Nanowired NiMoO4/NiSe2/MoSe2 prepared through in situ selenylation as a high performance supercapacitor electrode

After in situ selenylation, hydrothermally synthesized NiMoO4 was partially converted to NiSe2 and MoSe2, and the obtained NiMoO4/NiSe2/MoSe2 nanowires were used as a supercapacitor electrode material. The specific capacitance of the nanowired NiMoO4/NiSe2/MoSe2 was significantly higher than that of NiMoO4 at a current density of 1 A g(-1) (955 vs. 489 F g(-1)). NiMoO4/NiSe2/MoSe2 also exhibited a high capacitance retention of 86.1% after 5000 cycles at 10 A g(-1). The high supercapacitive performance of NiMoO4/NiSe2/MoSe2 can be ascribed to the obvious heterointerfaces, rich defects and remarkably increased electrical conductivity after in situ selenylation of NiMoO4.

Automated summary

After in situ selenylation, NiMoO4 was partially converted to NiSe2 and MoSe2, resulting in NiMoO4/NiSe2/MoSe2 nanowires with significantly higher specific capacitance and retention rate. The superior supercapacitive performance can be attributed to the heterointerfaces, defects, and increased electrical conductivity after selenylation of NiMoO4.