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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Riau Journal of Empowerment
Nirwan Syarif
Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Economics, Econometrics & Finance Education Environmental Science Social Sciences

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Multichannel Data Aquisition System for Monitoring Supercapacitor Module And Cells Nirwan Syarif; Assaidah Assaidah
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 14, No 4: December 2016
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v14i4.3994

Abstract

This paper is under in-depth investigation due to suspicion of possible plagiarism on a high similarity indexThe monitoring system is needed to observe changes in the voltage of supercapacitor module and cells so that their performance can be assessed. A multichannel data acquisition system was needed to implement because a module of supercapacitor consists of several individual cells. The system can be implemented in a computer program using data acquisition board and computer programming. The computer program acts as computer and user interface was created by using Labview symbolic programming software, while the data acquisition board was Labjack. The test showed that the monitoring system can receive eight channel of input signal (voltage) of the module and cells simultaneously. The voltage of the module which has a wider range, 0-20 volts, rather than the normal input, 0 to 2.44 volts, can be overcome by adding a voltage divider circuit.
Performance Test of Membrane Electrode Assembly in DAFC using Mixed Methanol and Ethanol Fuel with Various Volume Comparison Dwi Hawa Yulianti; Dedi Rohendi; Nirwan Syarif; Addy Rachmat
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 3 (2019): October 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i3.139

Abstract

Direct Alcohol Fuel Cell (DAFC) performance is influenced by electrocatalysis reactions that occur in Membrane Electrode Assembly (MEA). In this study, MEA was made with Pt-Ru/C (anode) and Pt/C (cathode) catalysts. The results of the electrode characterization with XRD showed a carbon peak at 26.63° and Ru at 40.58°. Based on the results of Cyclic Voltammetry (CV) measurements, the Electrochemical Surface Area (ECSA) electrode value is known to be 373.601 cm2/mg. Meanwhile, the impedance value is 4.315 Ω and the electrical conductivity value is 6.61x10-4 S/cm. MEA testing using MeOH 3 M fuel produces Open Circuit Voltage (OCV) of 0.650 V. Meanwhile, MEA performance testing uses a mixture of methanol and ethanol 2 M in loading conditions obtained the best mixture of fuel composition is methanol: ethanol = 90:10 with a maximum power density of 4.34 mW/cm2 and is able to maintain the voltage at 0.649 V under conditions of 6.875 mA/cm2. The results also showed that the volume of ethanol which was too high resulted in a decrease in cell performance in the fuel mixture caused by the competition of adsorption between competing methanol and ethanol occupying the active site of the catalyst.Keywords: DAFC, fuel cell, Pt-Ru/C, ethanol, methanol, Open Circuit Voltage
Improving Students' Understanding of Energy Conservation through Training on Making Electrochemical Storage Devices Nirwan Syarif; Dedi Rohendi
Riau Journal of Empowerment Vol 6 No 1 (2023)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/raje.6.1.42-52

Abstract

This paper reports the activities aimed at teachers and high school students in Lubuk Linggau, which went smoothly, interspersed with questions and answers. Demo and presentation, which are program activities, also run smoothly. The theme of community service activities is making a supercapacitor and battery and explaining the material used to make both energy storage devices. In addition, the team also presented basic knowledge about potentiostats and multimeters as test instruments related to electrochemistry. The activity went smoothly, interspersed with questions and answers—the demo and training have run smoothly. The theme of program activities includes the demo and training of preparing supercapacitor - batteries, explaining the materials - tools employed to make the energy storage devices. In addition, the team also presented basic knowledge about supercapacitors, batteries, potentiostats, and other tools related to electrochemistry. The activities of teachers and students at school took place very enthusiastically in receiving direction and counseling from the team. The enthusiasm can be seen in the active discussions between the team and members of these community groups. Group members feel the positive value of the activities carried out by the team. Generally, the team and participant can work out the ideas contained in the patent well. The team recommends some extended programs to propose, such as (a) similar activities should be carried out continuously to increase acknowledgment. (b) collaborating with others, and (c) developing online lab work.
Co-Authors Addy Rachmat Assaidah, Assaidah Dwi Hawa Yulianti Irwin Bizzy Mardiyanto Mardiyanto Syabaniah, Nyimas Febrika