Fabrication and evaluation of Ni-based air-cathode

2020 ◽  
Vol 64 (1-4) ◽  
pp. 65-71
Author(s):  
Yuhei Tsuji ◽  
Dang-Trang Nguyen ◽  
Kozo Taguchi
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Synthesis Method ◽  
Ozone Treatment ◽  
Air Cathode ◽  
Carbon Sheet ◽  
Air Battery ◽  
Temperature And Pressure ◽  
Materials Used ◽  
Uv Ozone

This study focused on investigating low-cost but high-performance catalyst materials used for the air cathode of the aluminum-air battery. Nickel, in the form of Ni(OH)2, was used as the catalyst because it is abundant and low-cost. The activated carbon sheet was used as the substrate to load the catalyst. The solvothermal synthesis method was used to synthesize the catalyst. The advantage of the solvothermal method is that the particle size can be reduced under high temperature and pressure conditions. The operation of some types of air-cathodes was examined. UV-ozone treatment of the air-cathode has also been investigated to enhance the performance of the battery.

Aluminum-Air Battery with Buckypaper Air Cathode

2021 ◽  
Vol 891 ◽  
pp. 99-104
Author(s):  
Yosuke Ito ◽  
Dang Trang Nguyen ◽  
Kozo Taguchi
Keyword(s):  
Low Cost ◽  
Chemical Vapor ◽  
Ozone Treatment ◽  
Chemical Vapor Deposition Method ◽  
Air Cathode ◽  
Filtration Method ◽  
Electronic Performance ◽  
Carbon Sheet ◽  
Air Battery ◽  
Uv Ozone

Thin films made of carbon nanotubes are called buckypaper (BP), which is expected to be applied to electronic devices. Usually, BP is made by the chemical vapor deposition method. In this study, we used the vacuum filtration method to make low-cost BP. To justify the outstanding electronic performance of the fabricated BP, it was utilized to make the air-cathode of the aluminum-air battery. Since the BP is lighter and has a larger specific surface area than the carbon sheet, the aluminum-air battery can be miniaturized while increasing its performance. Furthermore, UV-ozone treatment was also applied to further improve the performance of the BP because it is able to clean and improve the surface conditions.

Enhancing the power generation of Rhodopseudomonas palustris-based MFC

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1261-1268
Author(s):  
Shu Otani ◽  
Dang-Trang Nguyen ◽  
Kozo Taguchi
Keyword(s):  
Activated Carbon ◽  
Rhodopseudomonas Palustris ◽  
Ozone Treatment ◽  
Maximum Power Density ◽  
On Demand ◽  
Long Time ◽  
Dry Conditions ◽  
Carbon Sheet ◽  
Uv Ozone

In this study, a portable and disposable paper-based microbial fuel cell (MFC) was fabricated. The MFC was powered by Rhodopseudomonas palustris bacteria (R. palustris). An activated carbon sheet-based anode pre-loaded organic matter (starch) and R. palustris was used. By using starch in the anode, R. palustris-loaded on the anode could be preserved for a long time in dry conditions. The MFC could generate electricity on-demand activated by adding water to the anode. The activated carbon sheet anode was treated by UV-ozone treatment to remove impurities and to improve its hydrophilicity before being loaded with R. palustris. The developed MFC could generate the maximum power density of 0.9 μW/cm2 and could be preserved for long-term usage with little performance degradation (10% after four weeks).

scholarly journals Recent Advances in Oxygen Electrocatalysts Based on Perovskite Oxides

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1161 ◽  
Author(s):  
Jun Xu ◽  
Chan Chen ◽  
Zhifei Han ◽  
Yuanyuan Yang ◽  
Junsheng Li ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Precious Metals ◽  
Perovskite Oxides ◽  
Air Battery ◽  
Energy Conversion Devices ◽  
Further Development ◽  
Electrochemical Oxygen

Electrochemical oxygen reduction and oxygen evolution are two key processes that limit the efficiency of important energy conversion devices such as metal–air battery and electrolysis. Perovskite oxides are receiving discernable attention as potential bifunctional oxygen electrocatalysts to replace precious metals because of their low cost, good activity, and versatility. In this review, we provide a brief summary on the fundamentals of perovskite oxygen electrocatalysts and a detailed discussion on emerging high-performance oxygen electrocatalysts based on perovskite, which include perovskite with a controlled composition, perovskite with high surface area, and perovskite composites. Challenges and outlooks in the further development of perovskite oxygen electrocatalysts are also presented.

A high-performance electrocatalytic air cathode derived from aniline and iron for use in microbial fuel cells

RSC Advances ◽  
2014 ◽  
Vol 4 (25) ◽  
pp. 12789-12794 ◽  
Author(s):  
Xinhua Tang ◽  
Haoran Li ◽  
Weida Wang ◽  
Zhuwei Du ◽  
How Yong Ng
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Microbial Fuel Cells ◽  
High Performance ◽  
Low Cost ◽  
Air Cathode

A high-performance and low-cost catalyst derived from aniline and iron was synthesized for use as microbial fuel cell (MFC) air cathodes.

Recent Advances in Pyroelectric Ceramics and Thin Films for Applications in Uncooled Infra-Red Sensor Arrays

2006 ◽  
Vol 45 ◽  
pp. 2503-2513 ◽  
Author(s):  
Roger W. Whatmore
Keyword(s):  
Thin Films ◽  
High Performance ◽  
Spatial Information ◽  
Low Cost ◽  
Sensor Arrays ◽  
Production Costs ◽  
Healthcare Applications ◽  
Infra Red ◽  
And Performance ◽  
Materials Used

Pyroelectric infra-red detector arrays provide an attractive solution to the problem of collecting spatial information on the IR distribution in a scene. They have the property that they are only sensitive to changes in the IR flux. This means that they are particularly-well suited to the monitoring of movements of people in applications such as retail outlets and in safety and healthcare applications. The applications of low cost arrays with limited (few hundred elements) for people sensing and imaging radiometry will be illustrated. The performances and costs of uncooled pyroelectric arrays are ultimately driven by the materials used. For this reason, continuous improvements in materials technology are important. In the area of bulk ceramics, it is possible to obtain significant improvements in both production costs and performance though the use of tape-cast, functionally-gradient materials. The use of directly-deposited ferroelectric thin films on silicon ASIC’s is offering considerable potential for low cost high performance pyroelectric arrays. The challenges involved in developing such materials will be discussed.

scholarly journals Enhancing DSSC conversion efficiency by ozone-treated TiO2 photoanode and optimum CNT/PDDA counter electrode

2020 ◽  
Vol 10 (3) ◽  
pp. 2926
Author(s):  
Yoshiki Kurokawa ◽  
Dang Trang Nguyen ◽  
Ryota Fujimoto ◽  
Kozo Taguchi
Keyword(s):  
Conversion Efficiency ◽  
Counter Electrode ◽  
Low Cost ◽  
Dye Sensitized Solar Cells ◽  
Dye Adsorption ◽  
Ozone Treatment ◽  
Multiwalled Carbon ◽  
Dye Sensitized ◽  
Uv Ozone ◽  
Sensitized Solar Cells

The conversion efficiency of dye-sensitized solar cells (DSSCs) depends on the performance of the photoanode and the counter electrode. In this paper, UV-ozone treatment has been applied to the photoanode to clean and increase the hydrophilicity of the photoanode. As a result, the dye adsorption capacity was improved. Also, low-cost multiwalled carbon nanotube (CNT) combined with poly (diallyl dimethylammonium chloride) (PDDA) was used to fabricate the counter electrode. The CNT/PDDA counter electrode was optimized to maximize its performance. By using the ozone-treated photoanode and optimum CNT/PDDA counter electrode, the conversion efficiency has increased by about 64%.

scholarly journals N/S-Co-Doped Porous Carbon Sheets Derived from Bagasse as High-Performance Anode Materials for Sodium-Ion Batteries

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1203 ◽  
Author(s):  
Lili Wang ◽  
Lei Hu ◽  
Wei Yang ◽  
Dewei Liang ◽  
Lingli Liu ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Anode Materials ◽  
High Performance ◽  
Low Cost ◽  
Electronic Conductivity ◽  
High Capacity ◽  
Treatment Method ◽  
High Specific Surface Area ◽  
Carbon Sheet ◽  
Co Doped

Heteroatom doping is considered to be an efficient strategy to improve the electrochemical performance of carbon-based anode materials for Na-ion batteries (SIBs), due to the introduction of an unbalanced electron atmosphere and increased electrochemical reactive sites of carbon. However, developing green and low-cost approaches to synthesize heteroatom dual-doped carbon with an appropriate porous structure, is still challenging. Here, N/S-co-doped porous carbon sheets, with a main pore size, in the range 1.8–10 nm, has been fabricated through a simple thermal treatment method, using KOH-treated waste bagasse, as a carbon source, and thiourea, as the N and S precursor. The N/S-co-doped carbon sheet electrodes possess significant defects, high specific surface area, enhanced electronic conductivity, improved sodium storage capacity, and long-term cyclability, thereby delivering a high capacity of 223 mA h g−1 at 0.2 A g−1 after 500 cycles and retaining 155 mA h g−1 at 1 A g−1 for 2000 cycles. This work provides a low-cost route to fabricate high-performance dual-doped porous carbonaceous anode materials for SIBs.

Computational Fluid Dynamics Modeling of Fabric Systems for Intelligent Garment Design

MRS Bulletin ◽  
2003 ◽  
Vol 28 (8) ◽  
pp. 568-573 ◽  
Author(s):  
Jim Barry ◽  
Roger Hill ◽  
Paul Brasser ◽  
Michal Sobera ◽  
Chris Kleijn ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Protective Clothing ◽  
High Performance ◽  
Low Cost ◽  
Dynamics Modeling ◽  
Textile Materials ◽  
Property Data ◽  
Materials Used ◽  
Garment Design

AbstractProtective clothing provides laboratory and hazardous-materials workers, firefighters, military personnel, and others with the means to control their exposure to chemicals, biological materials, and heat sources. Depending on the specific application, the textile materials used in protective clothing must provide high performance in a number of areas, for example, impermeability to hazardous chemicals, breathability, light weight, low cost, and durability. Models based on computational fluid dynamics have been developed to predict the performance of protective clothing materials. Such models complement testing by enabling property data from laboratory materials tests to be used in predictions of the performance of integrated multilayer garments under varying environmental conditions.

scholarly journals Multi-Organs-on-Chips for Testing Small-Molecule Drugs: Challenges and Perspectives

Pharmaceutics ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1657
Author(s):  
Berivan Cecen ◽  
Christina Karavasili ◽  
Mubashir Nazir ◽  
Anant Bhusal ◽  
Elvan Dogan ◽  
...  
Keyword(s):  
Small Molecule ◽  
High Throughput Screening ◽  
High Performance ◽  
Low Cost ◽  
Scale Up ◽  
Small Molecule Drugs ◽  
Chip Technology ◽  
Organ On A Chip ◽  
Materials Used ◽  
Potential Therapeutics

Organ-on-a-chip technology has been used in testing small-molecule drugs for screening potential therapeutics and regulatory protocols. The technology is expected to boost the development of novel therapies and accelerate the discovery of drug combinations in the coming years. This has led to the development of multi-organ-on-a-chip (MOC) for recapitulating various organs involved in the drug–body interactions. In this review, we discuss the current MOCs used in screening small-molecule drugs and then focus on the dynamic process of drug absorption, distribution, metabolism, and excretion. We also address appropriate materials used for MOCs at low cost and scale-up capacity suitable for high-performance analysis of drugs and commercial high-throughput screening platforms.

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