Abstract: This report briefly introduces the 13th intercalation symposium on intercalation compounds held in Clermont-Ferrand in France, 6-9 June, 2005. More than 170 experts from 23 nations presented 216 contributions of the updated development in the field of intercalation compounds. Presentations covered a wide range of issues, including graphite intercalation compounds (GICs), fullerenes, nanotubes, clays and modified clays, layered metal oxides and hydroxides, hybrid and nanocomposite materials, zeolites, phosphates and other related materials. Issues in nano-GICs, organic-inorganic nanocomposites, fullerene intercalations, lithium intercalation compounds and nanoscale hydrides for hydrogen storage represent future development for intercalation compounds.