Lignin Nanofiber Termodifikasi Oksida Logam Non-Mulia untuk Aplikasi Pada Baterai Logam – Udara

Sasono, Sella Ramadhani Alya (2023) Lignin Nanofiber Termodifikasi Oksida Logam Non-Mulia untuk Aplikasi Pada Baterai Logam – Udara. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Nanofiber berbasis lignin dengan metode electrospinning yang dikompositkan dengan oksida logam non-mulia (MnO2 dan Fe3O4) disintesis untuk aplikasi elektrokatalis. Nanofiber berbasis lignin diproduksi dari Sodium lignosulfonat (SLS) melalui electrospinning, menggunakan Polyvinyl alcohol (PVA) sebagai polimer yang dilanjutkan dengan proses stabilisasi dengan perlakuan iodin. Proses komposit diamati dengan memasukkan KMnO4 dan FeCl3.6H2O yang diikuti dengan proses hidrotermal, dan dibandingkan metode komposit antara sebelum dan sesudah proses electrospinning. Analisa morfologi mengkonfirmasi bahwa nanofiber yang dikompositkan sesudah electrospinning (post- electrospinning) menunjukkan morfologi serat yang tidak diinginkan. Selain itu, difraksi sinar-X menunjukkan bahwa sampel yang dikompositkan dengan oksida logam non-mulia (MnO2 dan Fe3O4) baik sebelum atau sesudah electrospinning (pre- dan post- electrospinning) memiliki fase amorf yang sama. Nanofiber lignin yang dikompositkan dengan MnO2 memiliki sifat elektrokimia yang lebih baik dengan densitas arus 0,65 mA/cm2 dan pada beda potensial 0,48 (vs. Ag/AgCl). Oleh karena itu, saat dilakukan pengujian baterai dengan Aluminum (Al) sebagai anoda, menunjukkan kapasitas 143,85 mAh/g, potensial sel 0,35 V, dan bertahan selama 1553,25 menit.
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Lignin-based nanofibers by electrospinning method composited with non-noble metal oxides (MnO2 and Fe3O4) were synthesized for electrocatalyst applications. Lignin-based nanofibers were produced from Sodium lignosulfonate (SLS) via electrospinning, using Polyvinyl alcohol (PVA) as polymer followed by stabilization process with iodine treatment. The composite process was observed by introducing KMnO4 and FeCl3.6H2O followed by a hydrothermal process, and the composite method was compared between before and after the electrospinning process. Morphological analysis confirmed that the nanofiber composite after electrospinning showed undesirable fiber morphology. In addition, X-ray diffraction showed that the samples composited with non-noble metal oxides (MnO2 and Fe3O4) either before or after electrospinning (pre- and post- electrospinning) had the same amorphous phase. Lignin nanofiber composited with MnO2 has better electrochemical properties with a current density of 0.65 mA/cm2 and at a potential difference of 0.48 (vs. Ag/AgCl). Furthermore, during battery testing with Aluminum (Al) as the anode, it showed a capacity of 143.85 mAh/g, a cell potential of 0.35 V, and lasted for 1553.25 minutes.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Baterai logam-udara, lignin, magnetite (Fe3O4), mangan dioksida (MnO2), nanofiber Metal-air batteries, lignin, magnetite (Fe3O4), manganese dioxide (MnO2), nanofiber
Subjects: T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles.
T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial.
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Chemical Engineering > 24101-(S2) Master Thesis
Depositing User: Sella Ramadhani Alya Sasono
Date Deposited: 07 Aug 2023 07:55
Last Modified: 07 Aug 2023 07:55
URI: http://repository.its.ac.id/id/eprint/103448

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