Investigation of the electrochemical intercalation of Ca 2+ into graphite layer carbon nano filaments as a novel electrode material for calcium-ion batteries

We investigated the electrochemical intercalation of Ca 2+ or solvated Ca 2+ into Marimo nano carbon (MNC) as an anode material for calcium-ion batteries. When Ca (ClO 4 ) 2 and Ca (TFSI) 2 were used as electrolyte salts, the solution structure changed in the γ-butyrolactone solvent. Additionally, higher charge capacitance was obtained at the MNC electrode than at the graphite electrode. When heat-treated MNCs were used with each electrolyte (ClO 4 ) 2 intercalated better than Ca (TFSI) 2 .