Biomass-derived carbon combined with scalable NiZnP nanosheets building superior structurization electrode towards high-performance supercapacitors

The hierarchical NiZn phosphides nanosheets matched with porous carbon by structural engineering become pivotal to reduce cost and enhance charges storage capability, yet remain a challenge for the adjustable generation for ion-facilitated transportation. Herein, we report the hybrid material of red-date based N, S doping carbon and NiZn metal phosphide significantly undergone morphological evolution with the assistance of carbon additive. The surface NiZnP nanosheets have significantly dispersed by bonding with metal ions and S heteroatom of the eligible carbon, inducing extremely transfer band in hybrid interface and uniquely endowing petal-like nanostructure. Due to the scalable nanostructure and the merits including bringing intercalation, regulating electronic state, and promoting electroactive transport, the optimized hybrid electrode displays outstanding specific capacitance of 1215.6 F g −1 at 0.5 A g −1 and high-rate property. The constructed ASCs exhibit superior electrochemical properties, e.g., enhanced energy density, extended voltage range and considerable cycling stability, which is obviously superior to the devices based on single NiZnP or AC negative electrode. The work provides new perspective for the exploration of regulating hybrid carbon/metal phosphide materials and application in enhanced-performance energy storage devices.