Carbons for battery anodes prepared using inorganic templates.

摘要

Unique carbons with demonstrated utility as anodes for lithium secondary batteries have been prepared by heating hydrocarbons within an inorganic template. Disordered carbons with novel and desirable molecular porosity were synthesized by the pyrolysis of pyrene at 700 C within a pillared clay. The clay was removed by treatment with acid, leaving behind carbons with 15 to 50 (angstrom) holes. These holey carbons, when converted into electrodes, allow rapid diffusion of the lithium into and out of a carbon. Favorable results have been obtained in several tests, for example, a reversible capacity of 825 mAh/g has been achieved, about four times greater than commercial batteries using convention pyrolytic carbon.