When there are more nickel atom doped in spinel (the mole ratio of Mn and Ni was 1.4:0.6), the discharging platform jumped to 4.5V from original 3.8V. The materials showed to suit for positive materials in 5V lithium ion batteries.

• 在纯尖晶石中掺入的镍量较大时(锂锰的摩尔比为1.；4:0