Investigation of cell parameters, microstructures and electrochemical behaviour of LiMn2O4 normal and nano powders

Synthesis of compounds, Li(MMn11/6)O4 (M=Mn1/6, Co1/6, (Co1/12Cr1/12), (Co1/12Al1/12), (Cr1/12Al1/12)) by polymer precursor method and its electrochemical performance for lithium-ion batteries

“…Two peaks around ∼4.06/4.18 and 3.94/4.07 V during anodic and cathodic scan respectively showed the well defined two step process [35,36]. The first peak is due to the removal of lithium ions from half the tetrahedral sites, where Li-Li repulsive interaction takes place and the second peak is due to the removal of lithium from the other tetrahedral site in which lithium ions do not have any nearest neighbour Li-Li repulsive interactions due to an ordering of Li + ions in -MnO 2 framework [16,47,48].…”

Synthesis and electrochemical properties of Li-rich spinel type LiMn2O4 powders by spray pyrolysis using aqueous solution of manganese carbonate

“…Spinel type LiMn 2 O 4 cathode materials [2] are thought to be promising for lithium ion batteries in EVs and HEVs, owing to advantages such as low cost, abundant source materials, non-toxicity and high thermal stability. To date, various techniques for preparing LiMn 2 O 4 cathode materials via liquidphase reactions [3][4][5][6][7][8][9][10] or solid-state reactions [11][12][13] have been developed in order to improve the electrochemical properties of the materials, including the cycling stability, rechargeable capacity and recharging rate. We have focused on spray pyrolysis among the liquid-phase reactions.…”

Band gap energies of Li2xMg(1−x)O materials synthesized by the sol–gel method

“…This variation from conventional values can be explained by the increased surface area to volume (SAV) ratio of the MgO sample. The increase of SAV ratio for a particle size 100 times smaller is in the order of 2 [15]. The larger surface area over volume ratio of nanoparticles enhance their surface effects.…”