Analisis Pengaruh Massa Reduktor Zinc Terhadap Sifat Kapasitif Superkapasitor Material Graphene
Submission Date: 2015-01-30 15:40:15
Accepted Date: 2015-03-13 00:00:00
Abstract
Material graphene merupakan material inovatif yang memiliki kristal berupa lapisan dua dimensi. Kristal 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 elektroda pada kapasitor elektrokimia karena alat tersebut bekerja berdasarkan luas permukaan untuk proses charging-discharging. Penelitian ini bertujuan untuk menganalisis komposisi massa reduktor zinc agar didapat graphene dengan kapasitansi listrik terbaik. Grafit dioksidasi menjadi grafit oksida melalui metode Hummer. Grafit oksida yang diperoleh dilarutkan dalam aquades dan diultrasonikasi selama 90 menit sehingga diperoleh graphene oksida (GO). GO kemudian direduksi dengan menambahkan Zinc (Zn) sebanyak 0,8 gram, 1,6 gram, dan 2,4 gram. Proses selanjutnya hydrothermal selama 12 jam pada temperatur 160 oC. X-Ray Diffraction (XRD) untuk mengetahui perbandingan jarak antar layer dan kristalinasi grafit, graphene oksida dan graphene. Scanning Electron Microscope (SEM) untuk menganalisis morfologi graphene. Four Point Probe (FPP) untuk mengukur konduktivitas listrik graphene, dan Cyclic Voltametry (CV) untuk mengukur kapasitansi elektroda nickel foam-graphene
Keywords
Grafit; Grafit oksida; Graphene oksida; Graphene; Metode hydrothermal; Metode Hummer
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