Polyelectrolyte Self-assembled Modified Ceramic Membrane and its Application in Lithium-Sulfur Batteries

摘要

This work describes a novel strategy to synthesize polypyrrole-coated NiO/a-Ni(OH)2 hybrid flowerwith an improved capacitance performance for supercapacitor. Polypyrrole nanoparticles with a size of80-100 nm were prepared by a pulse electro-polymerization and uniformly embedded into the petal gapof the self-assembled NiO/a-Ni(OH)2 hybrid flower. Due to the enhancement of the electricalconductivity and the improvement of electrochemical pseudo-capacitance, the as-synthesizedpolypyrrole-coated NiO/a-Ni(OH)2 hybrid flower composite showed a high reversible specific capacityof 359 F g-1at 5 A g-1in 2 M KOH electrolyte in a potential range of 0 - 0.45 V. Benefiting from theunique electro-polymerization design, the obtained hybrid flower composite demonstrated excellentcapacitive performance and cycling stability after 1000 cycles, demonstrating the promising applicationas a high-performance pseudocapacitive material for supercapacitors.