Cu2O-SnO/poly(3,4-ethylenedioxythiophene) nanocomposites with core-shell structures and their electrochemical characteristics

► Cu2O-SnO/PEDOT (CSP) composites form core-shell structures, encapsulating nanoparticles by PEDOT. ► Homo-phase CSP consists of nanosized Cu2O, SnO, and Cu in PEDOT. ► Its morphology leads to high electrical conductivity and electrochemical performance.