Sains Malaysiana 39(3)(2010): 467–472

 

Reka Bentuk Optimum Mikro Sel Fuel Metanol Langsung untuk Peralatan Mudah Alih

(Design of an Optimal Micro Direct Methanol Fuel Cell for Portable Applications)

 

M.M. Ahmad, S.K. Kamarudin* & W.R.W. Daud

Institut Sel Fuel, Universiti Kebangsaan Malaysia 43600 UKM Bangi, Selangor D.E., Malaysia

 

Diserahkan: 28 April 2009 / Diterima: 23 November 2009

 

ABSTRAK

 

Halangan utama untuk mengkomersialkan mikro sel fuel metanol langsung (μSFML) sebagai sumber kuasa bagi peralatan mudah alih adalah prestasi sel fuel itu sendiri. Dalam kajian ini, didapati penghasilan keluaran kuasa yang tinggi oleh μSFML iaitu 14.10 mW pada 4 cm2 keluasan kawasan aktif dengan menggunakan muatan mangkin yang rendah, 0.5 mg cm-2 pada bahagian katod telah diperolehi. Penentuan parameter-parameter reka bentuk yang optimum juga telah dikenal pasti. Di samping itu, pengujian ke atas prestasi, jangka hayat dan voltan arus terbuka (OCV) turut dilakukan.

 

Kata kunci: μSFML; muatan mangkin; pengoptimuman

 

ABSTRACT

 

The main constraint for the commercialization of micro Direct Methanol Fuel cell (μDMFC) for small power generation is the performance of the fuel cell. In this study, a high-power μDMFC with a power output of 14.10 mW on an active area of 4 cm2 and catalyst loading of 0.5 mg cm-2 cathode was successfully developed. The optimal parameters for methanol concentration and catalyst loading were determined. Besides that, testing of performance, long term and open circuit voltage (OCV) was also performed.

 

Keywords: μDMFC; catalyst loading; optimization  

 

RUJUKAN

 

Bae, B.C., Kho, B.K., Lim, T.H., Oh, I.H., Hong, S.A. & Ha, H.Y. 2006. Performance evaluation of passive DMFC single cell. Journal of Power Sources 158: 1256-1261.

Chen, C.Y. & Yang, P. 2003. Performance of an air-breating direct methanol fuel cell. Journal of Power Sources 123: 37-42.

Chen, C.Y., Yang, P., Lee, Y.S. & Lin, K.F. 2005. Fabrication of electro catalyst layers for direct methanol fuel cells. Journal of Power Sources 141: 24-29.

Chen, R. & Zhao, T.S. 2007. Performance characterization of passive direct methanol fuel cells. Journal of Power Sources 167: 455-460.

Ito, T., Kimura, K. & Kunimatsu, M. 2006. Characteristics of micro DMFCs array fabricated on flexible polymer subrate. Electrochemistry Communications 8: 973-976.

Kim, D., Cho, E.A., Hong, S.A., Oh, I.H. & Ha, H.Y. 2004. Recent progress in passive direct methanol fuel cell at KIST. Journal of Power Sources 130: 172-177.

Krewer, U., Park, J.Y., Lee, J.H., Cho, H.J., Pak, C.H., You, D.J. & Lee, Y.H. 2009. Low and high temperature storage characteristics of membrane electrode assemblies for direct methanol fuel cells. Journal of Power Sources 187: 103- 111.

Lam, A., Wilkinson, D.P. & Zhang, J. 2009. A novel single electrode supported direct metanol fuel cell. Electrochemistry Communications 11: 1530- 1534.

Qi, Z. & Kaufman, A. 2002. Open circuit voltage and methanol crossover in DMFCs. Journal of Power Sources 110: 177- 185.

Yang, W.M., Chou, S.K. & Shu, C. 2007. Effect of current collector structure on performance of passive micro direct methanol fuel cell. Journal of Power sources 164: 549- 554.

Zhang, J., Yin, G.P., Lai, Q.Z., Wang, Z.B., Cai, K.D. & Liu, P. 2007. The influence of anode gas diffusion layer on the performance of low temperature DMFC. Journal of Power Sources 168: 453-458.

Zhong, L., Wang, X., Jiang, Y., Zhang, Q., Qiu, X., Zhou, Y. & Liu L. 2008. A micro-direct methanol fuel cell stack with optimized design and micro fabrication. Sensors & Actuators 143: 70-76.

 

*Pengarang untuk surat-menyurat; email: ctie@vlsi.eng.ukm.my