Enabling redox chemistry with hierarchically designed bilayered nanoarchitectures for pouch-type hybrid supercapacitors: A sunlight-driven rechargeable energy storage system to portable electronics

摘要: Abstract An essential key to enhance the redox chemistry of battery-type materials is construct rational design nanoarchitectures with high electrochemical activity. Herein, we reported a hierarchical composite consisting bilayered nickel hydroxide carbonate nanoplates-decorated nanoflowers on foam (NHC NPs@NFs/Ni foam) via facile homogeneous precipitation method for use as an effective cathode in hybrid supercapacitors (HSCs). Under controlled growth time (4 h), NHC NPs@NFs alignment were spontaneously crystallized Ni foam. The as-preapared structure greatly enhanced electroactive surface area and enabled rapid alkaline electrolyte. Notably, delivered maximum areal capacity 727.4 μAh/cm2 at 2 mA/cm2 it relatively higher than its oxide form (76.6 μAh/cm2) three-electrode system. Also, pouch-type HSC porous carbon electrodes was fabricated, which demonstrated superior energy storage performance terms capacitance (1445.8 mF/cm2), density (0.506 mWh/cm2), power (35.675 mW/cm2) cycling stability (89.4%). Furthermore, self-charging station solar cell conversion HSCs also assembled operate portable electronic displays wall clock effectively long time. This approach cost-effective fabrication hierarchically designed nanomaterials paves path development high-performance supercapacitors.