Effect of stanum on the properties of graphite-stanum composite for bipolar plate

Muhammad Yusri , Md Yusuf (2013) Effect of stanum on the properties of graphite-stanum composite for bipolar plate. Project Report. UTeM. (Submitted)

Text EFFECT OF ST ANUM ON THE PROPERTIES OF GRAPHITE ST ANUM COMPOSITE FOR BIPOLAR PLATE 24pages.pdf Download (5MB)

Abstract

Bipolar plate is an important key component in fuel cell on the basis of its manifold function. Based on these phenomena's there are a lot of effort is going on worldwide to make conductive composites which more high conductive. This research is study the electrical and mechanical properties of GraphitelStannum (GISn) composites as prospective conductive composite to replace the traditional G as bipolar plate in proton-exchange membrane fuel cells (PEMFC). The main problems with the traditional bipolar plate materials such as metal and graphite materials are corrode, too brittle and low in electricity conductivity; but for G-Sn composite have potential to eliminate the above problems. Meanwhile the advantages of Sn as compare other materials are good conductor of electricity, high-strength materials and have the low melting point. In this research, focus is given to Sn and its effects on the properties on GISt composite. The raw materials used to produce thus composite is G as a filler and Sn as a binder or resin. The weight percentage of GISn has been be fixed at 80120, 70130 and 60140. Before the composite shaped by using hot press machine, the G and Sn has be mixed used ball mill. The effects of Sn on the electrical conductivity and mechanical properties of GISn composite need to be determined as well as the critical loading of Sn in GISn composite before can be used as GISn composite for bipolar plate. Based on results, the properties of composite such as electrical conductivity and density, the weight percentage of 20 wt% of Sn gives maximum value of electrical conductivity (719.05 Siem). This value was achieved DOE requirement (> 100 Siem). There are decreasing values of electrieal conductivity for higher Sn content. It also interesting to note that with increasing the Sn content, density properties in decreased and satisfied the OOE target which is - 1.9 gem ·3 • From this 3 different composition the test has been done according to ASTM (American Society for Testing and Materials) and composition of 80% G 20% Sn is shows the best result.

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