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- W4377263837 abstract "The P2-Na0.67Fe0.1Mn0.9O2 materials with P63/mmc space group structure is a promising cathode material for sodium-ion batteries due to its low cost and high capacity. However, the occurrence of various phase transitions reduces the cycle reversibility of the compound. In this study, P′2-Na0.67Fe0.1Mn0.9O2-δ with Cmcm space group structure is synthesized by regulating oxygen vacancies content for the first time. The effect of oxygen vacancies on the structural evolution of the material during charge-discharge processes is further investigated by in-situ X-ray diffraction (XRD) techniques. Compared to P2-Na0.67Fe0.1Mn0.9O1.98, P′2-Na0.67Fe0.1Mn0.9O2-δ experiences smaller Jahn-Teller distortion when intercalating and deintercalting Na+. Meanwhile, it exhibits better electrochemical performance. The initial discharge capacity reaches 200 mAh g−1 at a current density of 20 mA g−1 with the capacity retention of 70.8% after 200 cycles at the current density of 400 mA g−1." @default.
- W4377263837 created "2023-05-23" @default.
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- W4377263837 date "2023-08-01" @default.
- W4377263837 modified "2023-09-25" @default.
- W4377263837 title "A new synthesis route of high-performance P′2-Na0.67Fe0.1Mn0.9O2-δ and its sodium storage properties for sodium-ion batteries" @default.
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- W4377263837 doi "https://doi.org/10.1016/j.jpowsour.2023.233228" @default.
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