A facial and efficient process for the synthesis of porous Zn_xCo_3-xO₄ hollow nanoboxes using zeolitic imidazolate frameworks as precursors has been demonstrated in this study, the as-prepared electrodes are applied for both LIBs and SIBs. The porous structure and hollow interspace can not only provide valuable channels and voids for lithium/sodium ion transfer and storage, but also buffer the stress/strain caused by volume changes. Besides, the enhanced electrical conductivity can effectively improve the reaction kinetics by synergistic effect of the binary metal oxides, as studied by density functional theory (DFT) calculations and storage mechanism studies. For lithium-ion batteries, the electrode exhibits an ultrahigh reversible capacity of 1141.7 mAh g⁻¹, with an initial coulombic efficiency of 95.6%, and an ultralong life up to 800 cycles at 500 mA g⁻¹. Even at a high current of 3.0 A g⁻¹, a superior capacity of 484 mAh g⁻¹ can be achieved. When using for sodium-ion battery anode, the reversible capacity is remained at 310 mAh g⁻¹ after 100 cycles at 200 mA g⁻¹, with a capacity retention of 90.4%. The electrode materials show long-term cycle stability and excellent rate capability, which gives a bright prospect for energy storage devices.

在这项研究中已经证明了使用沸石咪唑酸酯骨架作为前体合成多孔Zn _x Co _3-x O ₄中空纳米盒的表面有效方法，所制备的电极可用于LIB和SIB。多孔结构和中空空隙不仅可以为锂/钠离子的转移和存储提供宝贵的通道和空隙，而且可以缓冲由体积变化引起的应力/应变。此外，通过密度泛函理论（DFT）计算和存储机理研究，增强的电导率可以通过二元金属氧化物的协同效应有效地改善反应动力学。对于锂离子电池，该电极具有1141.7 mAh g的超高可逆容量^-1，初始库伦效率为95.6％，在500 mA g ^-1时具有长达800个循环的超长寿命。即使在3.0 A g ^-1的高电流下，也可以实现484 mAh g ^-1的出色容量。当使用钠离子电池负极，可逆容量被保持在310毫安克^-1以200mA克100次循环后^-1，具有90.4％的容量保持率。电极材料显示出长期的循环稳定性和优异的倍率性能，这为储能设备提供了广阔的前景。