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All Journal Jurnal Sains Materi Indonesia Journal of Batteries for Renewable Energy and Electric Vehicles
Evvy Kartini
Center for Science and Technology of Advanced Materials, BATAN, Puspiptek Serpong, Indonesia
Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Mechanical Engineering

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STUDI FASA TRANSISI KONDUKTOR SUPERIONIK AgI DENGAN HAMBURAN NEUTRON Suminta, Supandi; Kartini, Evvy
Jurnal Sains Materi Indonesia Vol 3, No 1: OKTOBER 2001
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1251.216 KB) | DOI: 10.17146/jusami.2001.3.1.5253

Abstract

STUDI FASA TRANSISI DALAM KONDUKTOR SUPERIONIK AgI DENGAN HAMBURAN NEUTRON. Analisis struktur kristal konduktor superionik AgI telah dipelajari sebagai fungsi suhu dengan difraksi neutron serbuk. Untuk mengonfirmasi suhu transisi dan mendapatkan informasi tentang fasa transisi AgI, pengukuran kapasitas panas pada suhu transisi AgI telah ditentukan dengan Diffrensial Scanning Calorimetry (DSC). Hasil yang diperoleh menunjukkan bahwa suhu transisi dimulai pada suhu 420K, dicapai puncak pada 428,1K (gauss fitting curve), mendekati akhir pada 433K dan berakhir pada sekitar 438K. Berdasarkan hasil analisis DSC, pengukuran intensitas difraksi neutron diambil pada suhu mendekati awal, puncak, mendekati akhir dan daerah suhu akhir transisi berturut-turut yakni; 420K, 429K, 433K dan 439K. Struktur Agl pada proses pemanasan (heating) pada daerah suhu transisi di atas telah ditentukan. Pada suhu 420K s.d 439K terjadi perubahan fasa β ke fasa α dan garam Agl berada dalam campuran dua fasa major yakni bersistem kristal Heksagonal (grup ruang P 63 m c dan model kedudukan Wycoff :2a) dan BCC (grup ruang I m 3 m dan model kedudukan Wycoff : 48j) serta sedikit FCC (grup ruang F -43 m dan model kedudukan Wycoff :4a). Pada suhu awal transisi 420K, diperoleh fraksi massa fasa β : α : γ adalah 79,51 % : 5,69% : 14,80 %. Pada suhu puncak transisi 428K, didapatkan fraksi massa fasa β : α : γ adalah 68,11% : 20,37% : 11,52%. Pada suhu mendekati akhir transisi fasa 433K, menghasilkan fraksi massa fasa β : α : γ adalah 43,77 % : 53,93% : 2,30%. Pada suhu akhir transisi fasa 439K, diperoleh kandungan fraksi massa fasa β : α : γ adalah 6,21 % : 93,46% : 0,33%. Berdasarkan hasil pengukuran DSC, puncak suhu transisi fasa diperoleh pada 155℃ atau 428K yang berkaitan dengan transisi fasa β ke fasa α. Akan tetapi pada kenyataannya pada suhu 428K, kandungan fraksi massa fasa β dan α masing-masing adalah 68,11% dan 20,37% serta sedikit impuritas fasa γ sebesar 11,53%. Pada Suhu mendekati transisi pada 160℃ atau 433 K, kandungan fraksi massa fasa β dan α masing-masing adalah 43,77% dan 53,93% serta sedikit impuritas fasa γ sebesar 2,30%. Hasil analisis menunjukkan bahwa suhu transisi garam AgI yang diperoleh melalui DSC tidak sama dengan suhu transisi perubahan struktur fasa pada konduktor superionik AgI. Hal ini dibuktikan dengan belum tercapainya perubahan struktur fasa β ke fasa α sebesar 50%, dan hasil DSC dicapai puncak suhu transisi pada suhu 428K ± 1.
A Review on Graphene: Synthesis Methods, Sources, and Applications Kartini, Evvy; Setiadi, Tiffanny Angela; Muhammad Fakhruddin
Journal of Batteries for Renewable Energy and Electric Vehicles Vol. 1 No. 02 (2023): NOVEMBER 2023
Publisher : NBRI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59046/jbrev.v1i02.15

Abstract

The carbon allotrope so-called graphene is gaining popularity in the research and industry sector as it exhibits excellent thermal conductivity, mechanical strength, current density, electron mobility, and surface area. These properties of graphene allow them to be incorporated in many different fields to enhance the features of current materials and to be used for ground-breaking research. This review includes three major categories which discuss several ways to synthesize graphene, its sources, and its application, mainly in the field of battery. As there are many ways to produce graphene, this review would try to evaluate which methods would be best for different applications of graphene to overcome the high production cost of graphene, environmental damages, and low purity of graphene.
Market Study and User Behavior Analysis on Battery Charging Adoption for 2W-EV in Indonesia Mubarok, Moh. Wahyu Syafiul; Darmawan, Yasmin Farhaini; Kartini, Evvy; Drew, Alan J
Journal of Batteries for Renewable Energy and Electric Vehicles Vol. 2 No. 01 (2024): MAY 2024
Publisher : NBRI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59046/jbrev.v2i01.33

Abstract

The rapid expansion of the electric vehicle (EV) market has driven a global shift towards sustainable transportation solutions, with two-wheel electric vehicles (2W-EVs) playing a pivotal role in emerging economies like Indonesia. This study investigates the factors influencing the adoption of 2W-EVs in Indonesia, focusing on user behavior, charging preferences, and market dynamics. A mixed-methods approach was employed, combining quantitative surveys with qualitative interviews to gain a comprehensive understanding of consumer attitudes and preferences. The findings reveal that home charging is the preferred method for the majority of users, primarily due to its convenience and cost-effectiveness. However, significant barriers such as range anxiety, insufficient public charging infrastructure, and high upfront costs are impeding widespread adoption. The study also explores the complex interplay of market dynamics, including the influence of government policies, infrastructure development, and economic conditions on the 2W-EV market in Indonesia. Based on the analysis, this paper offers recommendations to accelerate 2W-EV adoption, including the expansion of charging infrastructure, cost reduction strategies through subsidies and incentives, and increased consumer education. The research concludes that while 2W-EVs have the potential to significantly contribute to Indonesia's sustainable transportation goals, achieving widespread adoption will require coordinated efforts across multiple sectors.
The National Battery Research Institute: Energizing Indonesia’s Battery Revolution on Skills Development Mubarok, Moh. Wahyu Syafi'ul; Yogandini, Rosi; Kartini, Evvy; Drew, Alan J
Journal of Batteries for Renewable Energy and Electric Vehicles Vol. 2 No. 01 (2024): MAY 2024
Publisher : NBRI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59046/jbrev.v2i01.34

Abstract

Indonesia is at the forefront of the global electric vehicle (EV) battery industry, driven by its rich nickel reserves and strategic initiatives like the National Battery Research Institute (NBRI). This paper explores NBRI’s pivotal role in enhancing skills development within the EV battery sector, a critical factor for sustaining Indonesia's competitive advantage. The study employs a mixed-methods approach, integrating quantitative data analysis with qualitative insights from industry stakeholders. Findings reveal that targeted skills development programs have significantly contributed to workforce readiness, aligning with global trends in green jobs and sustainable energy. However, the industry faces challenges, including the need for continuous upskilling, technological adoption, and collaboration between academia and industry. Opportunities lie in leveraging Indonesia's resource wealth, government policies, and international partnerships to build a robust talent pipeline. The impact of these initiatives is evident in the growth of a skilled labor force capable of driving innovation and sustainability in battery technology. The paper concludes that NBRI’s efforts are crucial in positioning Indonesia as a leader in the global EV battery market, emphasizing the importance of ongoing investment in education and training to meet the evolving demands of this dynamic industry.
Co-Authors Akhmad Herman Yuwono Anne Zulfia Bambang Priyono Darmawan, Yasmin Farhaini Drew, Alan J Heri Jodi, Heri johansyah johansyah Mario Marfelly, Mario Mubarok, Moh. Wahyu Syafi'ul Mubarok, Moh. Wahyu Syafiul Muhammad Fakhruddin Setiadi, Tiffanny Angela Supandi Suminta Wahid Muhamad Furkon Rahmatulloh, Wahid Muhamad Furkon Yogandini, Rosi