The energy that can be stored in lithium-ion batteries is typically limited by the redox chemistry of the transition metals within the cathodes. Now it is shown that for Li1.2[Ni2+0.13Co3+0.13Mn4+0.54]O2, a 3d-transition-metal oxide that breaks this limit, Li-ion extraction is charge compensated not just by transition-metal oxidation but also through the generation of localized electron-holes on oxygen.
- Kun Luo
- Matthew R. Roberts
- Peter G. Bruce
