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RESEARCH PAPERS

# Evaluation of an Alkaline Fuel Cell for Multifuel System

[+] Author and Article Information
A. Verma, A. K. Jha

Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India

S. Basu

Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, Indiasbasu@chemical.iitd.ac.in

J. Fuel Cell Sci. Technol 2(4), 234-237 (Mar 16, 2005) (4 pages) doi:10.1115/1.2039955 History: Received May 18, 2004; Revised March 16, 2005

## Abstract

The performance of an alkaline fuel cell (AFC) is investigated using three different fuels, e.g., methanol, ethanol, and sodium borohydride. $Pt∕C∕Ni$ was used as anode, whereas $MnO2∕C∕Ni$ was used as standard (Electro-Chem-Technic, UK) cathode for all the fuels. Fresh mixture of electrolyte, potassium hydroxide (5M), and fuel (2M) was fed to AFC and withdrawn at a rate of $1ml∕min$. The anode was prepared by dispersing platinum and activated carbon in Nafion® (DuPont USA) dispersion and placing it onto a carbon paper (Lydall, USA). Finally prepared anode material was pressed onto Ni mesh and sintered to produce the required anode. The maximum power density of $16.5mW∕cm2$ is obtained at $28mA∕cm2$ of current density for sodium borohydride at $25°C$, whereas methanol produces $31.5mW∕cm2$ of maximum power density at $44mA∕cm2$ of current density at $60°C$. The results obtained showed that the AFC could accept multifuels.

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## Figures

Figure 1

(a) Schematic diagram of an alkaline fuel cell. 1. Fuel-electrolyte mixture storage; 2. exhausted-fuel-electrolyte mixture storage; 3, 4. peristaltic pumps; 5. load; 6. anode terminal; 7. cathode terminal; 8. air; 9. anode electrode; 10. cathode electrode; 11. fuel and electrolyte mixture; 12. magnetic stirrer; and 13. anode shield. (b) Photograph of alkaline fuel cell for multifuel system

Figure 2

I-V characteristics for different fuels in an alkaline fuel cell at 25°C

Figure 3

I-V characteristics for different fuels in an alkaline fuel cell at 60°C

Figure 4

Plot for power density versus current density for different fuels in an alkaline fuel cell at 25°C

Figure 5

Plot for power density versus current density for different fuels in an alkaline fuel cell at 60°C

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