Ti2Zr2O8 nanotube as an additive in the fuel cell membrane and catalyst layer for improved low humidity operation

2021 ◽  
Vol 509 ◽  
pp. 230386
Author(s):  
Maxwell Tsipoaka ◽  
Md. Abdul Aziz ◽  
Juahn Park ◽  
Sangaraju Shanmugam
Keyword(s):  
Fuel Cell ◽  
Cell Membrane ◽  
Catalyst Layer ◽  
Low Humidity

Synthesis and Characterization of Sulfonated PVDF TiO2-Natural Zeolite Nanocomposites Membrane

2019 ◽  
Vol 811 ◽  
pp. 147-152
Author(s):  
Juliandri ◽  
Agung Nurfadillah ◽  
Rukiah ◽  
Muhamad Nasir ◽  
Rubianto A. Lubis
Keyword(s):  
Fuel Cell ◽  
Cell Membrane ◽  
Natural Zeolite ◽  
Alternative Energy ◽  
Sol Gel ◽  
Membrane Conductivity ◽  
Alternative Energy Sources ◽  
Low Humidity ◽  
Concentrated Sulfuric Acid

Fuel cell is one of the future alternative energy sources. Commercial fuel cell membrane currently used is Nafion which has several disadvantages including low stability at high temperature, and low conductivity at low humidity. Therefore, it is necessary to study an alternative membrane for PEMFC. The purpose of this research is to synthesis an alternative fuel cell membrane from sulfonated PVDF doped with nanocomposites of natural zeolite of Cipatujah, West Java, Indonesia and TiO2 nanoparticles. The synthesis of zeolite-TiO2 nanocomposites was performed by sol-gel method using TEOT and zeolite of Cipatujah. The nanocomposites were added to PVDF in DMSO solvent prior to ultrasonification for 1, 2 and 3 hours. The membrane was casted and sulfonated with concentrated sulfuric acid for 4, 6 and 8 hours. The membrane was characterized with FTIR, SEM-EDX, and four-point probe spectroscope. The FTIR analysis shows the existence of sulfone in the polymer. The SEM-EDX results show that the SiO2 from the zeolite and TiO2 have been successfully inserted to the membrane. The conductivity analysis shows that the best membrane conductivity, 0.00389 S/cm was achieved for 6 hours sulfonation and 3 hours ultrasonication.

Effect of catalyst layer on fatigue life and fracture mechanisms of fuel cell membrane

2021 ◽  
Author(s):  
Shouwen Shi ◽  
Jiayao Li ◽  
Bingshuang Gao ◽  
Hailong Dai ◽  
Qiang Lin ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Fuel Cell ◽  
Cell Membrane ◽  
Catalyst Layer ◽  
Fracture Mechanisms

scholarly journals Modifying the Catalyst Layer Using Polyvinyl Alcohol for the Performance Improvement of Proton Exchange Membrane Fuel Cells under Low Humidity Operations

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1865 ◽  
Author(s):  
Prathak Jienkulsawad ◽  
Yong-Song Chen ◽  
Amornchai Arpornwichanop
Keyword(s):  
Fuel Cell ◽  
Polyvinyl Alcohol ◽  
Proton Exchange Membrane ◽  
Catalyst Layer ◽  
Gas Diffusion ◽  
Proton Exchange ◽  
Membrane Electrode ◽  
Power Sources ◽  
Low Humidity ◽  
Exchange Membrane

A proton exchange membrane fuel cell (PEMFC) system for the application of unmanned aerial vehicles is equipped without humidifiers and the cathode channels of the stack are open to the environment due to limited weight available for power sources. As a result, the PEMFC is operated under low humidity conditions, causing membrane dehydration, low performance, and degradation. To keep the generated water within the fuel cell to humidify the membrane, in this study, polyvinyl alcohol (PVA) is employed in the fabrication of membrane electrode assemblies (MEAs). The effect of PVA content, either sprayed on the gas diffusion layer (GDL) or mixed in the catalyst layer (CL), on the MEA performance is compared under various humidity conditions. The results show that MEA performance is increased with the addition of PVA either on the GDL or in the CL, especially for non-humidified anode conditions. The result suggested that 0.03% PVA in the anode CL and 0.1% PVA on the GDL can improve the MEA performance by approximately 30%, under conditions of a non-humidified anode and a room-temperature-humidified cathode. However, MEAs with PVA in the anode CL show better durability than those with PVA on the GDL according to measurement with electrochemical impedance spectroscopy.

A framework ensemble facilitates high Pt utilization in a low Pt loading fuel cell

2021 ◽  
Vol 11 (8) ◽  
pp. 2957-2963
Author(s):  
Jian Wang ◽  
Guangping Wu ◽  
Wenhui Xuan ◽  
Lishan Peng ◽  
Yong Feng ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Phase Field ◽  
Active Sites ◽  
Catalyst Layer ◽  
Three Phase ◽  
Pt Utilization ◽  
The Cross ◽  
Low Pt Loading ◽  
Effective Transfer

Rationally designing the structure of catalyst layer in MEA to achieve the dispersion of active sites at the cross of three-phase field and the effective transfer network paths for protons through catalysts and catalyst layer.

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