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Explores hybrid supercapacitors using heterostructured electrodes, showing promising energy storage in these materials.
The hollow structure of transition metal selenides can significantly boost the energy storage capability thanks to their attractive two-dimensional nanostructure and large exposed surface area. In this study, the heterostructured NiSe2/MoSe2/NF microspheres with cavity structure were obtained via a hydrothermal selenization process. The duration of the selenization process significantly affected both the electrode materials’ morphology and capacity properties. Electrochemical testing conveyed that the NiMoSe-6 microspheres (NiSe2/MoSe2) treated with selenium for 6 h were the best, measuring 275 mAh g–1 at 1 A g–1. In addition, the NiSe2/MoSe2//AC device presented an impressive specific energy density of 53.7 Wh kg–1 at a density of 749.9 W kg–1. Furthermore, the two homemade pieces of the NiSe2/MoSe2//AC device in series (2 × 2 cm2) successfully powered multicolored LED lights or an electronic timer. The strategy of enhancing performance by regulating selenization time serves as a valuable guideline for designing advanced transition metal selenides.
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Wang et al. (2026) studied this question.
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