“…Since green chemistry has become a hot topic worldwide, a large number of biomass materials, such as rice husks, shaddock peels, and diatoms, have been widely utilized as electrode materials for supercapacitors , and rechargeable batteries. , Commonly, biomass wastes function as templates, carbon sources or silicon sources. , However, only a few reports are relevant to biomass wastes acting as the reducing reagents. In our previous work, we reported the facile synthesis of Cu superstructures via hydrothermal reduction with natural leaves, and the derived Cu–MnO 2 and Cu–Co 3 O 4 hybrids showed superiority for electrochemical energy storage.…”