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

The litchi-like Ni–Co selenide constructed Ni 0.95 Co 2.05 Se 4 //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.