Behavior of PEMFC in starvation

Liu, Zhixiang; Yang, Lizhai; Mao, Zongqiang; Zhuge, Weilin; Zhang, Yangjun; Wang, Lisheng

doi:10.1016/j.jpowsour.2005.08.006

Cited by 191 publications

(94 citation statements)

References 18 publications

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“…Under such a high potential, the carbon supports would severely corrode. [7][8][9] As seen in Figure 8 a, the carbon support shows a significant increase in the oxidation current after a potential hold at 1.6 V for 10 h. In addition, the large redox couple at 0.6 V strongly suggests that severe carbon corrosion has occurred. In contrast, only a negligible change in the CV is observed for WO 3 (Figure 8 b), indicating good resistance towards oxidation when subjected to high potentials.…”

Section: Electrochemical Propertiesmentioning

confidence: 89%

“…Carbon support oxidation, however, also occurs at the anode side. When fuel starvation occurs, hydrogen oxidation is no longer sufficient to maintain the current, and then the anode potential can reach as high as 1.6 V. [7][8][9] Such a high potential would accelerate the kinetics of electrochemical carbon corrosion at the anode and lead to significant degradation of the fuel cell. In addition, the carbon corrosion at the anode could weaken the attachment of Pt particles to the carbon support and decrease the electronic continuity of the catalyst layer.…”

Section: Introductionmentioning

confidence: 99%

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A Highly Stable Anode, Carbon‐Free, Catalyst Support Based on Tungsten Trioxide Nanoclusters for Proton‐Exchange Membrane Fuel Cells

et al. 2012

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Durability is an important issue in proton‐exchange membrane fuel cells (PEMFCs). One of the major challenges lies in the degradation caused by the oxidation of the carbon support under high anode potentials (under fuel starvation conditions). Herein, we report highly stable, carbon‐free, WO3 nanoclusters as catalyst supports. The WO3 nanoclusters are synthesized through a hard template method and characterized by means of electron microscopy and electrochemical analysis. The electrochemical studies show that the WO3 nanoclusters have excellent electrochemical stability under a high potential (1.6 V for 10 h) compared to Vulcan XC‐72. Pt nanoparticles supported on these nanoclusters exhibit high and stable electrocatalytic activity for the oxidation of hydrogen. The catalyst shows negligible loss in electrochemically active surface area (ECA) after an accelerated durability test, whereas the ECA of the Pt nanoparticles immobilized on conventional carbon decreases significantly after the same oxidation condition. Therefore, Pt/WO3 could be considered as a promising alternative anode catalyst for PEMFCs.

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Section: Electrochemical Propertiesmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

A Highly Stable Anode, Carbon‐Free, Catalyst Support Based on Tungsten Trioxide Nanoclusters for Proton‐Exchange Membrane Fuel Cells

et al. 2012

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“…Fuel or oxidant starvation is a complicated phenomenon that refers to the operation of fuel cells under substoichiometric reaction conditions, and is one of the potential causes of fuel cell failure [8,41]. In the case of fuel starvation, the amount of hydrogen is insufficient for the normal oxidation process that maintains the current.…”

Section: Reactant Gas Starvationmentioning

confidence: 99%

“…Consequently the anode potential rises to the level required for oxidizing the water. This results in the evolution of oxygen and protons at the anode, as in [8,41,42] …”

Section: Reactant Gas Starvationmentioning

confidence: 99%

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A Review of the Main Power Electronics' Advances in Order to Ensure Efficient Operation and Durability of PEMFCs

et al. 2012

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Original scientific paperThis article focuses on the main issues that affect the lifetime and performance of proton-exchange membrane fuel cells. The short lifespans of these fuel cells represent a barrier to their massive commercialization and usage in mobile and stationary applications. As fuel cell is a very complex system, a lot of knowledge of different areas is required, such as chemistry, electricity and mechanics, in order to completely understand its operation and all the problems that can occur during it. It is for this reason that an interdisciplinary approach needs to be taken when designing fuel-cell energy systems. This paper focuses on identifying and solving those issues that negatively affect the lifetime and performance of fuel cells. It is hoped that this article would be a valuable aid for power electronics' researchers and engineers for better understanding the presented issues and a useful guide for solving them with the use of proper power electronic-devices. Initially, the basic operation and structure of a proton-exchange membrane fuel cell is explained. Three main issues that can occur during operation of a mobile or stationary fuel cell energy system are pointed out and discussed in details, on the basis of the state-of-the-art on fuel cell technology. These issues are poor water management, reactant gas starvation and fuel cell current ripple. This article provides answers as to why they occur, how they affect the fuel cell, how they can be mitigated, and what are the future trends within this research field.Key words: PEMFC, Water management, Reactant gas starvation, Current ripple, Power electronics.Pregled znanstvenih napredaka u učinskoj elektronici usmjerenih ka osiguravanju efikasnog rada i dužeg životnog vijeka PEM gorivihćelija.Članak se osvrće na ključna pitanja koja utječu na vrijeme rada i performanse gorivihćelija s polimernom membranom kao elektrolitom. Kratak životni vijek gorivihćelija takve vrste prepreka je njihovoj komercijalizaciji i masovnoj upotrebi u mobilnim i stacionarnim stanicama. Budući da su gorivećelije komplicirani sustavi potrebno je znanje iz raznih područja kemije, elektrotehnike i mehanike da bi se u potpunosti mogao razumjeti njihov način rada i problemi koji se dogadaju. Upravo je zbog toga multidisciplinarni pristup nužnost pri razvoju sustava koji koriste gorivećelije. Ovaj ječlanak usmjeren prema identifikaciji i rješavanju onih problema koji negativno utječu na životni vijek i performanse gorivihćelija. Autori se nadaju daće sečlanak pokazati kao korisna pomoć i vodič istraživačima i inženjerima u domeni učinske elektronike pri susretu s navedenim problemima. Objašnjen je način rada i struktura gorivećelije s polimernom membranom kao elektrolitom. Izložena su, i diskutirana do u detalje, tri glavna problema sa stajališta trenutačnih spoznaja u području učinske elektronike. Ti problemi su: loše upravljanje vodom, nestanak reaktantnog plina i strujni trzaji u gorivimćelijama. Objašnjeno je zašto se ovi problemi dogadaju, kako utječu na gorivućelij...

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References

2018

Hybridization, Diagnostic and Prognostic of Proton Exchange Membrane Fuel Cells

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Behavior of PEMFC in starvation

Cited by 191 publications

References 18 publications

A Highly Stable Anode, Carbon‐Free, Catalyst Support Based on Tungsten Trioxide Nanoclusters for Proton‐Exchange Membrane Fuel Cells

A Highly Stable Anode, Carbon‐Free, Catalyst Support Based on Tungsten Trioxide Nanoclusters for Proton‐Exchange Membrane Fuel Cells

A Review of the Main Power Electronics' Advances in Order to Ensure Efficient Operation and Durability of PEMFCs

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