Analisa pengaruh massa reduktor zinc terhadap sifat kapasitif superkapasitor material graphene

Suwandana, Rahman Faiz (2015) Analisa pengaruh massa reduktor zinc terhadap sifat kapasitif superkapasitor material graphene. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Material graphene merupakan material inovatif yang memiliki kristal berupa lapisan dua dimensi yang terdiri dari hibridisasi sp2 atom karbon dan membentuk struktur heksagonal serta memiliki luas permukaan spesifik sangat tinggi, mencapai 1500 m2/gram. Dengan luas permukaan tersebut, graphene sangat cocok digunakan sebagai bahan pada kapasitor elektrokimia yang bekerja berdasarkan luas permukaan untuk proses charging-discharging. Penelitian ini bertujuan untuk menganalisis komposisi massa reduktor zinc yang paling sesuai agar didapatkan sifat graphene paling baik untuk kemudian diaplikasikan sebagai sebuah elektroda superkapasitor. Dalam penelitian ini akan digunakan metode Hummer untuk mensintesa grafit oksida yang diperoleh dilarutkan dalam aquades dan diultrasonikasi sehingga diperoleh graphene oksida (GO). GO kemudian direduksi secara kimia dengan variasi penambahan serbuk Zn sebanyak 0,8 gram, 1,6 gram, dan 2,4 gram. Selanjutnya GO direduksi secara termal melalui proses hydrothermal. Graphene yang telah disintesis kemudian dilarutkan dalam aquades untuk dideposit pada sebuah elektroda nickel foam. Dari pengujian four point probe dan cyclic voltametry, graphene dengan massa zinc 0,8 gram memiliki sifat terbaik dengan konduktifitas sebesar 2,906 S/cm dan kapasitansi 90,623 F/gram.

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Graphene is an inovative material which has a single layer two dimension that consist carbon atom hybridisized sp2 form hexagonal structure. It also has a specific surface area reaches 1500 m2/gram. Furthermore, graphene is very suitable to be used as an electrochemical capacitor that work based on specific surface area to charge-discharge process. The purpose of this research are to get the optimum mass of reductor zinc for graphene synthesized for supercapacitor applications. In this research, graphite oxidized to graphite oxide by Hummer method and dissolved in DI water to obtain graphene oxide (GO) by ultrasonication process. Then GO chemically reduced with 0.8 g, 1.6 g, 2.4 g Zn powder added. GO thermally reduced with hydrothermal process. Synthesized graphene be dissolved in DI. To make an electrode, a piece of nickel foam be immersed in graphene solution then be dried off. Based on four point probe test and cyclic voltametry test, graphene with 0,8 gr zinc mass has the best properties. Its electrical conductivity is 2,906 S/cm and its electrical capacitance is 90,623 F/gram.

Item Type: Thesis (Undergraduate)
Additional Information: RSMt 620.118 Suw a
Uncontrolled Keywords: Graphene; Metode hydrothermal; Metode Hummer; Superkapasitor graphene
Subjects: T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL240.5 Composite materials
Divisions: Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User: - Taufiq Rahmanu
Date Deposited: 24 Oct 2018 03:10
Last Modified: 24 Oct 2018 03:10
URI: http://repository.its.ac.id/id/eprint/59912

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