Abstract
Principally, renewable energy technology produces energy by converting natural resources into useful forms of energy. Bio-battery is an alternative natural energy source that utilizes nanoparticles from plants to generate electricity. In this study, coffee grounds were used as an electrolyte paste to produce bio-battery. This study aims to determine the potential use of spent coffee grounds as an electrolyte paste. Furthermore, the analysis of the composition of the best coffee grounds to produce the optimum current and the level of effectiveness of the bio-battery in terms of the current value. To determine whether there is an effect of coffee grounds concentration on the resulting current, a series of experiments were carried out to determine the best composition between the type and concentration of coffee grounds. Characterization of the device produces a maximum voltage of 1.11 ± 0.09 V and a power of 0.25 mW. The combination of series and parallel needs to be developed to achieve higher circuit voltages and power.
Highlights
Renewable energy technology produces energy by converting natural resources into useful forms of energy
This study aims to determine the potential use of spent coffee grounds as an electrolyte paste
“Association of coffee consumption with total and cause-specific mortality in 3 large prospective cohorts,” Circulation, vol 132, no
Summary
Skema perancangan tahapan penelitian terdiri dari 3 tahapan yaitu preparasi, karakterisasi sifat kelistrikan dan analisis kelistrikan ampas kopi. Preparasi sampel dimulai dengan menimbang berat kopi masing masing seberat 40 gram kemudian dimasukkan ke dalam kemasan plastik. Ampas kopi yang telah dipreparasi selanjutnya dipersiapakan untuk proses identifikasi sifat kelistrikan. Identifikasi kelistrikan yang dilakukan meliputi arus (mA) dan tegangan (mV) menggunakan multimeter digital (Sanwa CD800a). Susunan alat uji seperti pada Gambar 1a, pada bagian penutup kemasan plastik diberi lubang yang disesuaikan dengan besar ukuran elektroda. Susunan pengukuran sifat kelistikan alat bio-baterai ampas kopi seperti ditunjukkan pada Gambar 1b. Sifat kelistrikan bio-baterai ampas kopi diambil setiap 24 jam kemudian uji analisis pada semua sampel dilakukan untuk dikaji lebih lanjut. (a) Skema susunan bio-baterai [9], (b) Susunan alat bio-baterai ampas kopi Gambar 1. (a) Skema susunan bio-baterai [9], (b) Susunan alat bio-baterai ampas kopi
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