Performance and Stability of Carbonate Fuel Cell Electrodes

2010 ◽  
Author(s):  
Abdelkader Hilmi ◽  
Chao-Yi Yuh ◽  
Mohammad Farooque
Keyword(s):  
Fuel Cell ◽  
Electrochemical Performance ◽  
Mechanical Strength ◽  
Low Temperatures ◽  
Electrolyte Composition ◽  
Fuel Cell Electrodes ◽  
Electrolyte Retention ◽  
Polarization Studies ◽  
Useful Life ◽  
Carbonate Fuel Cell

Polarization studies and post analysis have been carried out for characterizing the electrochemical performance and processes affecting life and stability of carbonate fuel cell electrodes. Based on this understanding optimized electrodes design and new electrolyte composition were developed to improve cell performance and achieve the useful life of >5 years. The anode performance and stability were improved by developing an optimized microstructure with better electrolyte retention capabilities. Tests with an advanced electrolyte composition showed 25 mV improvement at 650°C and more than 45 mV at low temperatures compared to baseline. The NiO dissolution in advanced electrolyte is reduced by >60% compared to baseline electrolyte. Anode and cathode electrodes showed stable mechanical strength and stable electrochemical performance.

Parametric Investigations of Direct Methanol Fuel Cell Electrodes Manufactured by Spraying

2011 ◽  
Author(s):  
Babar M. Koraishy ◽  
Sam Solomon ◽  
Jeremy P. Meyers ◽  
Kristin L. Wood
Keyword(s):  
Thin Film ◽  
Fuel Cell ◽  
Electrochemical Performance ◽  
Direct Methanol Fuel Cell ◽  
Membrane Electrode ◽  
Coating Process ◽  
Fuel Cell Electrodes ◽  
Direct Methanol ◽  
Continuous Fabrication ◽  
Methanol Fuel Cell

Manufacture of fuel cell electrodes by the thin-film method was originally proposed by Wilson et al. [1, 2] for proton-exchange membrane fuel cells (PEMFCs). This technology was subsequently utilized for the manufacture of direct methanol fuel cell (DMFC) electrodes by Ren et al. [3]. Key processing steps in the thin-film process are catalyst ink formulation and its application. The catalyst ink is typically composed of supported or unsupported catalysts, binder (ionomer), solvents and additives. Rheological properties of the ink, amount of binder, and choice of solvents are tuned to match the particular ink application process used to fabricate the electrode, as each coating process has its own unique requirements. Besides affecting the coating process, the choice and ratios of these components can significantly affect the electrochemical performance of the electrode. In this study, catalyst inks are designed and investigated for the spraying process, for utilization in the continuous fabrication of DMFC electrodes. For this purpose, the effect of the binder (ionomer) content on the performance of the electrodes is studied in detail. Decal-transfer electrodes are fabricated on a custom-built automated spraying apparatus with individually specified anode and cathode binder contents, and assembled to form a catalyst coated membrane (CCM) type membrane electrode assembly (MEA). These electrodes are rigorously tested to specifically identify their electrochemical performance, catalyst utilization and electrode morphology.

A study on the electrochemical performance of 100-cm2 class direct carbon-molten carbonate fuel cell (DC-MCFC)

2015 ◽  
Vol 40 (15) ◽  
pp. 5144-5149 ◽  
Author(s):  
Sun Hee Choi ◽  
Dong-nyeok Park ◽  
Chang Won Yoon ◽  
Sung-Pil Yoon ◽  
Suk Woo Nam ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Electrochemical Performance ◽  
Molten Carbonate Fuel Cell ◽  
Molten Carbonate ◽  
Carbonate Fuel Cell
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