1 research outputs found
Nanosheet-Assembled NiO Microstructures for High-Performance Supercapacitors
Nanosheet-assembled NiO microstructures
have been synthesized via
a hydrothermal method. The presence of anionic surfactant in the fabrication
process initiates the formation of lamellar micelles and a self-assembling
process. This leads to the formation of NiO nanosheets and organizes
it into microstructures. The effect of preparation temperature on
the morphological, structural, and electrochemical properties and
stability upon continuous charge/discharge cycles has been examined
for supercapacitor applications. Electrochemical analysis demonstrated
that NiO nanosheets prepared at 160 °C are capable of delivering
a specific capacitance of 989 F g<sup>–1</sup> at a scan rate
of 3 mV s<sup>–1</sup> for the potential window of 0–0.6
V. The nanosheets exhibit excellent capacity retention, 97% retention
after 1000 continuous charge/discharge cycles, and an energy density
of 49.45 W h kg<sup>–1</sup>