Figure 2.

Ex situ (a) ³¹P MATPASS and (b) ⁷Li Hahn echo MAS NMR spectra recorded at a magnetic field strength of 4.7 T and at a spinning speed, ν_r, between 38 and 39 kHz, at different points in the first galvanostatic cycle of LiCoPO₄, cycled at a rate of C/20. The labels ‘Ch50′, “Ch115” and “Ch185” refer to the spectra of the LiCoPO₄-composite electrode, which has been charged up to 50, 115, and 185 mAh/g, respectively. The spectra labeled “discharged” and “Dis25”, were both fully charged and subsequently either fully discharged or discharged for 3 h, respectively. All of the spectra have been normalized so that the maximum intensity is equal to 1. Spinning sidebands are marked with an asterisk.