The construction of Zn based hybrid battery through the combination of Zn-air and Zn-Co₃O₄ batteries at cell level is a feasible strategy to integrate high voltage, specific capacity and energy density in one power supply equipment. For Zn based hybrid battery, an efficient cathode material with high specific capacitance and excellent ORR, OER activities is a vital component, which determines its performance in great extent. In this work, with Co based coordination polymer as precursor, oxygen vacancy-rich Co₃O₄ based cathode material is synthesized. In this material Co₃O₄ particles with the size about 20 to 35 nm reside evenly in mesoporous carbon matrix doped by nitrogen atoms. In OER, the overpotential of this cathode material is merely 330 mV. Its ORR proceeds with a typical four electron process with half wave achieving 0.76 V. If charge/discharge at 1 A·g⁻¹, specific capacitance of this cathode material is 254.4 mAh·g⁻¹. As current density increases to 20 A·g⁻¹, the specific capacitance still arrives at 122.5 mAh·g⁻¹ with nearly 50% retained. Based on attractive performance of this cathode material, Zn based hybrid battery is assembled. When discharge at 1 mA·cm⁻², it presences two voltage platforms at 1.71 and 1.14 V. In this situation, specific capacitance reaches 790 mAh·g⁻¹ with energy density 928 Wh·kg⁻¹. Hybrid battery shows promising stability after 300-cycle continuous test.

通过在电池单元上组合Zn-空气和Zn-Co ₃ O ₄电池来构造Zn基混合电池是将高电压，比容量和能量密度集成到一个电源设备中的可行策略。对于具有高比电容和出色ORR的高效正极材料Zn基混合电池，OER活性是至关重要的组成部分，这在很大程度上决定了其性能。在这项工作中，以Co基配位聚合物为前驱体，合成了富氧空位的Co ₃ O ₄基阴极材料。在这种材料中，Co ₃ O ₄尺寸约20至35 nm的颗粒均匀地存在于氮原子掺杂的中孔碳基质中。在OER中，这种阴极材料的过电势仅为330 mV。其ORR以典型的四电子过程进行，半波达到0.76V。如果以1 A·g ^-1进行充电/放电，则该阴极材料的比电容为254.4 mAh·g ^-1。随着电流密度增加到20 A·g ^-1，比电容仍达到122.5 mAh·g ^-1，保留了近50％。基于这种正极材料的吸引力，组装了锌基混合电池。以1 mA·cm ^-2放电时，它在1.71和1.14 V处存在两个电压平台。在这种情况下，比电容达到790 mAh·g ^-1，能量密度为928 Wh·kg ^-1。混合动力电池经过300次连续测试后显示出良好的稳定性。