Cathode Material-Lithium Manganate

At present, the relatively mature lithium manganate has a spinel structure, and the layered structure is also being studied by many manufacturers, but it cannot be applied to batches; the molecular formula of spinel lithium manganate is LiMn2O4, and manganese has two components in this compound. One valence state, trivalent and tetravalent; relative to tetravalent manganese, trivalent manganese is a drug for bad wine, because it can undergo disproportionation reaction to sprout soluble divalent manganese, which causes a large decrease in the capacity of lithium manganese oxide ; Therefore, for lithium-ion manganese batteries, low-voltage storage is worse than high-voltage storage. In addition, lithium manganese oxide has a series of reactions, such as structural John-Taler distortion, which will also cause irreversible loss of capacity; the erosion of HF acid will also accelerate the dissolution of manganese; three major weaknesses make lithium manganese oxide at high temperatures. The capacity decays abnormally quickly; domestic manufacturers are also working hard to deal with this problem, but with little effect; the representative domestic manufacturers of lithium manganate are: Qingdao Qianyun, CITIC Guoan, Hunan Shanshan, Shenzhen Yuanyuan, Xin Just wait; they have also spent a lot of effort to improve the high temperature problem of lithium manganate, but it is still far from the expected level; for Qianyun’s new product QY-EVM01, the capacity has been decayed by 150 cycles at 55 degrees. To 80%, the capacity decays 60% after 800 times (factory data, our company's results are still under investigation); the high temperature decay of lithium manganate is like this, the early decay is very fast, and the latter gradually stabilizes. Therefore, in the true sense, the The high temperature problem of the new product has not been dealt with sideways. Other manufacturers also often promote the good circulation of room temperature, and often avoid talking about the problem of high temperature; in fact, for China, the problem of high temperature is a big concern for lithium manganate! The manufacturer that makes a lot of bicycle batteries also uses pure manganese. After a summer's baptism, it must be almost returned. I hope that in the near future, the high temperature of lithium manganese oxide can be truly processed, and it will inject strong blood into bicycles and electric vehicles! Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.