Résumé
Copper phosphide, Cu-3,P has been synthesized using a ceramic route, and its electrochemical behaviour versus lithium has been studied studied galvanostatic and potentiodynamic measurements and in situ X-ray diffraction analysis. The insertion/extraction mechanism proceeds with the formation of at least three different Li-x,CU3-xP (x = 1, 2, 3) phases. The electrochemical behaviour Of CU3P samples obtained from ceramic and solvothermal syntheses are compared to further understanding of the complex redox mechanism occurring during insert ion/extract ion. First-principle electronic structure calculations show that discharge probably begins with the formation of a solid solution Li-x,Cu3-yP (x < 0.5).