Synthesis of bimetallic nickel cobalt selenide particles for high-performance hybrid supercapacitors

The litchi-like Ni–Co selenide constructed Ni0.95Co2.05Se4//AC hybrid supercapacitor achieves an energy density of 37.22 W h kg−1 and a power density of 800.90 W kg−1. The ASC device can retain 95.21% of the original capacity after 4000 cycles.

Properties Study of SILAR Deposited Cobalt Selenide Thin Films

Thin films are attractive materials to be used in laser, solar cells, sensors, phosphors, light emitting diodes, IR windows and flat panel displays. Several deposition methods have been employed to deposit thin films as reported by many researchers. In this report, the cobalt selenide thin films have been deposited onto microscope glass slide via successive ionic layer adsorption and reaction method. This deposition method is a simple method owing to the inexpensive technique and can produce films at a low bath temperature. All the samples were investigated by using XRD, FESEM and UV-visible spectrophotometer. The XRD pattern confirmed that cubic phase cobalt selenide thin films. The FESEM image exhibited that the obtained sample is dense, uniform, and smooth surface. Keywords: XRD, FESEM, Thin films, Cobalt selenide, SILAR technique, Semiconductor, Band gap.