The influence of holding time on the performance of LiNi0.5Mn1.5O4 cathode for lithium ion battery

Synthesis of LiNi0.5Mn1.5O4 by solid-state reaction with improved electrochemical performance

“…The doped spinel compounds usually have a similar capacity of about 150 mAh g −1 but differ a lot in their operating potentials. The new spinel cathode material LiNi 0.5 Mn 1.5 O 4 exhibits a high potential of about 4.7 V (versus Li) with a theoretical capacity of 146.7 mAh g −1 [5][6][7][8]. Its cycling performance is better than that of LiMn 2 O 4 which contains half of its manganese ions in the form of Mn 3+ that is mainly responsible for the capacity fading [9][10][11][12].…”

Recent developments in the doping of LiNi0.5Mn1.5O4 cathode material for 5 V lithium-ion batteries

“…The cathodes with high voltage cannot only allow anodes working significantly above 0 V, then avoiding the formation of metallic Li, but also enhance the total output voltage of batteries [14]. LiNi 0.5 Mn 1.5 O 4 compound exhibits a high voltage of about 4.7 V in charge/discharge process [53], which is a promising cathode material for lithium-ion battery.…”

“…2 [12], Mn 4+ and Ni 2+ ions are ordered on octahedral sites in a 3:1 ratio (i.e., Ni atoms in 4b sites, Mn atoms in 12d sites, and O atoms in 8c and 24e sites). It has been reported that LiNi 0.5 Mn 1.5 O 4 with Fd-3m space group has a better electrochemical performance than that of spinel with P4 3 32 space group due to a 2.5 orders of magnitude faster electronic conductivity [14,15]. The space difference is difficult to determine with XRD technique owing to a similar scattering behavior of Ni and Mn.…”

Confined growth of CuO, NiO, and Co3O4 nanocrystals in mesoporous silica (MS) spheres

“…Metal oxide nanoparticles are widely used in many technological applications, such as coating [1,2], catalysis [3][4][5], electrode materials [6], sensors [7][8][9], and so on [10,11]. But physical and chemical properties of metal oxide nanoparticles are strongly influenced by their aggregation.…”