scholarly journals Natural Wolframite Used as Cathode Photocatalyst for Improving the Performance of Microbial Fuel Cells

2018 ◽  
Vol 8 (12) ◽  
pp. 2504
Author(s):  
Junxian Shi ◽  
Anhuai Lu ◽  
Haibin Chu ◽  
Hongyu Wu ◽  
Hongrui Ding
Keyword(s):  
Fuel Cells ◽  
Power Density ◽  
Microbial Fuel Cells ◽  
Environmental Remediation ◽  
Low Cost ◽  
Reduction Process ◽  
Maximum Power ◽  
Maximum Power Density ◽  
Graphite Cathode ◽  
Vis Spectroscopy

Developing simple and cheap electrocatalysts or photocatalysts for cathodes to increase the oxygen reduction process is a key factor for better utilization of microbial fuel cells (MFCs). Here, we report the investigation of natural wolframite employed as a low-cost cathode photocatalyst to improve the performance of MFCs. The semiconducting wolframite was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman spectroscopy. The band gap and photo respond activities were determined by UV-vis spectroscopy and linear sweep voltammetry (LSV), respectively. Compared with the normal graphite cathode, when MFCs were equipped with a wolframite-coated cathode, the maximum power density was increased from 41.47 mW·m−2 to 95.51 mW·m−2. Notably, the maximum power density further improved to 135.57 mW·m−2 under light irradiation, which was 2.4 times higher than with a graphite cathode. Our research demonstrated that natural wolframite, a low-cost and abundant natural semiconducting mineral, showed promise as an effective photocathode catalyst which has great potential applications related to utilizing natural minerals in MFCs and for environmental remediation by MFCs in the future.

Nitrogen and sulfur dual-doped graphene as an efficient metal-free electrocatalyst for the oxygen reduction reaction in microbial fuel cells

2019 ◽  
Vol 43 (24) ◽  
pp. 9389-9395 ◽  
Author(s):  
Cuie Zhao ◽  
Jinxiang Li ◽  
Yan Chen ◽  
Jianyu Chen
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Power Density ◽  
Microbial Fuel Cells ◽  
Reduction Reaction ◽  
Maximum Power ◽  
Maximum Power Density ◽  
Metal Free ◽  
Doped Graphene

In this study, nitrogen- and sulfur-codoped graphene (N/S-G) was prepared and used as an efficient metal-free electrocatalyst for the oxygen reduction reaction (ORR) in microbial fuel cells (MFCs), exhibiting a maximum power density of 1368 mW m−2, relatively higher than that of commercial Pt/C.

scholarly journals Direct Bioelectricity Generation from Sago Hampas by Clostridium beijerinckii SR1 Using Microbial Fuel Cell

Molecules ◽  
2019 ◽  
Vol 24 (13) ◽  
pp. 2397 ◽  
Author(s):  
Mohd Azwan Jenol ◽  
Mohamad Faizal Ibrahim ◽  
Ezyana Kamal Bahrin ◽  
Seung Wook Kim ◽  
Suraini Abd-Aziz
Keyword(s):  
Fuel Cells ◽  
Power Density ◽  
Microbial Fuel Cells ◽  
Starch Content ◽  
Coulombic Efficiency ◽  
Clostridium Beijerinckii ◽  
Maximum Power ◽  
Maximum Power Density ◽  
Bioelectricity Generation ◽  
Wide Range

Microbial fuel cells offer a technology for simultaneous biomass degradation and biological electricity generation. Microbial fuel cells have the ability to utilize a wide range of biomass including carbohydrates, such as starch. Sago hampas is a starchy biomass that has 58% starch content. With this significant amount of starch content in the sago hampas, it has a high potential to be utilized as a carbon source for the bioelectricity generation using microbial fuel cells by Clostridium beijerinckii SR1. The maximum power density obtained from 20 g/L of sago hampas was 73.8 mW/cm2 with stable cell voltage output of 211.7 mV. The total substrate consumed was 95.1% with the respect of 10.7% coulombic efficiency. The results obtained were almost comparable to the sago hampas hydrolysate with the maximum power density 56.5 mW/cm2. These results demonstrate the feasibility of solid biomass to be utilized for the power generation in fuel cells as well as high substrate degradation efficiency. Thus, this approach provides a promising way to exploit sago hampas for bioenergy generation.

Low-Temperature Operating Micro Solid Oxide Fuel Cells with Perovskite-type Proton Conductors

2011 ◽  
Vol 1330 ◽  
Author(s):  
Hiroo Yugami ◽  
Kensuke Kubota ◽  
Yu Inagaki ◽  
Fumitada Iguchi ◽  
Shuji Tanaka ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Low Temperature ◽  
Solid Oxide Fuel Cells ◽  
Power Density ◽  
Proton Conductors ◽  
Solid Oxide ◽  
Maximum Power ◽  
Barium Zirconate ◽  
Oxide Fuel ◽  
Maximum Power Density

ABSTRACTMicro-solid oxide fuel cells (Micro-SOFCs) with yttrium-doped barium zirconate (BZY) and strontium and cobalt-doped lanthanum scandate (LSScCo) electrolytes were fabricated for low-temperature operation at 300 °C. The micro-SOFC with a BZY electrolyte could operate at 300 °C with an open circuit voltage (OCV) of 1.08 V and a maximum power density of 2.8 mW/cm2. The micro-SOFC with a LSScCo electrolyte could operate at 370 °C; its OCV was about 0.8 V, and its maximum power density was 0.6 mW/cm2. Electrochemical impedance spectroscopy revealed that the electrolyte resistance in both the micro-SOFCs was lower than 0.1 Ωcm2, and almost all of the resistance was due to anode and cathode reactions. Although the obtained maximum power density was not sufficient for practical applications, improvement of electrodes will make these micro-SOFCs promising candidates for power sources of mobile electronic devices.

scholarly journals Enhancement in Cathodic Redox Reactions of Single-Chambered Microbial Fuel Cells with Castor Oil-Emitted Powder as Cathode Material

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4454
Author(s):  
Shobha Suresh Kumbar ◽  
Dipak Ashok Jadhav ◽  
Chetan S. Jarali ◽  
Dhananjay B. Talange ◽  
Asif Afzal ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Power Density ◽  
Microbial Fuel Cells ◽  
Castor Oil ◽  
Redox Reactions ◽  
Low Cost ◽  
Clay Material ◽  
Cathode Catalysts ◽  
Anodic Chamber ◽  
Maximum Voltage

Microbial fuel cell (MFC) would be a standalone solution for clean, sustainable energy and rural electrification. It can be used in addition to wastewater treatment for bioelectricity generation. Materials chosen for the membrane and electrodes are of low cost with suitable conducting ions and electrical properties. The prime objective of the present work is to enhance redox reactions by using novel and low-cost cathode catalysts synthesized from waste castor oil. Synthesized graphene has been used as an anode, castor oil-emitted carbon powder serves as a cathode, and clay material acts as a membrane. Three single-chambered MFC modules developed were used in the current study, and continuous readings were recorded. The maximum voltage achieved was 0.36 V for a 100 mL mixture of domestic wastewater and cow dung for an anodic chamber of 200 mL. The maximum power density obtained was 7280 mW/m2. In addition, a performance test was evaluated for another MFC with inoculums slurry, and a maximum voltage of 0.78 V and power density of 34.4093 mW/m2 with an anodic chamber of 50 mL was reported. The present study’s findings show that such cathode catalysts can be a suitable option for practical applications of microbial fuel cells.

Improved Maximum Power Density of Alkaline Membrane Fuel Cells (AMFCs) by the Optimization of MEA Construction

2019 ◽  
Vol 28 (30) ◽  
pp. 221-225 ◽  
Author(s):  
Kenji Fukuta ◽  
Hiroshi Inoue ◽  
Yohei Chikashige ◽  
Hiroyuki Yanagi
Keyword(s):  
Fuel Cells ◽  
Power Density ◽  
Maximum Power ◽  
Maximum Power Density ◽  
Alkaline Membrane

scholarly journals Application of a direct current circuit to pick up and to store bioelectricity produced by microbial fuel cells

2019 ◽  
Vol 48 (3) ◽  
pp. 26-35
Author(s):  
Daniel Gonzalo Arboleda Avilés ◽  
Oscar Fernando Núñez Barrionuevo ◽  
Omar Fernando Sánchez Olmedo ◽  
Billy Daniel Chinchin Piñan ◽  
Daniel Alexander Arboleda Briones ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Fuel Cells ◽  
Direct Current ◽  
Microbial Fuel Cells ◽  
Output Voltage ◽  
Low Voltage ◽  
Low Cost ◽  
Clean Energy ◽  
Maximum Power Density ◽  
Biochemical Reactors

Every year the demand for energy worldwide is increasing. There are some alternatives to reduce these problems, such as clean energy or renewable energy. A particular alternative is the microbial fuel cells. These cells are biochemical reactors that convert chemical energy into electricity. The present research evaluated the dairy serum to produce bioelectricity from micro fuel cells (MFC) that were constructed with low-cost materials and with isolated bacteria in anaerobic sediments, located in Ecuadorian national territory, producing maximum voltages of 0.830 V in the circuit and a maximum power density of 30mW / m2. This low voltage was worked with 50 mL MFCs and with an output voltage of 300 mV. Under these conditions, a FLYBACK lift circuit isolated by the transformer was designed. This new circuit could increase the voltage from 30 mV to enough voltage to light a 2.5 V LED. Therefore, the energy produced by the MFC can be directly used to light a LED and to charge capacitors. This study shows that these MFCs, together with the designed circuit, could be used potentially to generate clean energy.

Study of the electrooxidation of borohydride on a directly formed CoB/Ni-foam electrode and its application in membraneless direct borohydride fuel cells

2017 ◽  
Vol 5 (30) ◽  
pp. 15879-15890 ◽  
Author(s):  
Siqi Guo ◽  
Jie Sun ◽  
Zhengyan Zhang ◽  
Aokai Sheng ◽  
Ming Gao ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Power Density ◽  
Electroless Plating ◽  
Maximum Power ◽  
Maximum Power Density ◽  
Ni Foam ◽  
Plating Method ◽  
Direct Borohydride Fuel Cells ◽  
Electroless Plating Method

CoB/Ni-foam was directly formed on a Ni-foam substrate using the electroless plating method. A membraneless DBFC with CoB/Ni-foam (7EP) as an anode showed a maximum power density of 230 mW cm−2.

A direct carbon fuel cell with a CuO–ZnO–SDC composite anode

RSC Advances ◽  
2016 ◽  
Vol 6 (55) ◽  
pp. 50201-50208 ◽  
Author(s):  
Wenbin Hao ◽  
Yongli Mi
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Power Density ◽  
Anode Material ◽  
Maximum Power ◽  
Maximum Power Density ◽  
Composite Anode ◽  
Direct Carbon Fuel Cell ◽  
Direct Carbon Fuel Cells

A direct carbon fuel cell with a CuO–ZnO–SDC composite anode was demonstrated. The maximum power density was 130 mW cm−2 at 700 °C. The results indicate that CuO–ZnO can be used as a nickel-free anode material for direct carbon fuel cells.

Increasing the Operating Temperature of Nafion Membranes with Addition of Nanocrystalline Oxides for Direct Methanol Fuel Cells

2002 ◽  
Vol 756 ◽  
Author(s):  
Vincenzo Baglio ◽  
Alessandra Di Blasi ◽  
Antonino S. Arico' ◽  
Vincenzo Antonucci ◽  
Pier Luigi Antonucci ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Power Density ◽  
Direct Methanol Fuel Cells ◽  
Maximum Power ◽  
Nafion Membrane ◽  
Membrane Electrode ◽  
Maximum Power Density ◽  
Nafion Membranes ◽  
Direct Methanol ◽  
Methanol Fuel Cells

ABSTRACTComposite Nafion membranes containing various amounts of TiO2 (3%, 5% and 10%) were prepared by using a recast procedure for application in high temperature Direct Methanol Fuel Cells (DMFCs). The electrochemical behaviour was compared to that of a membrane-electrode assembly (MEA) based on a bare recast Nafion membrane. All the MEAs containing the Nafion-titania membranes were able to operate up to 145°C, whereas the assembly equipped with the bare recast Nafion membrane showed the maximum performance at 120°C. A maximum power density of 340 mW cm-2 was achieved at 145°C with the composite membrane in the presence of oxygen feed, whereas the maximum power density with air feed was about 210 mW cm-2.

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