Rechargeable alkaline battery is a potential high-powered next-generation electrochemical energy storage equipment. However, the inferior energy density, compare with other electrochemical energy technologies, restrict its further practical applications. To address this, the rational design and optimization of electrode is of significance. Herein, we demonstrate the construction of high energy density NiCo/Bi alkaline battery by controllable MOF hydrolysis. Specifically, the hydrolysis conversion of Bi-MOF into Bi₂O₃ is performed on a large scale for the first time. The obtained flower-like Bi₂O₃ present large specific capacity, excellent rate capability and stable cycles life. And a series of ex-situ characterizations were employed to trace the phase transformation and morphological changes in charge-discharge. Meanwhile, Ni/Co layered double hydroxide hierarchical microspheres were also prepared via the hydrolysis of bimetallic Ni/Co-MOF. Furthermore, the assembled NiCo//Bi alkaline battery based on NiCo-LDH cathode and Bi₂O₃ anode perform a high energy density of 84.9 Wh/kg at 1600 W/kg, indicating its potential in practical applications.

可充电碱性电池是一种潜力巨大的下一代电化学储能设备。然而，与其他电化学能源技术相比，较低的能量密度限制了其进一步的实际应用。为了解决这个问题，电极的合理设计和优化具有重要意义。在此，我们展示了通过可控 MOF 水解构建高能量密度 NiCo/Bi 碱性电池。具体而言，Bi-MOF水解转化为Bi ₂ O ₃是首次大规模进行。所得花状Bi ₂ O _{3 具有}大的比容量、优异的倍率性能和稳定的循环寿命。以及一系列易地表征被用来追踪充放电过程中的相变和形态变化。同时，还通过双金属Ni/Co-MOF的水解制备了Ni/Co层状双氢氧化物分级微球。此外，基于NiCo-LDH正极和Bi ₂ O ₃负极组装的NiCo//Bi碱性电池在1600 W/kg下表现出84.9 Wh/kg的高能量密度，表明其在实际应用中的潜力。