To develop a high-performance positive electrode for asymmetric supercapacitor (ASC), a novel Ni₃V₂O₈@carbon nanotubes (CNTs) composite with three-dimensionally (3D) flower-like structure is designed and prepared through an in-situ hydrothermal method. The particularly open architecture self-assembled by interlacement of Ni₃V₂O₈ nano-petals with a high surface area provides interconnected ion diffusion channels and highly exposed active centers for ion absorption. The electrical conductivity and charge transport are greatly improved by anchoring CNTs on Ni₃V₂O₈. The synergistic effect between Ni₃V₂O₈ and CNTs gives rise to an improved electrochemical performance with high specific capacitance (1054 F g⁻¹ at 1 A g⁻¹), good rate capability and excellent cycling stability (89% capacitance retention after 10,000 cycles). An ASC equipped with a Ni₃V₂O₈@CNTs positive electrode and an activated rice husk carbon (ARHC) negative electrode achieves a remarkable energy density of 45.5 Wh kg⁻¹ at 795 W kg⁻¹ and outstanding cycling stability after 10,000 cycles in a wide operating voltage window of 1.6 V. The impressive performance of the Ni₃V₂O₈@CNTs composite makes it a promising candidate for commercial application.

为了开发用于不对称超级电容器的高性能正极，通过原位设计和制备了具有三维（3D）花状结构的新型Ni ₃ V ₂ O ₈ @碳纳米管（CNT）复合材料。水热法。通过将Ni ₃ V ₂ O ₈纳米花瓣与高表面积交织而自我组装的特别开放的体系结构提供了相互连接的离子扩散通道和高度暴露的离子吸收活性中心。通过将CNT锚固在Ni ₃ V ₂ O ₈上，可以大大改善电导率和电荷传输。镍之间的协同效应₃ V ₂ ö ₈和碳纳米管引起与高的比电容的改进的电化学性能（1054 F G ^-1 1 A G ^-1），良好的倍率性能和优异的循环稳定性（89％的电容保持后10,000个周期）。配备Ni ₃ V ₂ O ₈ @CNTs正极和活性稻壳碳（ARHC）负极的ASC在795 W kg ^-1时可实现45.5 Wh kg ^-1的显着能量密度，并且在10,000次循环后具有出色的循环稳定性在1.6 V的宽工作电压范围内。Ni令人印象深刻的性能₃ V ₂ O ₈ @CNTs复合材料使其成为商业应用的有前途的候选者。