MOF-Derived Ni5P4 Nanoparticles Based on the Microemulsion Strategy for Supercapacitors and Water Splitting

With the rapid advancement of energy storage and conversion systems (ESCSs), renewable energy can achieve a smooth and continuous output capacity. Nevertheless, commercial precious metal-based multifunctional ESCSs materials are plagued by issues like scarcity and high production costs. This study adopted microemulsion and chemical vapor deposition (CVD) strategies to fabricate single crystal Ni5P4 nanoparticles successfully. Due to its excellent crystal integrity and high electrical conductivity, single crystal Ni5P4 offers abundant active sites for redox reactions. Additionally, it allows electrons and ions to move more efficiently and freely, making it a highly promising multifunctional material for ESCSs. For supercapacitors (SCs), the prepared Ni5P4-10 electrode possesses a battery-like behavior with a high specific capacity of 1643.13 F g–1@0.5 A g–1. The corresponding assembled Ni5P4-10//AC hybrid SCs (HSCs) exhibit a maximum energy density of 37.78 Wh kg–1 at a power density of 400 W kg–1. Furthermore, Ni5P4-10 displays low overpotentials of 150 mV@HER and 250 mV@OER at 10 mA cm–2 when it serves as an electrocatalyst. This study offers a novel perspective for the design of MOF-derived multifunctional ESCSs materials.