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Glycerol solvothermal synthesis of high-performance lithium-ion battery cathode materials with surface oxygen vacancies
Ist Teil von
Journal of materials science. Materials in electronics, 2024-02, Vol.35 (5), p.358, Article 358
Ort / Verlag
New York: Springer US
Erscheinungsjahr
2024
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Utilizing the glycerol-assisted solvothermal method, we successfully synthesized a high-performance lithium-rich layered cathode material, Li
1.2
Mn
0.54
Ni
0.13
Co
0.13
O
2
, adjusting the concentration of transition metal ions. The samples prepared via the solvothermal method exhibit a more homogeneous microstructure, with those synthesized at optimal transition metal concentrations demonstrating lower cation mixing degrees and increased surface oxygen vacancies. In comparison to LMR, the LMR-D samples exhibit enhanced cycling performance, higher discharge capacity, and superior multiplicity performance. The discharge capacity of LMR-D reached 279.6 mA h g
−1
at 1 C (250 mAhg
−1
). At 1 C (250 mAhg
−1
), the discharge capacity of LMR-D reached 279.6 mA h g
−1
, retaining 181.2 mA h g
−1
after 500 cycles, demonstrating a capacitance retention of 66.32%. In contrast, the capacity of LMR was 101.5 mA after 500 cycles, with a retention rate of 39.05%. The enhanced sample capacity and multiplicity performance of LMR-D can be attributed to both structural ordering and the increased presence of surface oxygen vacancies.