Enhancement in open-circuit voltage of implantable CMOS-compatible glucose fuel cell by improving the anodic catalyst

2016 ◽  
Vol 56 (1S) ◽  
pp. 01AH04 ◽  
Author(s):  
Kiichi Niitsu ◽  
Takashi Ando ◽  
Atsuki Kobayashi ◽  
Kazuo Nakazato
Keyword(s):  
Fuel Cell ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Anodic Catalyst ◽  
Cmos Compatible

Wafer-scale development and experimental verification of 0.36 mm2228 mV open-circuit-voltage solid-state CMOS-compatible glucose fuel cell

2018 ◽  
Vol 57 (4S) ◽  
pp. 04FM04 ◽  
Author(s):  
Shigeki Arata ◽  
Kenya Hayashi ◽  
Yuya Nishio ◽  
Atsuki Kobayashi ◽  
Kazuo Nakazato ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Solid State ◽  
Scale Development ◽  
Experimental Verification ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Wafer Scale ◽  
Cmos Compatible

Open Circuit Voltage and Single Walled Carbon Nanotube (wt%) Dependency in Solid-State Complementary Metal Oxide Semiconductor-Compatible Glucose Fuel Cells

2020 ◽  
Vol 12 (1) ◽  
pp. 101-106
Author(s):  
Md. Zahidul Islam ◽  
Shigeki Arata ◽  
Kenya Hayashi ◽  
Atsuki Kobayashi ◽  
Kiichi Niitsu
Keyword(s):  
Carbon Nanotube ◽  
Fuel Cell ◽  
Open Circuit Voltage ◽  
Complementary Metal Oxide Semiconductor ◽  
Open Circuit ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Cmos Compatible

Solid-state complementary metal oxide semiconductor (CMOS)-compatible glucose fuel cells, with single-walled carbon nanotube (SWCNT) films and different amounts of carbon nanotube (wt%) were investigated. Those with a SWCNT content of 3 wt% were found to develop the highest open circuit voltage (OCV) of 400 mV, together with a high electrical conductivity, a power density of 0.53 μW/cm2 and current density of 1.31 μA/cm2. Measurements were performed by dipping the anode into a 30 mM glucose solution. The OCV and power density increased together with the fuel cell concentration. The developed fuel cell uses materials that are biocompatible with the human body (single-walled carbon nanotube-glucose). As a result, it was possible to attain an OCV of 400 mV with a single-walled carbon nanotube content of 3 wt% while improvements in the performance of the CMOS-compatible glucose fuel cell were obtained, and the parameters affecting the performance of the fuel cell were identified. This bio-fuel cell was fabricated using CMOS semiconductor processes on a silicon wafer. These findings are significant to realizing mobile or implantable devices that can be used for biomedical applications.

Preparation of Ce0.8Sm0.2O1.9 Thin Films by Electrophoretic Deposition and their Fuel Cell Performance

2013 ◽  
Vol 566 ◽  
pp. 137-140 ◽  
Author(s):  
Hiroki Ichiboshi ◽  
Kenichi Myoujin ◽  
Takayuki Kodera ◽  
Takashi Ogihara
Keyword(s):  
Thin Films ◽  
Fuel Cell ◽  
Spray Pyrolysis ◽  
Power Density ◽  
Electrophoretic Deposition ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Doped Ceria ◽  
Maximum Power Density ◽  
Fuel Cell Performance

Ce0.8Sm0.2O1.9 (Samaria-doped ceria: SDC) precursors were synthesized by carbon-assisted spray pyrolysis. SDC thin films were prepared by electrophoretic deposition using the SDC precursor particles. The as-prepared SDC thin films were sintered at 1600 °C for 10 h. Uniform films with a thickness of approximately 20 μm were obtained. A fuel cell using the prepared thin films showed a maximum power density of 60.6 mW/cm2 and an open circuit voltage (OCV) of 0.63 V at 700 °C.

Effects of Gas Flow Rate and Catalyst Loading on Polymer Electrolyte Membrane (PEM) Fuel Cell Performance and Degradation

2010 ◽  
Author(s):  
A. Chukwujekwu Okafor ◽  
Hector-Martins Mogbo
Keyword(s):  
Fuel Cell ◽  
Flow Rate ◽  
Gas Flow ◽  
Open Circuit Voltage ◽  
Polymer Electrolyte Membrane ◽  
Open Circuit ◽  
Catalyst Loading ◽  
Gas Flow Rate ◽  
Flow Rates ◽  
Electrolyte Membrane

In this paper, the effects of gas flow rates, and catalyst loading on polymer electrolyte membrane fuel cell (PEMFC) performance was investigated using a 50cm2 active area fuel cell fixture with serpentine flow field channels machined into poco graphite blocks. Membrane Electrode Assemblies (MEAs) with catalyst and gas flow rates at two levels each (0.5mg/cm2, 1mg/cm2; 0.3L/min, 0.5L/min respectively) were tested at 60°C without humidification. The cell performance was analyzed by taking AC Impedance, TAFEL plot, open circuit voltage, and area specific resistance measurements. It was observed that MEAs with lower gas flow rate had lesser cell resistance compared to MEAs with a higher gas flow rate. TAFEL plot shows the highest exchange current density value of −2.05 mAcm2 for MEA with 0.5mg/cm2 catalyst loading operated at reactant gas flow rate of 0.3L/min signifying it had the least activation loss and fastest reaction rate. Open circuit voltage curve shows a higher output voltage and lesser voltage decay rate for MEAs tested at higher gas flow rates.

Determination of Electronic Conductance of 100 cm2 Single Molten Carbonate Fuel Cell

2013 ◽  
Vol 346 ◽  
pp. 23-28
Author(s):  
Jarosław Milewski ◽  
Wojciech Bujalski ◽  
Marcin Wołowicz ◽  
Kamil Futyma ◽  
Jan Kucowski ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Molten Carbonate Fuel Cell ◽  
Molten Carbonate ◽  
Factors Affecting ◽  
Close Relationship ◽  
Electronic Conductance ◽  
Carbonate Fuel Cell

This work considers electronic conductance in a molten carbonate fuel cell and consequences of its existence. The voltage characteristics of cells show differences between a theoretical maximum circuit voltage and open circuit voltage (OCV). A relationship is assumed between the OCV value and electronic conductance. Based on experimental measurements an appropriate mathematical model was created. The model is used to calculate the temperature dependence of electronic conductance for the most popular types of electrolyte: Li2CO3/K2CO3. The results obtained point to the possible existence of a very close relationship between electronic conductance and open circuit voltage. This relationship enables OCV to be calculated when electronic conductance is known. Appropriate formulae can be determined. Temperature is one of the factors affecting electronic conductance. Other influencing factors do exist, but their impact on OCV is not well known. This article mentions some of them.

Glucose Oxidation by Nano-Fibrous Anodes in a Fuel Cell

2008 ◽  
Author(s):  
Pinchas Schechner ◽  
Eugenia Bubis ◽  
Hana Faiger ◽  
Eyal Zussman ◽  
Ehud Kroll
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Power Density ◽  
Peak Power ◽  
Open Circuit Voltage ◽  
Volume Ratio ◽  
Open Circuit ◽  
High Area ◽  
Micrometer Size ◽  
Oxidation Of Glucose

This work adds more experimental evidence regarding the feasibility of using glucose to fuel fuel-cells with anodes that have a high area-to-volume ratio. Electrospinning was used to fabricate sub-micrometer size fibrous electrocatalytic anode membranes for the oxidation of glucose in an alkaline fuel cell (AFC). The fibers of the membranes were made of polyacrylonitrile (PAN) and coated with silver by electroless plating. The anodes were tested while installed in a membranless fuel cell. The results presented include the open circuit voltage, OCV, the polarization curve, the power density as a function of the current density, and the peak power density, PPD. The measurements were performed with constant concentrations of glucose, 0.8 M, and KOH electrolyte solution, 1M. The performance of the anodes was found to improve as the diameter of the silver-plated fibers decreased. The highest PPD of 0.28 mW/cm2 was obtained with an anode made of plated fibers having a mean fiber diameter of 130 nanometers. We conclude from the results that saccharides in general, and glucose in particular, can serve as fuels for fuel cells, and that silver-plated polymeric electrospun electrodes have advantages due to their large surface area.

A dual-electrolyte based air-breathing regenerative microfluidic fuel cell with 1.76 V open-circuit-voltage and 0.74 V water-splitting voltage

Nano Energy ◽  
2016 ◽  
Vol 27 ◽  
pp. 619-626 ◽  
Author(s):  
Haiyang Zou ◽  
Jun Chen ◽  
Yunnan Fang ◽  
Jilai Ding ◽  
Wenbo Peng ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Water Splitting ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Air Breathing ◽  
Microfluidic Fuel Cell

Investigation of the Effects of Catalyst Loading and Gas Flow Rate on Polymer Electrolyte Membrane (PEM) Fuel Cell Performance and Degradation

2011 ◽  
Vol 9 (1) ◽  
Author(s):  
Anthony C. Okafor ◽  
Hector-Martins C. Mogbo
Keyword(s):  
Fuel Cell ◽  
Flow Rate ◽  
Gas Flow ◽  
Open Circuit Voltage ◽  
Polymer Electrolyte Membrane ◽  
Open Circuit ◽  
Catalyst Loading ◽  
Gas Flow Rate ◽  
Flow Rates ◽  
Electrolyte Membrane

In this paper, the effects of gas flow rates and catalyst loading on polymer electrolyte membrane fuel cell (PEMFC) performance was investigated using a 50 cm2active area fuel cell fixture with serpentine flow field channels machined into poco graphite blocks. Membrane electrode assemblies (MEAs) with catalyst and gas flow rates at two levels each (0.5 mg/cm2, 1 mg/cm2; 0.3 l/min, 0.5 l/min, respectively) were tested at 60 °C without humidification. The cell performance was analyzed by taking ac impedance, Tafel plot, open circuit voltage, and area specific resistance measurements. It was observed that MEAs with lower gas flow rate had lesser cell resistance compared to MEAs with a higher gas flow rate. Tafel plot shows the highest exchange current density value of 10−2.05 mA cm2 for MEA with 0.5 mg/cm2 catalyst loading tested at reactant gas flow rate of 0.3 l/min signifying it had the least activation loss and fastest reaction rate. Open circuit voltage-time curve shows a higher output voltage and lesser voltage decay rate for MEAs tested at higher gas flow rates.

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