Röntgen- und photoelektronenspektroskopische Charakterisierung von Elektrodenmaterialien auf der Basis von V2O5

Characterization of Electrode Materials Based on V₂O₅ by X-Ray and Photoelectron Spectroscopy The investigation of various Li_xV₂O₅ compounds and V₂O₅ itself by X-ray and photoelectron spectroscopy resulted in new knowledge about the change of the structure of V₂O₅ during discharge in positive electrodes of secondary lithium batteries. The structures of the compounds produced by electrochemical reduction of V₂O₅ in aprotic lithium salt solutions are similar to these received on a chemical way. In the case of overdischarging of Li_xV₂O₅ (x > 1) the V2p_3/2 binding energy is decreased, the change of the lattice becomes irreversible, and the material is after that only uncompletely rechargeable.