What conditions should the battery cathode material have?

Lithium battery cathode material Lithium ion memory is embedded in the lithium composite anode material. In order to obtain a lithium battery with high output voltage, the battery cathode material should meet the following requirements: (1) Compared with lithium, the electrode potential is high, the cathode material composition does not change with the potential, and the ion conductivity and electronic conductivity are high, which is beneficial to reduce the battery (2) Lithium ion imprinting has good reversibility, with small changes in reaction volume, and fast lithium ion diffusion rate, so as to obtain good cycle characteristics and daily current characteristics; (3) Good contact with organic electrolytes and binders , Good thermal stability, which is conducive to extending battery life and improving safety performance; (4) Abundant resources, low price, stable air, non-toxic, etc. Currently, lithium battery cathode materials mainly include layered LiCoO2 and LiNiO2, spinel LiMn2O4, peridotite LiFePO4, limnxniyco1-x-yo2. Anode materials are the key to the development of lithium batteries. At present, lithium battery cathode materials are widely used in lithium cobalt acid (LiCoO2), but because the lithium cobalt acid company is small in nature reserves, the price is expensive, and there is a certain degree of toxicity. Lithium is a part of CoO2, and Co4+ is extremely oxidizing, which can easily cause accidents such as combustion and explosion. Therefore, in order to develop high-power, large-capacity power lithium-ion batteries, where multiple single cells are connected in series and parallel, the use of lithium drill acid poses a huge safety hazard. LiNiO2 was expected, but so far there has been no major breakthrough. Although the capacity is large, the preparation of pure phase materials is difficult and there are certain safety problems. LiMn2O4 has a lower price and good safety performance, but its theoretical capacity is not high, and its cycle life, thermal stability and high temperature performance are poor. Therefore, these materials are still difficult to replace lithium drilling. In 1997, a.k.peradhi et al. reported for the first time that lithium iron phosphate (LiFePO4) can be reversibly intercalated and deintercalated with lithium ions, and can be used as a negative electrode material for lithium batteries, which has attracted widespread attention. The raw material source of lithium iron phosphate is low in price, non-toxic, environmentally friendly, and has a high theoretical specific capacity (about 170mahg-1). Compared with other lithium batteries, it has a relatively mild working voltage (3.4V+/Li, Li), which is not only considered To the advantages of LiCoO2, LiNiO2, LiMn2O4 materials, and good thermal stability, superior safety performance, outstanding cycle performance, it is considered to mark a new era of lithium batteries, especially to become the first choice for lithium-ion power lithium-ion battery anode materials. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Keep these eight points in mind for the maintenance of lead-acid batteries for electric vehicles