Preparation and characterization of partially substituted LiMyMn2−yO4 (M=Ni, Co, Fe) spinel cathodes for Li-ion batteries

Enhancement of the electrochemical properties of LiMn2O4 through Al3+ and F− co-substitution

“…To solve this problem, several methods for improvement of the cyclability of spinel cathodes have been investigated. Among these, the substitution of a small amount of dopant ions at the Mn sites (16d) is the most commonly quoted [7][8][9]. The doping of metal ions reduced the amount of Jahn-Teller-active Mn 3+ ions, the spinel structure was stabilized, and its cyclability was improved.…”

Electrochemical properties of spinel LiCo Mn2−O4 prepared by sol–gel process

“…This has a good consistence with the result that capacity decreases with the increase of cobalt amount. In addition, it is discovered that there is a falling tendency for the potential difference between oxidation and deoxidization peaks indicating that polarization is depressed, and the cycling performance will be improved [10]. Ea: anodic peak potential, Ec: cathodic peak potential; Ia: anodic peak current density, Ic: cathodic peak current density; subscripts 1 and 2 represent the 1st and 2nd anodic or cathodic peaks.…”

Synthesis of LiMn1.9Ti0.09Si0.01O4 by self-propagating combustion method

“…To stabilize manganese, researchers have suggested the substitution of a small fraction of manganese ions at the octahedral (16d) sites with other metal cations, such as chromium [6], aluminium [7], iron and cobalt [8]. To stabilize LiMn 2 O 4 , here we propose to use Ti and Si as dopants.…”