Editing Graphite (section)

===Intercalated graphite===
{{main|Graphite intercalation compound}}
[[Image:CaC6structure.jpg|thumb|Structure of CaC<sub>6</sub>]]
Graphite forms [[graphite intercalation compound|intercalation compounds]] with some metals and small molecules. In these compounds, the host molecule or atom gets "sandwiched" between the graphite layers, resulting in a type of compound with variable stoichiometry. A prominent example of an intercalation compound is potassium graphite, denoted by the formula KC<sub>8</sub>. Some graphite intercalation compounds are [[superconductors]]. The highest transition temperature (by June 2009) ''T''<sub>c</sub> = 11.5&nbsp;K is achieved in CaC<sub>6</sub>, and it further increases under applied pressure (15.1&nbsp;K at 8&nbsp;GPa).<ref name="cac6">{{cite journal|pmc=5099629|author1=Emery, Nicolas |author2=Hérold, Claire |author3=Marêché, Jean-François |author4=Lagrange, Philippe |title =Synthesis and superconducting properties of CaC<sub>6</sub>| journal = Sci. Technol. Adv. Mater.|volume = 9| issue = 4|year =2008| page =044102|doi = 10.1088/1468-6996/9/4/044102| bibcode=2008STAdM...9d4102E | pmid=27878015}}</ref>  Graphite's ability to intercalate lithium ions without significant damage from swelling is what makes it the dominant anode material in lithium-ion batteries.