1Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia
2Center for Science and Technology of Advanced Materials, Indonesia National Nuclear Energy Agency, Indonesia
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@article{JKSA18416, author = {Ega Sharfina and Rahmad Nuryanto and Teguh Putra}, title = {Pengaruh Variasi Waktu Milling terhadap Karakter Produk Sintesis LiMn2O4 dengan Reaksi Padat-Padat}, journal = {Jurnal Kimia Sains dan Aplikasi}, volume = {18}, number = {1}, year = {2015}, keywords = {katoda LiMn2O4; High Energy Milling (HEM); konduktivitas}, abstract = {Sintesis katoda LiMn 2 O 4 dari bahan dasar Li 2 CO 3 dan MnO 2 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 Li 2 CO 3 dan MnO 2 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 Li 2 CO 3 dan MnO 2 yang mengarah ke pembentukan fasa baru membentuk kristal LiMn 2 O 4 yang ditandai dengan difraktogram yang tampak semakin amorf. Paduan LiMn 2 O 4 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.}, issn = {2597-9914}, pages = {7--12} doi = {10.14710/jksa.18.1.7-12}, url = {https://ejournal.undip.ac.id/index.php/ksa/article/view/18416} }
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