Arazi, Ikbal and Putra, Ananda Preparation and Characterization Composites of Activated Carbon From Cassava Peel (Manihot Utilissima) – Copper (II) Oxide (CuO) as a Thermoelectric Material. International Journal of Research and Review (IJRR), 7 (9). pp. 42-51. ISSN Print: 2349-9788 dan Online: 2454-2237