Electrodeposited Nanostructured CoFe2O4 for Overall Water Splitting and Supercapacitor Applications

作者：Chun‐yang Zhang, Sanket Bhoyate, Chen Zhao, P.K. Kahol, Nikolaos Kostoglou, Christian Mitterer, Steven J. Hinder, Mark Baker, Georgios Constantinides, Kyriaki Polychronopoulou, Claus Rebholz, Ram K. Gupta · 发表于：Catalysts · 年份：2019 · DOI：10.3390/catal9020176 · 被引用次数：99 · 研究领域：Supercapacitor Materials and Fabrication、Advancements in Battery Materials、Copper-based nanomaterials and applications

To contribute to solving global energy problems, a multifunctional CoFe2O4 spinel was synthesized and used as a catalyst for overall water splitting and as an electrode material for supercapacitors. The ultra-fast one-step electrodeposition of CoFe2O4 over conducting substrates provides an economic pathway to high-performance energy devices. Electrodeposited CoFe2O4 on Ni-foam showed a low overpotential of 270 mV and a Tafel slope of 31 mV/dec. The results indicated a higher conductivity for electrodeposited compared with dip-coated CoFe2O4 with enhanced device performance. Moreover, bending and chronoamperometry studies suggest excellent durability of the catalytic electrode for long-term use. The energy storage behavior of CoFe2O4 showed high specific capacitance of 768 F/g at a current density of 0.5 A/g and maintained about 80% retention after 10,000 cycles. These results demonstrate the competitiveness and multifunctional applicability of the CoFe2O4 spinel to be used for energy generation and storage devices.