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All Journal Journals of Ners Community Jurnal TAMBORA Hexagon
Muhammad Hilmy Alfaruqi
Universitas Teknologi Sumbawa
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Economics, Econometrics & Finance Industrial & Manufacturing Engineering Nursing

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Journal : Hexagon

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STUDI TEORITIS MATERIAL KATODA BATERAI ION LITIUM LiFePO4 BERDASARKAN KALKULASI TEORI FUNGSIONAL KERAPATAN Lalu Suhaimi; Syamsul Bahtiar; Muhammad Hilmy Alfaruqi
Hexagon Jurnal Teknik dan Sains Vol 1 No 2 (2020): HEXAGON - Edisi 2
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (430.27 KB) | DOI: 10.36761/hexagon.v1i2.617

Abstract

To fully utilize the intermittent renewable energy resources, energy storage applications such as lithium-ion batteries (LIBs) become very critical. Among LIBs components, cathode part is very important. LiFePO4 material is among the cathode material which has gained significant attention owing to its environmentally friendly and low-cost features compared to Co- or Ni-based cathodes. In this study, we present a theoretical investigation of LiFePO4 material using density functional theory calculations. We optimized LiFePO4 as well as FePO4 structures. Li ion intercalation potential into the structure was also calculated. In addition, the electronic structure of the material was also studied. The present study may provide an insight for further investigation of cathode materials for LIB applications.
STUDI TEORITIS SIFAT STRUKTUR DAN ELEKTRONIK MATERIAL TITANIUM DIOKSIDA DENGAN KALKULASI TEORI FUNGSIONAL KERAPATAN Muhammad Hilmy Alfaruqi
Hexagon Jurnal Teknik dan Sains Vol 2 No 1 (2021): HEXAGON - Edisi 3
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (626.09 KB) | DOI: 10.36761/hexagon.v2i1.876

Abstract

Titanium dioksida (TiO2) merupakan material penting yang dapat ditemukan di berbagai macam aplikasi. Di samping itu, keunikan TiO2 terletak pada kristal strukturnya yang sangat beragam seperti anatase, rutile, dan brookite. Pada penelitian ini, kami menyajikan hasil kajian teoritis sifat struktur dan elektronik material TiO2 anatase dan brookite menggunakan kalkulasi teori fungsional kerapatan. Simulasi pola difraksi sinar-X dari dua struktur tersebut juga diamati dan dibahas. Untuk sifat elektronik, kami melakukan kalkulasi selain tanpa memasukkan koreksi Hubbad penambahan koreksi Hubbard dengan berbagai nilai juga dilakukan. Penambahan koreksi Hubbard sangat berpengaruh pada nilai dari energi celah pita. Namun secara umum, hasil perhitungan menunjukkan TiO2 memiliki karakteristik semikonduktor. Studi ini dapat dijadikan bahan rujukan yang dapat digunakan untuk melakukan desain material khususnya TiO2 dan oksida lainnya.
Co-Authors Apriyatiningsih Linda Mayasari1 Mayasari Martadinata, Sudrajat Syamsul Bahtiar Yossy Dwi Erliana