Although the weight loss continues to increase above 700°C, the peak stops moving. Thus, regeneration occurs in the 500-700 °C range. Among them, Li2O produced by the thermal decomposition of Li2CO3 enters the CoO6 layer, leading to lattice expansion of PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC field after iron removal. To verify this lattice expansion, the crystal plane spacing of D-LCO and R-LCO was compared using a high-resolution transmission electron microscope. The crystal plane spacing of D-LCO and R-LCO is 3.9A and 4.8197, which are consistent with XRD results.
X-ray absorption of the near-edge structure also confirms that Li is embedded in LCO. The midpeak corresponds to the twisted octahedral environment of the Co atom. The higher peak intensity in D-LCO indicates that Li deintercalation results in greater hybridization between Co 4p and 3d orbitals. The lower peak intensity of R-LCO indicates that an inverse process has occurred in the PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC field, i.e. lithium reinsertion occurred during regeneration.
The main peak is associated with multiple scattering of photoelectrons ejected from Co atoms. When delithium is removed, the main peak shifts towards higher energies, while when lithium is inserted, the reverse is true. Peak B in R-LCO is obviously transferred to a lower energy, confirming that LITHIUM intercalation occurs when the PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC is removed from iron. Extended X-ray absorption fine structure spectra show that Co4+ ions are reduced, and the coordination number (4.0±1.0) and bond distance in Co-Co shells of R-LCO are smaller than that of D-LCO.
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