The widely adopted approach of hybridizing transition metal oxides (TMOs) with carbon materials can successfully recover the performance of TMOs for Li-ion storage. Though, the introduction of carbon may significantly reduce tap density, leading to a low volumetric capacity. Herein, copper was utilized to disperse and stabilize cobalt oxides to attain higher volumetric capacity. Thanks to the highly electronic conductive Cu-network and the designed Li-ion diffusion pore structure, the composite exhibits enormously high capacity and exceptional rate performance as anode materials for Li-ion battery. After 250 cycles at 0.1 A g^-1, the specific volumetric capacity can still be maintained at 2174.2 mA h cm⁻³ (1402.7 mA h g⁻¹), even higher than that of Li metal (2061 mA h cm⁻³). We hope this new design criteria could further open opportunities in exploration and advance the practical application of TMOs.

广泛采用的将过渡金属氧化物（TMO）与碳材料混合的方法可以成功恢复TMO用于锂离子存储的性能。但是，碳的引入可能会显着降低振实密度，从而导致较低的容积。这里，铜被用来分散和稳定氧化钴以获得更高的体积容量。由于具有高电子导电性的铜网和设计的锂离子扩散孔结构，该复合材料作为锂离子电池的负极材料具有极高的容量和出色的倍率性能。在0.1 A g ^-1下进行250次循环后，比容量仍可保持在2174.2 mA h cm ^-3（1402.7 mA hg ^-1），甚至高于锂金属（2061 mA h cm ^-3）。我们希望这项新的设计标准可以进一步开拓探索机会，并促进TMO的实际应用。