A series of poly(ethylene oxide)(PEO)/LiClO4 complex samples with different molar ratios were studied systematically by solid-state high—resolution 13C and 7Li—NMR spectroscopy.It was found that with the presence of a small amount of water(9%~16%by weight)
the initial increase of LiClO4gradually destroys crystals formed by PEO
whilc further increase of LiClO4 brings about the crystals formed by PEO and Li+.When the molar ratio of PEO to LiCl4 is in the range of 6/1 to 8/1
the complex samples are completely amorphous.The7Li-NMR results indicate clearly that the existence of water hinders the formation of Li+-PEO crystals.