Preparation and Structural and Electrochemical Characteristics of a Carbon-Containing Material Based on Aspen Bark Modified with Zinc and Iron Chlorides

The possibility of using aspen bark modified with zinc and iron chlorides for preparing highly porous materials with specific properties was examined. The effect of the treatment temperature and modifiers on the structural and electrochemical parameters of the carbon-containing product was revealed. Carbonization of aspen bark modified with ZnCl 2 yielded a material with the specific surface area of up to 1350 m 2 g –1 , containing a crystalline zinc oxide phase. The material obtained using a mixture of aspen bark with FеCl 3 had the specific surface area of up to 300 m 2 g –1 and contained magnetite and maghemite. Modification of the bark with zinc and iron chlorides simultaneously yielded a highly porous product with ferromagnetic properties. The apparent capacitance of the samples carbonized at 800°С was found to be 150–400 F g –1 . The possibility of using these materials in electrochemical devices was suggested.