Hollow nanostructures of transition metal oxides (TMOs) with hollow interior, low density, large surface area and surface permeability have drawn significant interest as electrode materials for supercapacitors. However, it is still challenging to controllably prepare hollow nanostructures by a facile method. Herein, we report for the first time that CuCo₂O₄ microrod precursor obtained from a solvothermal method in ethanol media can be converted into porous CuCo₂O₄ microtubes (CuCo₂O₄ MTs) in the post annealing treatment. The results of electrochemical tests demonstrate that these MTs are categorized as the typical battery-grade electrode materials. They can deliver a high capacity up to 393.66 C g⁻¹ at 1 A g⁻¹ and still hold 305.99 C g⁻¹ at 10 A g⁻¹. Additionally, an assembled hybrid supercapacitor (CuCo₂O₄ MTs//AC HSC) exhibits 78.23 F g⁻¹, good cycling durability and high energy density (32.49 W h kg⁻¹ at 912.10 W kg⁻¹). The present synthetic methodology may be further applicable to the preparation of other hollow structural TMOs with applications in high-performance energy storage and conversion devices.

具有中空内部、低密度、大表面积和表面渗透性的过渡金属氧化物（TMO）的中空纳米结构作为超级电容器的电极材料引起了人们的极大兴趣。然而，通过简便的方法可控地制备中空纳米结构仍然具有挑战性。此，我们报告该CUCO首次₂ ö ₄从在乙醇介质中的溶剂热法得到的前体microrod可被转化成多孔CUCO _2个ö ₄微管（CUCO ₂ Ò ₄MTs）在后退火处理中。电化学测试结果表明，这些 MTs 被归类为典型的电池级电极材料。他们可以高达393.66 C g还提供高容量^-1 1 A G ^-1和仍持有305.99 C g还^-1 10 A G ^-1。此外，组装的混合超级电容器（CuCo ₂ O ₄ MTs//AC HSC）表现出 78.23 F g ^-1、良好的循环耐久性和高能量密度（32.49 W h kg ^-1 at 912.10 W kg ^-1）。本合成方法可进一步适用于其他中空结构 TMO 的制备，并在高性能能量存储和转换装置中应用。