Highly porous hollow/core-shell nanostructures with controlled shapes and sizes have fascinated great importance in the development of high-performance energy storage devices. The well-controlled porous nanostructures with larger surface area could provide better electrochemical behavior owing to rapid diffusion of electrolyte ions into their interiors and demonstrate maximum charge storage capacity compared to their solid counterparts. Herein, we designed highly porous spinel structured CoMn₂O₄ hollow nanospheres (CMO HNSs) and hierarchical porous MnCo₂O₄ nanoflowers (MCO NFs) with controlled morphologies using ethylene glycol as a mediated solvent with a simple and eco-friendly wet chemical method. The prepared materials demonstrate dominant battery-type behavior with excellent electrochemical performance in aqueous alkaline electrolyte. With the synergistic morphological features, the designed construction of CMO HNSs provides a maximum specific capacity of 168 mA h g-1 at current density of 1 A g-1 with superior cycling stability (∼90% at 6 A g^-1), which is comparatively higher than the MCO NFs. Moreover, a pouch-like electrochemical hybrid capacitor was fabricated with CMO HNSs and activated carbon, which delivered a maximum energy density 26.8 W h kg^-1 and power density 9816 W kg^-1 with longer cycling durability. By utilizing higher energy storage performance, the fabricated device effectively drives various portable electronic devices.

具有受控形状和尺寸的高度多孔的中空/核壳纳米结构在高性能储能装置的开发中非常着重。由于电解质离子迅速扩散到其内部，具有良好表面积的，具有良好控制的多孔纳米结构可以提供更好的电化学行为，并且与固体同类物相比，具有最大的电荷存储能力。在这里，我们设计了高度多孔的尖晶石结构的CoMn ₂ O ₄空心纳米球（CMO HNSs）和分层多孔MnCo ₂ O ₄纳米花（MCO NFs），使用乙二醇作为介导的溶剂，具有简单且环保的湿式化学方法，可控制形态。所制备的材料在碱性水溶液中具有优异的电化学性能，显示出主导的电池类型行为。具有协同的形态学特征，CMO HNS的设计结构在1 A g-1的电流密度下可提供168 mA h g-1的最大比容量，并具有出色的循环稳定性（在6 A g ^-1时约为90％），相对高于MCO NF。此外，用CMO HNS和活性炭制造了袋状电化学混合电容器，其最大能量密度为26.8 W h kg ^-1，功率密度为9816 W kg ^-1具有更长的循环耐久性。通过利用更高的能量存储性能，所制造的设备有效地驱动了各种便携式电子设备。