Article

A comprehensive review of direct borohydride fuel cells

Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210, USA
Renewable and Sustainable Energy Reviews (Impact Factor: 5.9). 01/2010; 14(1):183-199. DOI: 10.1016/j.rser.2009.08.002

ABSTRACT

A direct borohydride fuel cell (DBFC) is a device that converts chemical energy stored in borohydride ion (BH4−) and an oxidant directly into electricity by redox processes. Usually, a DBFC employs an alkaline solution of sodium borohydride (NaBH4) as fuel and oxygen or hydrogen peroxide as oxidant. DBFC has some attractive features such as high open circuit potential, ease of electro-oxidation of BH4− on non-precious metals such as nickel, low operational temperature and high power density. The DBFC is a promising power system for portable applications. This article discusses prominent features of DBFC, reviews recent developments in DBFC research, and points out future directions in DBFC research.

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Available from: Nurul A. Choudhury, Apr 01, 2015
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    • "A disadvantage is that the NaBO 2 byproduct (although environmentally friendly), needs to be collected in a separate tank in order to be recycled off board into NaBH 4 . For more information on the role of NaBH 4 in the field of hydrogen fueled applications, the reader is referred to more in-depth articles and reviews[7,88899091. "
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    ABSTRACT: This review describes recent research in the development of tank systems based on complex metal hydrides for thermolysis and hydrolysis. Commercial applications using complex metal hydrides are limited, especially for thermolysis-based systems where so far only demonstration projects have been performed. Hydrolysis-based systems find their way in space, naval, military and defense applications due to their compatibility with proton exchange membrane (PEM) fuel cells. Tank design, modeling, and development for thermolysis and hydrolysis systems as well as commercial applications of hydrolysis systems are described in more detail in this review. For thermolysis, mostly sodium aluminum hydride containing tanks were developed, and only a few examples with nitrides, ammonia borane and alane. For hydrolysis, sodium borohydride was the preferred material whereas ammonia borane found less popularity. Recycling of the sodium borohydride spent fuel remains an important part for their commercial viability.
    Preview · Article · Sep 2015 · Materials
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    • "Among the various renewable energy sources, fuel cells are gaining more popularity due to their higher efficiency, cleanliness and cost-effective supply of power demanded by the consumers (Kirubakaran et al., 2009). Among the different types of fuel cells, direct borohydride fuel cells (DBFC) have attracted increasing interest over the past decade, because of their favorable reaction kinetics in alkaline media, higher energy densities achievable and the easy handling of the liquid fuels (Ma et al., 2009; Ponce de Leon et al., 2006). DBFC are devices that convert chemical energy stored in borohydride ion (BH 4 − ) and an oxidant directly into electricity by redox processes. "
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    ABSTRACT: In this study, Pd and Au were deposited on Ni-foam and examined as electrocatalysts for borohydride electrooxidation. The Pd-Au deposits were developed by co-deposition from mixed solutions of Pd2+ and Au3+ with different ratios of both metals. The corrosion resistance of the obtained materials in 6M KOH electrolyte was evaluated by linear voltammetry. The electrocatalytic performance of the developed electrodes towards borohydride electrooxidation reaction was analysed by means of chronopotentiometric and anodic polarization measurements in stabilized alkaline solution of sodium borohydride. The obtained results with different electrodes were compared and discussed in respect to their potential application as anodes in Direct Borohydride Fuel Cells.
    Full-text · Article · Jan 2015
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    • "This will reduce the half-cell potential of the cathode because H 2 O 2 electrochemical reduction is more favorable at low pH [13]. The pH dependence of the half-cell potential of the H 2 O 2 reduction reaction is given in equation (1) [5]. "
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    ABSTRACT: Direct borohydride fuel cells (DBFCs) using liquid hydrogen peroxide as the oxidant are safe and attractive low temperature power sources for unmanned underwater vehicles (UUVs) as they have excellent energy and power density and do not feature compressed gases or a flammable fuel stream. One challenge to this system is the disparate pH environment between the anolyte fuel and catholyte oxidant streams. Herein, a bipolar interface membrane electrode assembly (BIMEA) is demonstrated for maintaining pH control of the anolyte and catholyte compartments of the fuel cell. The prepared DBFC with the BIMEA yielded a promising peak power density of 110 mW cm(-2). This study also investigated the same BIMEA for a hydrogen-oxygen fuel cell (H-2-O-2 FC). The type of gas diffusion layer used and the gas feed relative humidity were found to impact fuel cell performance. Finally, a BIMEA featuring a silver electrocatalyst at the cathode in a H-2-O-2 FC was successfully demonstrated. Copyright
    Full-text · Article · Sep 2014 · International Journal of Hydrogen Energy
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