Analisis Pengaruh Variasi Temperatur Pirolisis Nitrogen Doped Carbon Layer Pada Katoda Litium Nikel Mangan Aluminium (LiNi0,9Mn0,07Al0,03O2) Terhadap Morfologi, Struktur, Dan Performa Elektrokimia Baterai Ion Litium

Hanifan, Rama Akbar (2025) Analisis Pengaruh Variasi Temperatur Pirolisis Nitrogen Doped Carbon Layer Pada Katoda Litium Nikel Mangan Aluminium (LiNi0,9Mn0,07Al0,03O2) Terhadap Morfologi, Struktur, Dan Performa Elektrokimia Baterai Ion Litium. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Baterai Ion Lithium adalah komponen sel elektrokimia yang dapat menyimpan energi listrik pada material aktif katoda dengan prinsip reduksi dan oksidasi. Katoda Nikel Mangan Aluminum (NMA) memiliki sifat elektrokimia dan Li/Ni Mixing yang lebih superior dibandingkan katoda komersil NMC namun dengan Specific Capacity yang lebih rendah. Dilakukan sintesis katoda sintesis katoda LiNi0,9Mn0,07Al0,03O2 (Li-NMA) dengan metode kopresipitasi dengan kontrol pH 10,67 dan 11,45. Katoda kemudian diberi perlakuan carbon coating sucrose 10wt% dan tripolycyanamide 2.25wt% dan dengan variasi temperatur pirolisis 650℃, 700℃, dan 750℃. Sintesis dilakukan dengan kopresipitasi pada larutan ion logam hidroksida dengan amonia lalu dikalsinasi pada temperatur 800oC selama 12 jam dengan atmosfer oksigen lalu dilakukan pirolisis dengan atmosfer argon selama 6 jam. Didapati bahwa katoda yang terbentuk memiliki struktur LiNiO2 rhombohedralR3m dengan struktur rock salt α-NaFeO. Doping aluminum dan mangan dikonfirmasi dengan SEM EDX. Morfologi menunjukkan bentuk heksagonal dengan sebagian besar ukuran pada 100-150 nm dengan ukuran partikel setelah carbon coating lebih kecil dibandingkan sebelum carbon coating. Ukuran kristal katoda dengan kontrol pH 10,67 secara umum lebih besar dibandingkan pH 11,45. Sukrosa dan Melamin masing masing merusak struktur katoda sehingga performa elektrokimia material dengan carbon coating menurun drastis ditandai dengan kemampuan retensi kapasitas GCD yang sangat buruk dan resistansi charge transfer yang meningkat. Proses carbon coating dengan metode wet mixing merusak struktur karena katoda layered berbasis nikel sensitif terhadap kelembaban terutama pada temperatur tinggi.
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Lithium-ion batteries are electrochemical cell components that can store electrical energy in the active material of the cathode through the principle of reduction and oxidation. Nickel Manganese Aluminum (NMA) cathodes have superior electrochemical properties and Li/Ni mixing compared to commercial NMC cathodes but with lower specific capacity. A synthesis of LiNi0,9Mn0,07Al0,03O2 (Li-NMA) cathodes was carried out using the co-precipitation method with pH control at 10.67 and 11.45. The cathodes were then treated with a carbon coating using 10 wt% sucrose and 2.25 wt% tripolycyanamide, with pyrolysis temperature variations of 650℃, 700℃, and 750℃. The synthesis involved co-precipitation in a metal hydroxide ion solution with ammonia, followed by calcination at 800℃ for 12 hours in an oxygen atmosphere and pyrolysis in an argon atmosphere for 6 hours. It was found that the resulting cathode had a LiNiO2 rhombohedralR3m structure with an α-NaFeO rock salt structure. Aluminum and manganese doping was confirmed using SEM EDX. The morphology showed a hexagonal shape with most sizes ranging from 100-150 nm, with particle sizes after carbon coating being smaller than before carbon coating. The crystal size of the cathode with pH control at 10.67 was generally larger than that at pH 11.45. Sucrose and melamine each damaged the cathode structure, resulting in a drastic decline in the electrochemical performance of the material with carbon coating, as indicated by very poor GCD capacity retention and increased charge transfer resistance. The carbon coating process using the wet mixing method damaged the structure because nickel-based layered cathodes are sensitive to moisture, especially at high temperatures.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Baterai, Carbon Layer, Katoda Battery, Carbon Layer, Cathode
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2921 Lithium cells. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2941 Storage batteries
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Rama Akbar Hanifan
Date Deposited:	23 Jan 2025 06:36
Last Modified:	23 Jan 2025 06:36
URI:	http://repository.its.ac.id/id/eprint/116734

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