Construction of High‐performance Hybrid Supercapacitor Devices by V‐doped Flower‐like Fe₂(MoO₄)₃ and SnO₂/CNTs

作者：Wenchao Li, Tingting Hao, Jian Hao, Tenghao Ma, Li A, Songlin Yang, Jing Wang · 发表于：Chemistry - A European Journal · 年份：2025 · DOI：10.1002/chem.202500410 · 被引用次数：9 · 研究领域：Supercapacitor Materials and Fabrication、Electrocatalysts for Energy Conversion、Advancements in Battery Materials

Abstract In this work, we present for the first time an innovative strategy to construct high‐performance hybrid supercapacitors through the synergistic optimization of vanadium‐doped self‐supported three‐dimensional Flower‐like Fe₂(MoO₄)₃ anodes and SnO₂/CNTs composite anodes. The V‐doped Fe₂(MoO₄)₃ anode synthesized by a microwave‐assisted hydrothermal method combines vanadium doping‐induced oxygen vacancies, lattice distortion effects and self‐supporting properties of the three‐dimensional floral structure, which enhances the specific surface area of the material to 190.58 m 2 /g, and obtains a high specific capacitance of 2,157 F/g at a current density of 1 A/g, and undergoes a 15 A/g After 10,000 cycles at 15 A/g, the capacitance retention rate is still 98.2 %. To address the limitations of traditional anode materials, SnO₂/CNTs composites significantly reduce the charge transfer resistance (5.61 Ω) and enhance the multiplicity performance by combining the high theoretical capacity of SnO₂ with the three‐dimensional conductive network of CNTs. Based on this, the V−Fe₂(MoO₄)₃//SnO₂/CNTs hybrid supercapacitor achieves a high energy density of 151 Wh/kg at 3 A/g, which is a 30–60 % enhancement over the conventional molybdate capacitor, and maintains 96.2 % capacitance stability after 10,000 cycles. This provides a new idea for the development of energy storage devices with high energy density and long cycle life.