Smaller coordination numbers indicate reduced valence, indicating that when LITHIUM is inserted into D-LCO, the valence of some COBALT is reduced, which means that the PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC is treated with iron removal and lithium enters the vacancy in the Li+ state. Thus, the regeneration of LCO can be divided into two steps: decomposition of Li2CO3 and embedding of Li into D-LCO. The TG curve of Li2CO3 and the Gibbs free energy of the decomposition reaction both indicate that the decomposition temperature of Li2Co3 is much higher than 500℃, but after mixing with D-LCO, it begins to decompose at 500℃.
Obviously, PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC treatment has a "catalytic effect" on the decomposition of Li2CO3. Therefore, the theoretical calculation of this process is carried out. According to the morphology, there are visible microcracks on the surface of D-LCO, which is caused by the lithium loss caused by the long cycle. Therefore, there is a certain amount of lithium vacancy at the edge of D-LCO particles. The results show that the existence of defects leads to higher adsorption energy of Li2CO3 molecules.
The relative energy of D-LCO adsorption of Li2CO3 molecules is −4.96eV, which is much higher than that of the original LCO (P-LCO) without defects (−3.21eV). After Li2CO3 is adsorbed on the edge of D-LCO, PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC treatment is easier to decompose with the increase of temperature. At the D-LCO edge, the relative energy of Li2CO3 decomposition is −3.20 eV, which is much higher than that at the P-LCO edge. TG curves show that Li2CO3 begins to decompose at 500°C when mixed with D-LCO, but occurs at about 680°C when mixed with P-LCO.
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