In this work, hybrid porous Co₃O₄–CeO₂ hollow polyhedrons have been successfully obtained via a simple cation‐exchange route followed by heat treatment. In the synthesis process, ZIF‐67 polyhedron frameworks are firstly prepared, which not only serve as a host for the exchanged Ce3⁺ ions but also act as the template for the synthesis of hybrid porous Co₃O₄–CeO₂ hollow polyhedrons. When utilized as electrode materials for supercapacitors, the hybrid porous Co₃O₄–CeO₂ hollow polyhedrons delivered a large specific capacitance of 1288.3 F g⁻¹ at 2.5 A g⁻¹ and a remarkable long lifespan cycling stability (<3.3 % loss after 6000 cycles). Furthermore, an asymmetric supercapacitor (ASC) device based on hybrid porous Co₃O₄–CeO₂ hollow polyhedrons was assembled. The ASC device possesses an energy density of 54.9 W h kg⁻¹, which can be retained to 44.2 W h kg⁻¹ even at a power density of 5100 W kg⁻¹, indicating its promising application in electrochemical energy storage. More importantly, we believe that the present route is a simple and versatile strategy for the preparation of other hybrid metal oxides with desired structures, chemical compositions and applications.

中文翻译：

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用于高性能超级电容器的混合多孔Co3O4–CeO2空心多面体的自模板合成

在这项工作中，通过简单的阳离子交换途径然后进行热处理，已成功获得了混合多孔Co ₃ O ₄ -CeO ₂中空多面体。在合成过程中，首先准备了ZIF-67多面体骨架，该骨架不仅充当交换的Ce3 ⁺离子的主体，而且还用作合成杂化多孔Co ₃ O ₄ -CeO ₂中空多面体的模板。当用作超级电容器的电极材料时，混合多孔Co ₃ O ₄ –CeO ₂空心多面体在2.5 A g时可提供1288.3 F g ^-1的大比电容^-1和显着的长寿命循环稳定性（6000次循环后损耗<3.3％）。此外，组装了基于混合多孔Co ₃ O ₄ -CeO ₂空心多面体的不对称超级电容器（ASC）器件。所述ASC装置具有的能量密度54.9 W时千克^-1，其可以被保留，以44.2 W时千克^-1甚至在5100的功率密度钨千克^-1，表明在电化学能量存储其广阔的应用前景。更重要的是，我们认为目前的方法是一种简单且通用的策略，用于制备具有所需结构，化学组成和应用的其他杂化金属氧化物。