A new synthesis strategy towards enhancing the structure and cycle stabilities of the LiNi_0.80Co_0.15Al_0.05O₂ cathode material

Abstract

A new synthetic strategy (Al-compensation method) for LNCA cathodes is proposed in this paper. As a result, the obtained LNCA electrodes exhibit a more stable layered structure and enhanced electrochemical performances.

LiNbO3-coated LiNi0.8Co0.1Mn0.1O2 cathode with high discharge capacity and rate performance for all-solid-state lithium battery

“…The difference in lattice parameters between NCM811 and LiNbO 3 -coated NCM811 materials should be experimental or simulation error, because the coating process is difficult to change the lattice parameters of the material. When the value of cell parameter ratio ( c / a ) is higher than 4.9, it means that layered structure is well-ordered [29] . Moreover, the larger c / a value reflects the better layered structure.…”

Facilitating Lithium-Ion Diffusion in Layered Cathode Materials by Introducing Li + /Ni 2+ Antisite Defects for High-Rate Li-Ion Batteries

“…Figure S1 shows the SEM images of the NCA samples sintered at different temperatures, which consist of irregular particles around 700 nm-1 μm and without significant differences in the morphology and particle size. As indicated in Figures 2(a)-2(e), all their diffraction peaks can be well indexed in a hexagonal structure of α-NaFeO 2 type without any impurity [39,40]. In order to reveal the detailed crystal information, the XRD data have been refined by the Rietveld method using GSAS software.…”

In/ex-situ Raman spectra combined with EIS for observing interface reactions between Ni-rich layered oxide cathode and sulfide electrolyte

“…shows the XRD patterns of LiNi 0.85-x Co 0.15 Al x O 2 materials. All the XRD diffraction peaks are similar and can be attributed to the hexagonal α-NaFeO 2 -type with a space group of R 3 m. From the local enlarged XRD pattern, the splitting degree of (006)/(012) and (108)/(110) peaks gradually increases as the Al-substitution increases from NCA005 to NCA025, meaning the typical layered structures[36] . Besides, all c / a values of LiNi 0.85-x Co 0.15 Al x O 2 materials are calculated on the basis of XRD patterns because the larger c / a value means the better layered structure.…”