Lithium-iron-orthosilicate is one of the most promising cathode materials for Li-ion batteries due to its safety, environmental brightness and potentially low cost. In order to produce a low cost cathode material, Li2FeSiO4/C samples are synthesized via sol-gel (SG; one sample) and solid state (SS; two samples with different carbon content), starting from Fe (III) in the raw materials (lo...

Lithium iron orthosilicate (Li2FeSiO4) with Pmn21 space group is theoritically investigated as a chathode material of Li-ion batteries using density functional theory (DFT) calculations. PBE-GGA (+USIC), WC-GGA, L(S)DA (+USIC) and mBJ+LDA(GGA) methods under spin-polarization ferromagnetic (FM) and anti-ferromagnetic (AFM) procedure are used to investigate the material properties, includin...

case of 18 kN, a considerable portion of the particles are mechanically broken. The structure is condensed nearly without cavities. It might be useful to prepare pellets of high density, as the diffusion coefficient of tritium in Li,SiO, or Li4Si04 is on the order of 2 magnitudes higher than in the other lithium compounds.’ Li2Si03.nH20 is X-ray amorphous. ‘ A considerable portion of the powder...

Lithium metal orthosilicates are attracting a lot of attention owing to their promising prospects as potential high capacity cathode materials for Li-ion batteries. Currently, great efforts are being made in order to achieve the full theoretical specific capacity of 330 mA h g(-1), but many issues remain unsolved (e.g., poor structural and cycling stability), which limit their practical applica...

Recently, intensive efforts are dedicated to convert and store the solar energy in a single device. Herein, dye-synthesized solar cell technology is combined with lithium-ion materials to investigate light-assisted battery charging. In particular we report the direct photo-oxidation of lithium iron phosphate nanocrystals in the presence of a dye as a hybrid photo-cathode in a two-electrode syst...

Nanocrystalline Li2MSiO4 (M = Fe, Mn) particles embedded between in situ formed rGO sheets are obtained by adopting customized solvothermal synthesis. An appreciable room temperature specific capacity of 149 mA h g(-1) with 89% capacity retention and 210 mA h g(-1) with 87% retention have been exhibited by Li2FeSiO4/rGO and Li2MnSiO4/rGO composites, corresponding to the participation of close t...