X-Ray Diffraction and Raman Scattering Studies of Electrochemically Cycled CuV[sub 2]O[sub 6]

was prepared by a precipitation method followed by heat treatment at . The material showed an initial discharge capacity of , which decreased to after 30 cycles. X-ray diffraction showed an irreversible structural change of the material from crystalline to amorphous phase after the first cycle. Contrarily, Raman scattering showed the reversible change of the material's local structure in the first cycle. Further, Raman scattering confirmed the gradual increase of irreversible phase in the cathode material, which was responsible for the poor cycling performance of .