One-step architecture of bifunctional petal-like oxygen-deficient NiAl-LDHs nanosheets for high-performance hybrid supercapacitors and urea oxidation

Nickel-based layered double hydroxides (LDHs) are promising electrode materials in the fields of energy storage (supercapacitors) and conversion (urea oxidation). The rational construction atomic electronic structure is crucial for nickel-based LDHs to realize their satisfactory electrochemical performance. Herein, we report a facile, ecofriendly, one-step synthesis process construct petal-like oxygen-deficient NiAl-LDH nanosheets hybrid super-capacitors (HSCs) urea oxidation reaction (UOR). asprepared NiAl?LDH with rich oxygen vacancies possess large specific surface area 216.6 m2 g?1 desirable conductivity 3.45 × 10?4 S cm?1 deliver an ultra-high capacitance 2801 F (700 C g?1) at 1 A g?1. Furthermore, high 50.0 W h kg?1 400 excellent cycle stability 91% retention after 10,000 cycles achieved by NiAl-LDHs/CFP (carbon fiber paper) (+)//YP-80F (a commercial activated carbon) (?) HSC. Besides, also work as efficient electrocatalyst UOR, which only requires 1.42 V vs. reversible hydrogen drive 10 mA cm?2 mol L?1 KOH 0.33 urea. This remarkable performance superior most reported values previous candidates owing thin exposing more active sites abundant vacancies. In addition, various parameters investigated optimize general, this paves new way architecture multifunctional nanostructured materials.