Role of Oxygen Vacancies on the Performance of Li[Ni0.5–xMn1.5+x]O4 (x = 0, 0.05, and 0.08) Spinel Cathodes for Lithium-Ion Batteries

@inproceedings{Song2012RoleOO,
  title={Role of Oxygen Vacancies on the Performance of Li[Ni0.5–xMn1.5+x]O4 (x = 0, 0.05, and 0.08) Spinel Cathodes for Lithium-Ion Batteries},
  author={Jie Song and Dong Wook Shin and Yuhao Lu and Charles Amos and Arumugam Manthiram and John B Goodenough},
  year={2012}
}
Investigation of the high-voltage Li[Ni0.5–xMn1.5+x]O4 (x = 0, 0.05, 0.08) spinels prepared at temperatures of T ≤ 900 °C and given different thermal treatments has shown that the solubility limit for oxygen vacancies in the disordered spinel phase is small at 600 °C. With x = 0, long-range ordering of Ni2+ and Mn4+ and elimination of all oxygen vacancies occurs after an anneal at 700 °C. Above 700 °C, a reversible transition from spinel to rock-salt is initiated, to accommodate oxygen loss. A… CONTINUE READING

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