Pengaruh Doping Nikel terhadap Sifat Termoelektrik Material CoSb3 melalui Metode Vacuum Sealing System

Halimatus - Sa'diyah, Chusnana Insjaf Yogihati, Nasikhudin - -, Herlin - Pujiarti, Yulia Nining Rahayu, Markus - Diantoro

Abstract


Material termoelektrik mampu mengubah energi panas menjadi energi listrik secara langsung, dan CoSb3 merupakan kandidat potensial pada suhu menengah. Penelitian ini mensintesis material Co1-xNixSb3 (x = 0; 0.05; 0.10; 0.15; dan 0.20M) menggunakan metode vacuum sealing System dan mengkaji pengaruh doping Ni terhadap struktur kristal, morfologi, serta sifat termoelektriknya. Hasil XRD menunjukkan bahwa semua sampel memiliki fase utama CoSb3 (Im3), dengan fase sekunder Sb dan NiSb2 serta ukuran kristal berkisar . Doping Ni menyebabkan pergeseran puncak ke sudut Bragg lebih kecil, menandakan substitusi Ni pada posisi Co. Hasil SEM-EDS menunjukkan morfologi butiran bulat ( dan distribusi unsur yang merata. Konduktivitas listrik berada pada berkisar  pada suhu ruang, dengan koefisien Seebeck CoSb3 berkisar  dan   sampai  dengan untuk sampel yang didoping Ni. Nilai power factor optimum dipeoleh pada Co0.90Ni0.10Sb3 sebesar  pada suhu  Material CoSb3 doping Ni berpotensi untuk dikembangkan menjadi thin film termoelektrik sebagai dasar pembuatan prototipe perangkat pemanen energi panas.

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DOI: https://doi.org/10.17509/wafi.v10i2.92106

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