在能源紧缺与环境恶化问题越来越严重的今天，新能源汽车以其高能量利用效率与零排放被认为是解决这些问题的关键。但受限于现有储能材料较低的能量密度，新能源汽车产业难以得到充分的发展。锂空气电池以其极高的理论能量密度成为替代目前锂离子电池的储能技术之一，但以其较低的循环寿命与充放电效率，仍难以进行实际运用。本研究通过在有机电解液体系的锂空气电池中使用固定于正极上的多金属氧簇类氧化还原媒介改善电池性能。结果表明采用磷钼酸处理过后的Co₃O₄纳米笼微观形貌发生改变，引入了更多氧空位的同时暴露了更多活性位点，部分磷钼酸与Co₃O₄成键固定于其表面发挥氧化还原媒介的作用，降低了电池阻抗、促进了锂离子的扩散能力、提高了催化活性与充放电容量，但对锂空气电池的循环寿命提升作用并不理想。本研究提出了以多金属氧簇类化合物处理修饰电催化活性物质的新策略，并探究了该策略对锂空气电池性能的影响，为后续多金属氧簇类物质应用于锂空气电池的研究提供了新的视角和思路。

Nowadays, the problems of energy shortage and environmental deterioration are becoming more and more serious. New energy vehicles are regarded as the key to solve these problems because of their high energy utilization efficiency and zero emissions. However, due to the low energy density of existing energy storage materials, the new energy vehicle industry is difficult to achieve full development. Lithium-air battery has become one of the energy storage technologies to replace the current lithium-ion battery because of its high theoretical energy density, but it is still difficult to be used in practice because of its low cycle life and charging and discharging efficiency. In this study, the performance of lithium air battery with organic electrolyte system was improved by using polyoxometalates redox mediator fixed on the cathode. The results showed that the morphology of Co₃O₄ nanocages changed after the treatment with phosphomolybdic acid. More defects were introduced and more active sites were exposed. Some phosphomolybdic acid bonded with Co₃O₄ on the surface to play the role of redox mediator. All these changes above reduced battery impedance, improved lithium-ion diffusion capacity, increased catalytic activity and charge-discharge capacity. However, it is not ideal to improve the cycle life of lithium air battery. In this study, a new strategy of modifying electrocatalytic active substances with polyoxometalates was proposed, and the influence of this strategy on the performance of Lithium-air batteries was explored, which provided a new perspective and thought for the subsequent research on the application of polyoxometalates in Lithium-air batteries.