Abstract
The inferior conductivity and structural durability are key issues in engineering suitable metal oxide-based hybrid electrodes for supercapacitor application. Herein, we propose using an in-situ route to couple Ni-Zn-Co trimetallic oxides (NZC) with CoWO 4 (CWO) to construct an efficient hybrid composite electrode. The approach offers an intimate/compact interfacial arrangement with a better synergy of multi-atom conductivity, surface area, and numerous redox-active sites, resulting in superior electrochemical characteristics compared to its pristine counterparts. Hybrid composites with varying mass combination ratios were studied for enhanced electrochemical performance, where ZNC@CWO-10 realized a comparatively better capacitance of 370.9 F g −1 at 0.5 A g −1 with a capacitance retention value of 90% after 500 cycles. The corresponding ASC devise exhibited a high specific capacitance of 140 F g −1 at 0.5 A g −1 in the potential window of −1 to 0.8 V with maintained retention of 80% during 5000 cycles. The enhanced electrochemical characteristics were attributed to the improved composting strategy, allowing for synergism of ZNC and CoWO 4 with superior interfacial arrangement paving the route towards excellent metal/metal oxide electrode material for supercapacitor applications. • In-situ growth of CWO 4 over ZnNiCoO 4 was engineered as an efficient hybrid electrode. • The synergistic effect played a significant role in defining electrochemical assets of electrode. • ZnNiCoO 4 @CWO 4 delivered an ~30% high capacitance than its pristine counterparts. • The ASC device shows high power and energy density.
Published Version
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