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All Journal Teknika: Jurnal Sains dan Teknologi Journal Industrial Servicess MESIN Automotive Experiences Jurnal Sains Materi Indonesia
Yustinus Purwamargapratala
Pusat Teknologi Bahan Industri Nuklir (PTBIN) – BATAN Kawasan PUSPIPTEK, Serpong, Tangerang
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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INTERAKSI Ag DENGAN SUPERKONDUKTOR BSCCO FASA 2223 Purwamargapratala, Yustinus; Adi, Wisnu Ari
MESIN Vol 8, No 1 (2006)
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Interaction Ag with 2223phaseBSCCO superconductor. The addition o/Ag20 (0, 2.5, 5, and10 wt%Ag) to matrix of2223 phase BSCCO superconductor that sintered at 845 oCfor 72 hours in air have beeninvestigated. The Agadditions promote thedecomposition of2223phasesto 2212phasesBSCCO andcausedpresent some impurities phases. The impurities areproducted bythe Agaddition ableto be usedas effectivelypinning sources to hold vortex (flux line) movement. The Tcmeasurement results are 111 K, 107 K, 105 K,and103Kwith addition ofO, 2.5, 5, and10 wt%Ag respectively. The Jc measurement results are 3.6xl(f,5.6x1(f, 6.9x1(f, and U.8xl(fAm2 with addition ofO, 2.5, 5, and 10 wt%Ag respectively. From theXRDanalysis shown that the addititon ofAg caused peaks of 2212phases BSCCO are clearly visible and thesamples contain some impurities phases (CuO, Ca^CuO^, dan CajPbOJ. From the SEM analysis shown thatthe addititon ofAg should lead to a slight increase of the plate like grain size of 2223phase BSCCO withincreasing Ag content. From this experiment we conclude that the Tc depress and the Jc enhance withincreasing Agcontent. The addititon ofAg should leadtoa slight increase ofthe platelike grain size of 2223phase BSCCO with increasingAg content.
Electric mobility of Indonesia: a strategy for achieving net zero emission by 2050 Listijorini, Erny; Kanani, Nufus; Purwamargapratala, Yustinus; Satria, Dhimas; Sukamto, Dwinanto; Lusiani, Rina; Yusuf, Yusvardi; Jannah, Miftahul; Abdullah, Syarif; Pinem, Mekro Permana
Jurnal Teknika Vol 19, No 1 (2023): Available Online in June 2023
Publisher : Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/tjst.v19i1.19757

Abstract

Electric mobility mode could be a great opportunity to reduce emissions from the transportation sector. The future mobility calculator and electric car power demand, developed by Coalition for Urban Transitions and International Energy Agency, respectively, were used to analyze Indonesia’s shifting strategy toward electric mobility. It was shown that going to electric mobility will reduce 90% of Indonesia’s emissions from the transportation sector by the year 2050. Nevertheless, the charging infrastructure must be improved quickly to provide a proper ecosystem for electric mobility. Additionally, the electric vehicle waste management system is urgently needed soon. The success of shifting toward electric mobility not only benefits Indonesia’s environment but also strengthens its international credibility for sustainable development.             
Synthesis of Acetylene Black and Polyvinylidene Difluoride to Improve the Conductivity of Li-ion Nickel Manganese Cobalt Batteries Dermawan, Totok; Sudjatno, Agus; Yulianto, Edy; Purwamargapratala, Yustinus; Suroso, Suroso; Suhendro, Budi; Wirgiyanto, Ign Agus Purbhadi
Automotive Experiences Vol 8 No 1 (2025)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.12329

Abstract

The issue of low cathode conductivity is a significant challenge in battery development, particularly for automotive applications. The cathode plays a crucial role in Li-ion batteries, as it is responsible for transferring lithium ions during both charging and discharging processes. Therefore, this study aims to enhance the conductivity of the cathode by incorporating Acetylene Black (AB) and Polyvinylidene Difluoride (PVDF) additives. In this study, Nickel Manganese Cobalt (NMC) 811 and NMC 111 cathodes were used. These materials were formed into pellets, then made into sheets, with AB and PVDF additives added in a weight composition ratio of 85:10:5, and a coating thickness of 300 µm. The cathode conductivity was characterized using an LCR meter, while surface morphology, cross-section, EDS, and mapping of the cathode surface were analyzed with SEM. The results showed that the addition of additives increased the conductivity of NMC 111 by more than five times, from 23.27x10-8 S.cm-1 to 119.34x10-8 S.cm-1, and NMC 811 by more than twelve times, from 6.43x10-8 S.cm-1 to 81.79x10-8 S.cm-1. These findings suggest that higher particle density, improved size distribution, and smaller particle grains contribute to higher conductivity.
Nanofluid cooling of 18650 lithium-ion batteries through wavy channel tube Kanani, Nufus; Fatwa, Muhammad Ilham; Yusuf, Yusvardi; Pinem, Mekro Permana; Wahyudi, Hadi; Satria, Dhimas; Sukamto, Dwinanto; Purwamargapratala, Yustinus
Journal Industrial Servicess Vol 10, No 2 (2024): October 2024
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jiss.v10i2.28519

Abstract

The electric vehicle (EV) industries have grown; in 2023 EV sales increased by more than 30% compared to 2022. The central issue of this industry is the battery because of the cost and environmental problems.  This makes efficient battery operation and condition imperative. The electric vehicle lithium-ion batteries are highly temperature-dependent for optimal performance and longevity. A cooling system is needed to maintain the temperature of the lithium-ion battery within the optimal temperature range. This study proposes nanofluid cooling based on Cellulose Nanocrystals (CNC) inside the wavy channel tube. Other fluid cooling, such as air and water, are compared. Three-dimensional (3D) transient simulation is performed by varying the cooling fluid and mass flow rate. On the other hand, experiments were conducted to validate the simulation's conformity to the battery module's temperature. The performance of the cooling fluid inside the wavy channel effectively keeps the battery heat dissipation and temperature uniformity. The nanofluid can maintain the temperature of the battery module at its optimal temperature (below 40°C), even with the lowest flow rate (5×10-4 kg/s).
Synthesis and Characterization of LaF3:Ce Scintillator Material Sukirman, Engkir; Purwamargapratala, Yustinus; Sugeng, Bambang; Wahyudianingsih, Wahyudianingsih; Gunawan, Indra; Ahda, Syahfandi; Sudjatno, Agus; Dimyati, Arbi
Jurnal Sains Materi Indonesia Vol. 25 No. 1 (2023): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2023.185

Abstract

Synthesis and Characterization of LaF3:Ce Scintillator Material.Synthesis and characterization of the LaF3:Ce scintillator have been carried out. Synthesis was carried out using the co-precipitation method. In this study, the raw materials used were NaF, LaCl3•7H2O, and Ce(NO3)3•6H2O with ethanol and distilled water as a solvent; while surfactants were used oleic acid. In this study, the compound LaF3:0.2Ce was synthesized. The sample was characterized by using an X-Ray Diffractometer (XRD), a Scanning Electron Microscope (SEM), and a Spectrofluorometer. The analyzed data showed that the 82.6 weight fraction of LaF3:0.2Ce phase has precipitated accompanied by the formation of NaCl and C2Ce phases of 5.1 and 12.3 weight fraction, respectively. The NaCl phase is a by-product of the chemical reaction: xLaCl3•7H2O + zCeCl3•7H2O + 3NaF → LaxCezF3 + 3NaCl + 7H2O which could be removed from the precipitate solution by an appropriate separation method, while the C2Ce one appeared as a result of heating the sample at 400ºC. The LaF3:Ce scintillator sample shows the phenomenon of a bluish glow with a lifetime, t = 6 × 10-10 seconds even in the presence of a foreign phase. The existence of NaCl and C2Ce as a local environment still makes LaF3:0.2Ce has normal lifetime characteristics.
Co-Authors Arbi Dimyati Bambang Sugeng Dermawan, Totok Dhimas Satria Edy Yulianto Engkir Sukirman Fatwa, Muhammad Ilham Indra Gunawan Jannah, Miftahul Kanani, Nufus Listijorini, Erny Lusiani, Rina Nufus Kanani, Nufus Pinem, Mekro Permana Sudjatno, Agus Suhendro, Budi Sukamto, Dwinanto Sukamto, Dwinanto Suroso Suroso Syahfandi Ahda Syarif Abdullah Wahyudi, Hadi Wahyudianingsih, Wahyudianingsih Wirgiyanto, Ign Agus Purbhadi Wisnu Ari Adi Yusuf, Yusvardi Yusvardi Yusuf