According to Gibbs free energy calculation of Li2CO3 -- Li2O, Li2CO3 can only decompose after heating to about 700°C. P-LCO has little effect on the decomposition of Li2CO3, while D-LCO has a "catalytic effect" on its decomposition, which is caused by its edge defects. The reaction between different LCO samples and Li2CO3; The relative energy of reaction between different LCO samples and Li2CO3; TG curve of D-LCO and Li2CO3 mixture; TG curve of P-LCO and Li2CO3 mixture; Gibbs free energy of possible reaction of PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC during regeneration; Diffusion barrier during Li+ embedding of D-LCO vacancy.
Based on XANES and EXAFS results, lithium enters the interlayer as Li+. According to Gibbs free energy calculation, Li2O cannot be reduced to Li even if the temperature exceeds 1000°C. Thus, LITHIUM exists in the form of Li2O, and Li+ diffuses within D-LCO, PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC to ensure efficient filling of each Li+ vacancy. The calculation shows that there is a diffusion barrier of about 1.45eV between the initial state and the transition state.
Amorphous materials have been observed on the edges of delixed PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC degraded graphite, which may be residual binders and SEI. In contrast, R-graphite has clean edges. The spacing between the two graphite samples and the corresponding crystal faces is almost the same. Raman spectrum results show that the peak intensity continues to decrease with the increase of temperature, but the peak intensity does not change significantly. Therefore, ID/IG decreased from 0.60 to 0.24, indicating a significant increase in graphitization during activation.
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