Borates . aluminates: comparing the anion for lithium-ion batteries.

Lithium borate and aluminate salts bearing a hexafluoroisopropoxy ligand have been prepared and investigated for use in lithium-ion batteries and Cu‖Li cells. Lithium aluminate salts have poorer air tolerance but Li[Al(hfip)] resulted in superior battery cycling, with lower overpotentials for plating and stripping in Cu‖Li cells.

O3 to O1 Phase Transitions in Highly Delithiated NMC811 at Elevated Temperatures.

Nickel-rich layered oxide cathodes such as NMC811 (LiNiMnCoO) currently have the highest practical capacities of cathodes used commercially, approaching 200 mAh/g. Lithium is removed from NMC811 via a solid-solution behavior when delithiated to > 0.10, maintaining the same layered (O3 structure) throughout as observed via operando diffraction measurements.