Li2MnSiO4 as a potential Li-battery cathode material

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

“…A new family of cathode materials have been presented recently based on the tetrahedral orthosilicates which, theoretically, are capable of a two electron intercalation process involving the M 4+/3+ and M 3+/2+ redox couples [492,493]. The dual-electron process may therefore yield cathodes with capacities exceeding 300 mA h g -1 , while the relative strength of the Si-O bond may impart a necessary structural stability.…”

In-situ XAS study on Li2MnSiO4 and Li2FeSiO4 cathode materials

“…The first report on Li 2 FeSiO 4 by Nyten was followed by explanation of the mechanism of lithium exchange during the first two cycles [7] and of stability behaviour of Fe based orthosilicates [8]. Independently we have reported on structural and electrochemical characterisations of Li 2 MnSiO 4 and Li 2 FeSiO 4 [2,[9][10][11]. Recently electrochemical characterisations of * Corresponding author.…”

“…Lithium extraction (oxidation process) from Li 2 MnSiO 4 occurs at the potential close to 4.1 V vs. metallic lithium [16]. It is followed by a change in the shape of the electrochemical curve during subsequent reduction/oxidation cycles, accompanied by an irreversible loss [9,10]. In-situ XRD experiment shows loss of intensities of Bragg reflections during first oxidation which are not retained after consequent reduction.…”

Hydrothermal Synthesis and Electrochemical Properties of Li₂Fe<i>_x</i>Mn<i>_x</i>Co_1&minus;2<i>_x</i>SiO₄/C Cathode Materials for Lithium-ion Batteries

“…3 In addition, Li 2 MSiO 4 compounds, which have a polyanionic structure, offer higher safety compared with lithium transition metal oxides as the oxygen ions are bound by strong covalent bonds. 4 5,9,10 its practical discharge capacity is less than 166 mAh g ¹1 (half of the theoretical value) between 4.5 and 1.5 V (electrolyte stability window).…”