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Pengaruh Penambahan Oxalic Acid pada Sintesis LiNi0.8Mn0.1Co0.1O2 dengan Metode Solid State Reaction untuk Aplikasi Katoda Lithium-Ion Battery
ABSTRAK
Penelitian bahan katoda menggunakan LNMC(Lithium Nickel Manganese Cobalt) telah banyak dilakukan karena beberapa keunggulan bahan LNMC seperti ketersediaan bahan yang melimpah, serta dapat meningkatkan kapasitas dan performa baterai. Berbagai macam metode sintesis telah digunakan dalam menghasilkan LNMC, seperti metode co-precipitation, metode sol-gel, dan metode solid state. Sintesis pada penelitian ini menggunakan metode solid state dikarenakan metode solid state memiliki kelebihan diantaranya proses yang sederhana,biaya rendah, kontrol yang mudah, dan sangat cocok untuk produksi industri. Penambahan chelating agent pada metode solid state reaction mampu memperbaiki performa elektrokimia dari LIB. Penelitian ini telah berhasil membuat bahan Li1Ni0.8Mn0.1Co0.1O2 (LNMC 811) menggunakan metode solid state reaction dengan penambahan Oxalic Acid sebagai chelating agent untuk katoda pada LIB. Berdasarkan pengujian X-ray diffraction(XRD) diperoleh ukuran kristal tertinggi pada LNMC-OA 75 yaitu sebesar 46,3 nm. Citra SEM menunjukkan penambahan oxalic acid mengakibatkan semakin mudah bahan beraglomerasi. Performa elektrokimia dari bahan LNMC ditunjukkan dari uji charge-discharge dan diperoleh kapasitas charge tertinggi LNMC-OA 25 yaitu 22,4 mAh/g dan kapasitas discharge tertinggi pada LNC-OA 75 dengan kapasitas 0,75 mAh/g, sedangkan untuk stabilitas siklus charge-discharge terbaik pada LNMC-OA 75 pada 3 mAh/g dan cenderung stabil.
Kata kunci: chelating agent, Li-ion Battery, LNMC, Katoda, solid state reaction
ABSTRACT
Research on cathode materials using LNMC(Lithium Nickel Manganese Cobalt) has been carried out because of the advantages of LNMC materials such as abundant availability of materials, and can increase battery capacity and performance. Various types of synthesis methods have been used in producing LNMC, such as a co-precipitation method, sol-gel method, and solid state method. The synthesis in this study uses solid state methods because solid state methods have advantages such as simple processes, low cost, easy control, and are very suitable for industrial production. Adding chelating agent to the solid state reaction method can improve the electrochemical performance of the LIB. This research has succeeded making Li1Ni0.8Mn0.1Co0.1O2 (LNMC 811) with a solid state reaction method by adding Oxalic Acid as a chelating agent to the cathode in LIB. Based on X-ray diffraction (XRD) testing, the highest crystal size was obtained at LNMC-OA 75 which was 46,3 nm. SEM images show the addition of oxalic acid resulting in easier agglomeration of materials. The electrochemical performance of LNMC material is shown from the charge-discharge test and the highest charge capacity of LNMC-OA 25 is 22,4 mAh/g and the highest discharge capacity is at LNC-OA 75 with a capacity of 0,75 mAh/g, while for the best cycle stability charge-discharge at LNMC-OA 75 at 3 mAh/g and tends to be stable.
Keys word: chelating agent, cathode, Li-ion battery , LNMC, solid state reaction
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