Pengaruh variasi ukuran partikel carbon black 5% padakarakter komposit pelat bipolar PEMFC bermatriks grafit EAF 53 mikron
| Main Author: | Fajar Angga Nugraha, author |
|---|---|
| Format: | Bachelors |
| Terbitan: |
Fakultas Teknik Universitas Indonesia
, 2011
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| Subjects: | |
| Online Access: |
http://lib.ui.ac.id/file?file=digital/20297004-S1763-Fajar Angga Nugraha.pdf |
Daftar Isi:
- [<b>ABSTRAK</b><br> Pelat bipolar memiliki berat 60-80% dari berat berat total sel tunam dan berfungsi sebagai penghantar elektron serta menopang komponen sel tunam lainnya sehingga pelat bipolar diharapkan mempunyai konduktivitas dan sifat mekanis yang baik. Pelat bipolar dibuat dengan mencampurkan limbah grafit electric arc furnace (EAF), carbon black, dan resin epoksi sehingga tercipta suatu pelat dari karbon-karbon komposit. Grafit bertindak sebagai matriks sedangkan carbon black sebagai filler dan resin epoksi berfungsi sebagai binder. Grafit yang digunakan mempunyai ukuran partikel 53 μm, sedangkan untuk carbon black digunakan kombinasi antara ukuran partikel 44μm dan 37 μm dengan perbandingan 100:0; 90:10; 80:20; 70:30. Pelat bipolar dicetak dengan metode compression moulding pada tekanan 450 kg/cm2 dan temperatur 700C selama empat jam. Penambahan carbon black 37 μm ke dalam campuran carbon black 44 μm dan grafit 53 μm terbukti mampu meningkatkan konduktivitas dan menurunkan porositas. Konduktivitas paling tinggi terdapat pada pelat bipolar dengan penambahan carbon black 37μm 30% sebesar 15,7 x 10-4 S/cm dan porositas paling rendah terdapat pada pelat bipolar dengan penambahan carbon black 37μm 20% yang menghasilkan porositas sebesar 0.71%. Namun untuk kekuatan fleksural, semakin banyak penambahan carbon black 37 μm kekuatan fleksural semakin menurun. Kekuatan fleksural optimum terdapat pada carbon black 37 μm 0% dengan kekuatan sebesar 20,85 MPa. Penambahan carbon black 37μm 30% meningkatkan densitas pelat hingga 1.73 g/cm3. <hr> <b>ABSTRACT</b><br> The weight of bipolar plate has 60-80% of total fuel cell stack weight and also as the support of all the component in fuel stack, with the reason of that bipolar plate should has good conductivity dan better mechanical properties. Bipolar plate is made from the mixture of graphite, carbon black, and epoxy resin. The mixture is called carbon-carbon composite. The matrix is the graphite, carbon black as the reinforcement and resin epoxy as a binder. The size of graphite is 53 μm and carbon black are the combination of 44 μm and 37 μm particle size with the comparation 100:0; 90:10; 80:20; 70:30. Bipolar plate is made with compression moulding method, the pressure is 450 Kg/cm2 and 700C temperature for four hours. The increasing of 37μm carbon black in the combination of 44μm carbon black and 53μm graphite can increase the conductivity and reduce porosity. The sampel with 30% carbon black 37μ has highest conductivity (15,7 x 10-4 S/cm) and the best porosity (0.71%) is sampel with 20% increasing of 37μm carbon black. But the flexural strength decrease with the increase 37μ carbon black and cannot reach the DOE standard. The increase of 37μm carbon black also raise the density of sample until 1,73 g/cm3 with increasing 30% of 37μm carbon black., The weight of bipolar plate has 60-80% of total fuel cell stack weight and also as the support of all the component in fuel stack, with the reason of that bipolar plate should has good conductivity dan better mechanical properties. Bipolar plate is made from the mixture of graphite, carbon black, and epoxy resin. The mixture is called carbon-carbon composite. The matrix is the graphite, carbon black as the reinforcement and resin epoxy as a binder. The size of graphite is 53 μm and carbon black are the combination of 44 μm and 37 μm particle size with the comparation 100:0; 90:10; 80:20; 70:30. Bipolar plate is made with compression moulding method, the pressure is 450 Kg/cm2 and 700C temperature for four hours. The increasing of 37μm carbon black in the combination of 44μm carbon black and 53μm graphite can increase the conductivity and reduce porosity. The sampel with 30% carbon black 37μ has highest conductivity (15,7 x 10-4 S/cm) and the best porosity (0.71%) is sampel with 20% increasing of 37μm carbon black. But the flexural strength decrease with the increase 37μ carbon black and cannot reach the DOE standard. The increase of 37μm carbon black also raise the density of sample until 1,73 g/cm3 with increasing 30% of 37μm carbon black.]