Mn oxidation state controllable spinel manganese-based intergrown cathode for excellent reversible lithium storage

Herein we report a novel hierarchical porous hollow cube-shaped 5 V spinel manganese-based intergrown cathode materials with controlling the average oxidation state of Mn. The equal proportion of LiNi_0.5Mn_1.5O₄ and LiMn₂O₄ (LiMn_1.75Ni_0.25O₄) intergrown cathode materials exhibit the most excellent electrochemical performance with the initial discharge capacity and energy density as high as 141.7 mAh g⁻¹ and 627.8 Wh Kg⁻¹ at 1 C. What's more, even though cells are performed at elevated temperature and encounter with intermittent high rate load, considerably superior cycle stabilities still are retained. The LMO/LNMO-1/1 yields the primal discharge capacity of 142.5 mAh g⁻¹ and 140.8 mAh g⁻¹, with 93.1% and 92.9% capacity retention up to 50 cycles at 55 °C and subjecting to intermittent 5 C discharge and charge load every five cycles, respectively.