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Bambang Prihandoko, Bambang
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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PENGARUH VARIASI WAKTU PENCAMPURAN TERHADAP PELAT BIPOLAR DENGAN PENAMBAHAN 5% wt MULTIWALLED CARBON NANOTUBES Prihandoko, Bambang; Pirsiani, Rizki; Sadeli, Yunita
Telaah Vol 32, No 2 (2014)
Publisher : Research Center for Physics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/tel.32.2.184

Abstract

Paper ini membahas pembuatan pelat bipolar karbon/karbon komposit dengan filler 80% wt, yang terdiri dari 95% wt grafit dapur busur listrik (electric arc furnace/EAF) dan 5% wt multiwalled carbon nanotubes (MWCNTs). Di samping itu, polimer yang bertindak sebagai matriks berjumlah 20% wt terdiri dari epoksi resin dan hardener dengan perbandingan 1:1. Penelitian pembuatan pelat bipolar ini memvariasikan waktu pencampuran yaitu 30, 60, 90, 120, dan 150 detik. Proses pencampuran menggunakan pengaduk berkecepatan tinggi dengan kecepatan 28000 rpm. Pencetakan menggunakan metode cetak kompresi panas dengan tekanan 55 MPa pada suhu 100 oC selama 4 jam. Hasil penelitian menunjukkan bahwa waktu pencampuran optimum pada 30 detik di mana dihasilkan nilai densitas sebesar 1.61 g/cm3, porositas 0.30%, dan konduktivitas listrik 7.53 S/cm.
Synthesis of LiBOB Fine Powder to Increase Solubility Wigayati, Etty Marti; Lestariningsih, Titik; Ratri, Christin Rina; Purawiardi, Ibrahim; Prihandoko, Bambang
Makara Journal of Technology Vol. 21, No. 1
Publisher : UI Scholars Hub

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Abstract

Lithium bis (oxalate) borate or LiBOB compound has captured interest of researchers, because it is potentially viable to be used as electrolyte salt in lithium-ion battery system. This compound is easy to synthesize and considered to be more environmentally friendly compared to conventional electrolyte salt because LiBOB does not contain halogen element. This research focused on the synthesis of LiBOB fine powder, which main purpose is improving LiBOB salt solubility in liquid electrolyte solution. This will aid the ion transfer between electrodes which in turn will increase the electrolyte performance. Solid state reaction was employed in this experiment. Synthesis of LiBOB compound was performed by reacting oxalic acid dihydrate, lithium hydroxide monohydrate, and boric acid. The resulting powder was then processed into fine powder using ball milling technique with varying milling time (0, 6, 10, and 13) hour. Microstructure of the sample was then analyzed to obtain information regarding phase formation, functional groups, grain surface morphology, surface area, pore volume, solubility, and ionic conductivity. The analysis shown that LiBOB and LiBOB hydrate phase was formed during the reaction, there was no changed in existing phase during milling process, crystallinity index was shifted to lower value but there was no difference in functional groups. Highest value in surface area was found to be 83.11 m2/g, with pore volume of 1.21311e+02 A at 10 hours milling. Smaller powder size resulted in higher solubility, unfortunately the ionic conductivity was found to be decreased.
Co-Authors Christin Rina Ratri, Christin Rina Dedy Setiawan Etty Marti Wigayati Ibrahim Purawiardi, Ibrahim Rizki Pirsiani, Rizki SUBHAN, ACHMAD - Titik Lestariningsih, Titik Yunita Sadeli, Yunita