Limiting voltage and capacity fade of lithium-rich, low cobalt LiNiMnFeCoO by controlling the upper cut-off voltage.

A new LiNiMnFeCoO material with a higher content of Fe and lower content of Co was designed a simple sol-gel method. Moreover, the effect of upper cut-off voltage on the structural stability, capacity and voltage retention was studied. The LiNiMnFeCoO electrode delivers a discharge capacity of 250 mA h g with good capacity retention and coulombic efficiency at 4.