Enhanced solid-state reaction synthesis of CdO, SnO, and CdO0·2/SnO0.2 hetero-junction electrode for high-performance energy storage

Abstract

This study unveils a superior method for energy storage synthesis, employing CdO, SnO, and CdO_0·2/SnO_0.2 hetero-junction electrodes through enhanced solid-state reaction. The CdO and SnO electrodes with a specific capacitance of 266.66, 191.66, 166.66 ​F/g and 138.88, 122.22, and 115.07 ​F/g. The CdO_0·2/SnO_0.2 hetero-junction nanoparticles with a specific capacitance of 370.37, 222.22, 158.73 ​F/g. The charge storage capacity of CdO_0·2/SnO_0.2 hetero-junction nanoparticle electrodes is outstanding, making them highly beneficial for energy storage and supercapacitor applications. The XRD patterns obtained from the synthesized CdO_0·2/SnO_0.2 hetero-junction nanoparticles exhibit distinct diffraction peaks, showing a cubic crystal structure. These diffraction peaks, at 2θ values of 27.111°, 34.189°, 38.682°, 52.635°, 55.793^o, 62.779^o, 66.676^o, and 79.496° can be attributed to the (111), (200), (211), (212), (220), (300), (22), and (311) diffraction planes of CdO_0·2/SnO_0.2 hetero-junction nanoparticles. The observation of a grain-like shape in the CdO_0·2/SnO_0.2 hetero-junction nanoparticles structure is attributed to CdO, which serves as a confirmation of the formation of a hetero-junction. The energy bandgap of CdO, SnO, and CdO_0·2/SnO_0.2 hetero-junction nanoparticles material are 2.50, 3.50, and 3.35 ​eV respectively.