Observation of micropores in hard-carbon using 129Xe NMR porosimetry

Abstract The existence of micropores and the change of surface structure in pitch-based hard-carbon in xenon atmosphere were demonstrated using 129 Xe NMR. For high-pressure (4.0 MPa) 129 Xe NMR measurements, the hard-carbon samples in Xe gas showed three peaks at 27, 34 and 210 ppm. The last was attributed to the xenon in micropores (