Fig. 1

Stabilization of high-T phase at room temperature. a XRD patterns of Li(CB9H10) at 150 °C and 0.7Li(CB9H10)–0.3Li(CB11H12) at room temperature. b DTA curves of Li (CB9H10) and 0.7Li(CB9H10)–0.3Li(CB11H12). c Raman spectra of Li(CB9H10), Li(CB11H12), and 0.7Li(CB9H10)–0.3Li(CB11H12). d FE-SEM images of 0.7Li(CB9H10)–0.3Li(CB11H12). The magnified image (right) is of the yellow marked area (left). Scale bars, 20 μm for the left image in d and 3 μm for the right image in d