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Showing 1–5 of 5 results
Advanced filters: Author: John-Joseph Marie Clear advanced filters

  • In this work, authors show that O-redox in 4d and 5d transition metal oxides involves the formation of molecular oxygen trapped in the particles. These results are in accord with observations in 3d oxides and show that the greater covalency of the 4d and 5d oxides does not stabilise peroxo-like species.

    • Robert A. House
    • John-Joseph Marie
    • Peter G. Bruce
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-7

  • Oxygen redox cathodes deliver higher energy densities than those based on transition metal redox but commonly exhibit voltage fade on extended cycling. The loss of O-redox capacity and voltage fade is shown to arise from a reduction in O2−/O2 redox process reversibility and O2 loss.

    • John-Joseph Marie
    • Robert A. House
    • Peter G. Bruce
    ResearchOpen Access
    Nature Materials
    Volume: 23, P: 818-825

  • The mechanism of oxygen redox in high-energy transition metal oxide cathodes is elusive. Here the authors illustrate the nature of the electron-hole states on oxide ions, offering insights for realizing reversible, high-voltage cathodes.

    • Robert A. House
    • Gregory J. Rees
    • Peter G. Bruce
    Research
    Nature Energy
    Volume: 8, P: 351-360

  • Understanding the severe voltage hysteresis in the first cycle of Li-rich cathodes is essential to realize their full potential in batteries. P. G. Bruce and colleagues report the formation of molecular O2 on charging rather than other oxidized O species is the cause for the voltage hysteresis.

    • Robert A. House
    • Gregory J. Rees
    • Peter G. Bruce
    Research
    Nature Energy
    Volume: 5, P: 777-785

  • Oxygen redox in Li-rich oxide cathodes is of both fundamental and practical interest in Li-ion battery development. Bruce and team examine the current understanding of oxygen-redox processes, especially those concerning O2 formation, and discuss strategies that can harness oxygen redox with suppressed side effects.

    • Robert A. House
    • John-Joseph Marie
    • Peter G. Bruce
    Reviews
    Nature Energy
    Volume: 6, P: 781-789