jijun Zou ◽  
...  
Keyword(s):  
Peak Power ◽  
Thermal Reduction ◽  
Reduction Reaction ◽  
Hetero Structure ◽  
Reduction Strategy ◽  
Nitrogen Doped ◽  
Carbon Framework ◽  
Air Battery ◽  
Nitrogen Doped Carbon ◽  
Zinc Air Batteries

We report a H2-thermal-reduction strategy to fabricate FeOx/Fe NPs dispersed on a porous N-doped carbon framework. The optimal hybrid exhibited high ORR performance with an E1/2 of 0.838 V and remarkable Zn–air battery performance with a peak power density of 156.6 mW cm−2.

The Influence of Mediator Concentration on the Performance of Microbial Fuel Cell

2012 ◽  
Vol 512-515 ◽  
pp. 1520-1524 ◽  
Author(s):  
Yu Zhao ◽  
Xiao Bin Wang ◽  
Peng Li ◽  
Yan Ping Sun
Keyword(s):  
Methylene Blue ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Power Density ◽  
Peak Power ◽  
Electrochemical Impedance ◽  
Peak Power Output ◽  
Anode Potential ◽  
High Concentration ◽  
Peak Power Density

Electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), power density and anode potential are used to characterize the mediator microbial fuel cell at different methylene blue (MB) concentrations. At lower MB concentration between 9.98×10-3 mmol/L and 1.66×10-1 mmol/L, the increased power density is enabled by using high mediator concentrations. Higher peak power density of 159.6 mw/m2 is observed compared with the peak power density of 36.0 mw/m2. But MB at too high concentration is disadvantageous to the perform of MFC. At the MB concentration of 2.50×10-1 mmol/L, the peak power output is just 128.4 mw/m2, which is lower than 159.6 mw/m2 at MB concentration of 1.66×10-1 mmol/L.

Carbon Nanotube Free-Standing Membrane of Pt/SWNTs as Catalyst Layer in Hydrogen Fuel Cells

2007 ◽  
Vol 60 (7) ◽  
pp. 528 ◽  
Author(s):  
Jason M. Tang ◽  
Kurt Jensen ◽  
Wenzhen Li ◽  
Mahesh Waje ◽  
Paul Larsen ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Fuel Cell ◽  
Power Density ◽  
Peak Power ◽  
Proton Exchange Membrane ◽  
Catalyst Layer ◽  
Proton Exchange ◽  
Free Standing ◽  
Peak Power Density ◽  
Exchange Membrane

A simple and promising fuel-cell architecture is demonstrated using a carbon nanotube free-standing membrane (CNTFSM) made from Pt supported on purified single-walled carbon nanotubes (Pt/SWNT), which act as the catalyst layer in a hydrogen proton exchange membrane fuel cell without the need for Nafion in the catalyst layer. The CNTFSM made from Pt/SWNT at a loading of 0.082 mg Pt cm–2 exhibits higher performance with a peak power density of 0.675 W cm–2 in comparison with a commercially available E-TEK electrocatalyst made of Pt supported on XC-72 carbon black, which had a peak power density of 0.395 W cm–2 at a loading of 0.084 mg Pt cm–2 also without Nafion in the catalyst layer.

scholarly journals Application of platinum-cobalt-boron as the anode material for sodium borohydride-hydrogen peroxide fuel cells

Chemija ◽  
2018 ◽  
Vol 29 (4) ◽  
Author(s):  
Aldona Balčiūnaitė ◽  
Zita Sukackienė ◽  
Loreta Tamašauskaitė-Tamašiūnaitė ◽  
Rimantas Vaitkus ◽  
Eugenijus Norkus
Keyword(s):  
Hydrogen Peroxide ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Power Density ◽  
Anode Materials ◽  
Peak Power ◽  
Anode Catalysts ◽  
Fuel Cell Performance ◽  
Peak Power Density ◽  
Density Values

The electroless deposition and galvanic displacement methods were used for the fabrication of cobalt–boron (CoB) catalysts modified with small amounts of platinum crystallites in the range of 9.8 to 14.4 μgPt cm–2. The prepared catalysts were studied as the anode materials for direct borohydride–hydrogen peroxide (NaBH4/H2O2) fuel cells at temperatures of 25–55°C. Polarization curves have been recorded with the aim to evaluate the fuel cell performance using the prepared CoB and that modified with Pt crystallites as the anode catalysts. For all catalysts (pure CoB and PtCoB) investigated, the peak power density values increase consecutively with the increment in temperature from 25°C up to 55°C. The values from 86–146 mV cm–2 and 146–234 mV cm–2 were determined for pure CoB and PtCoB catalysts, respectively. The highest specific peak power density of 21.5 kWgPt–1 was achieved at 55°C temperature when the PtCoB catalyst with the Pt loading of 9.8 μgPtcm–2 was employed as the anode catalyst in the NaBH4/H2O2 single fuel cell.

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