Pengaruh Variasi Waktu Milling terhadap Karakter Produk Sintesis LiMn2O4 dengan Reaksi Padat-Padat

Ega Sharfina; Rahmad Nuryanto; Teguh Yulius Surya Panca Putra

doi:10.14710/jksa.18.1.7-12

DOI: https://doi.org/10.14710/jksa.18.1.7-12

Pengaruh Variasi Waktu Milling terhadap Karakter Produk Sintesis LiMn2O4 dengan Reaksi Padat-Padat

Ega Sharfina¹, Rahmad Nuryanto¹

, Teguh Yulius Surya Panca Putra²

¹Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia

²Center for Science and Technology of Advanced Materials, Indonesia National Nuclear Energy Agency, Indonesia

Published: 1 Apr 2015.

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Abstract

Sintesis katoda LiMn₂O₄ dari bahan dasar Li₂CO₃ dan MnO₂ melalui metode reaksi padat-padat dengan pemanasan suhu tinggi telah dilakukan. Pencampuran serbuk menggunakan proses pemaduan mekanik dengan memberikan variasi waktu milling 0, 2, 4, 6, dan 8 jam. Tahapan penelitian meliputi pencampuran bahan Li₂CO₃ dan MnO₂ menggunakan High Energy Milling (HEM), sintering pada temperatur 850°C selama 6 jam, dan karakterisasi menggunakan XRD, SEM-EDS dan LCR meter. Prinsip alat HEM adalah pemanfaatan tumbukan antara bola-bola penghancur. Dinding wadahnya diputar dan digerakkan dengan cara tertentu untuk mendapatkan hasil reaksi dengan tingkat homogenitas yang tinggi dan meningkatkan keseragaman ukuran partikel. Hasil analisis XRD menunjukkan bahwa penambahan waktu milling berpengaruh terhadap pelebaran puncak difraksi Li₂CO₃ dan MnO₂ yang mengarah ke pembentukan fasa baru membentuk kristal LiMn₂O₄ yang ditandai dengan difraktogram yang tampak semakin amorf. Paduan LiMn₂O₄ terbentuk setelah serbuk hasil milling dipanaskan pada temperatur 850°C. Uji konduktivitas mencatat bahwa pada waktu milling 8 jam diperoleh nilai konduktivitas tertinggi, yaitu sebesar 1,32 x 10^-4 Scm-1.

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Keywords: katoda LiMn2O4; High Energy Milling (HEM); konduktivitas

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Section: Research Articles

Language : ID

In Vol 18, No 1 (2015): Volume 18 Issue 1 Year 2015

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