“…Because of their unique properties such as high theoretical capacity, low cost, chemical stability, and natural abundance, various metal oxide electrode materials have emerged as promising candidates in the future generation of LIBs and SCs, such as SnO 2 , [6,7] Co 3 O 4 , [8,9] Mn 3 O 4 , [10,11] Fe 3 O 4 , [12,13] and CuO. [14,15] Among metal oxides, CuO with its high theoretical capacity of 670 mA h g À1 is therefore one of the most promising potential anodes to replace conventional graphite anode materials (372 mA h g…”