Summary:

The present invention relates to a nitrogen-doped conductive carbide molybdenum oxalate lithium composite lithium replenishing agent and its preparation method and application. The present invention is first mixed with C3N4 and ammonium molybdate in a specific proportion of sanding, after spray drying to obtain the precursor, and then in an inert atmosphere for reduction and carbonisation to obtain nitrogen-doped conductive molybdenum carbide catalyst, after which lithium oxalate sanding to obtain nano-lithium oxalate, and then dispersed and mixed with a specific proportion of the two by spray drying to obtain the method of industrial scaling up the production of the method of uniformity and consistency can be guaranteed very well. The uniformity and consistency of this method can be well guaranteed in the industrial scaled-up production. Further, the battery containing the above compound lithium recharge agent was subjected to charge and discharge experiments, which not only showed high lithium recharge capacity, but also lowered the decomposition voltage to 4.12 V. The D-NCM622-M1||Gr and D-NCM622-M1||Sr prepared with the above compound lithium recharge agent were further tested by spray drying, and the homogeneity and consistency were guaranteed in the industrial scale-up production. M1||SiC, the first-time capacity of the full battery was significantly improved, and the reduction of active lithium loss could be reduced to less than 18%.

Link: http://epub.cnipa.gov.cn/patent/CN117977025A