High performance lithium-rich cathode modified with Al2O3 by melting impregnation method

•Al2O3-modified LRM was prepared via a low temperature melting impregnation method.•Reversible capacity of 233.6 mA h g−1 is obtained after 100 cycles at 100 mA g−1.•Al-LRM delivers 127.2 mA h g−1 at 1.0 A g−1 after 300 cycles. Lithium-rich oxides (LRM) became appealing during the past several years by virtue of the low cost and high discharge capacity. It is regrettable that the application of LRM in Lithium-ion batteries is limited due to the low Octahedral-site stabilization energy (OSSE) of Mn3+ and the dissolution of Mn and Ni. Hence, the Al2O3-modified LRM (Al-LRM) was prepared via a low temperature melting impregnation method. The specific capacity of Al-LRM is 233.6 mAh g−1, correspond to a capacity retention of 89.2% after 100 cycles. Even current up to 1 A g−1, the discharging capacity of Al-LRM is 127.2 mAh g−1 with the capacity retention of 83.6% after 300 cycles.