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


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.

Download full-text


Available from: Nurul A. Choudhury, Apr 01, 2015
310 Reads
  • Source
    • "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]. "
    [Show abstract] [Hide abstract]
    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
    International Journal of Hydrogen Energy 09/2014; 39(26):14312–14321. DOI:10.1016/j.ijhydene.2014.04.099 · 3.31 Impact Factor
  • Source
    • "BH 4 − /OH − /H 2 O [19] [20] [21] [22] [23] [24] "
    01/2014; 2014(1):1-10. DOI:10.1155/2014/670209
    • "The same set of experiments was repeated in 0.01 M NaBH 4 + 2 M NaOH solution at temperatures of 35, 45, 55 and 65 • C. Furthermore, CV study was performed for other NaBH 4 concentrations , namely 0.03 and 0.06 M, in 2 M NaOH supporting electrolyte at 25 • C. As mentioned before, the competition between the BH 4 − direct oxidation and its hydrolysis is governed not only by the anode material but by the electrolyte solution composition as well [4] [49]. "
    [Show abstract] [Hide abstract]
    ABSTRACT: Electrochemical oxidation of sodium borohydride (NaBH4) at carbon-supported platinum (Pt/C) and carbon-supported bimetallic platinum alloys (Pt0.75M0.25/C, with M = Ni or Co) is studied in alkaline media using cyclic voltammetry and linear scan voltammetry with rotating disc electrode. Main kinetic parameters (e.g., charge transfer coefficients, number of electrons exchanged, standard heterogeneous rate constants and activation energies) for NaBH4 oxidation on these electrocatalysts are determined. Results indicate the highest catalytic activity of Pt0.75Ni0.25/C alloy electrocatalyst, followed by Pt0.75Co0.25/C, while the lowest activity is observed for Pt/C electrocatalyst. The influence of electrolyte composition and temperature on NaBH4 electrooxidation at the three materials is also explored. The good performance of these bimetallic alloys makes them a lower cost alternative to single Pt as electrocatalysts for the direct borohydride fuel cell anode.
    Electrochimica Acta 09/2013; 107:577-583. DOI:10.1016/j.electacta.2013.06.040 · 4.50 Impact Factor
Show more