Dispersity of materials obtained by mechanical activation and laser sintering of Al-C systems and used for production of electrochemical capacitors

Characteristics of materials designed for electrodes of electrochemical capacitors based on mechanically activated Al-C composites applied onto aluminum foil by laser sintering are considered. The methods of X-ray diffraction, X-ray photoelectron spectroscopy, and transmission and scanning electron microscopy are used to study the structure and composition of synthesized layers. It is established that mechanical activation of aluminum in the presence of graphite followed by high-speed laser sintering of the obtained material on an aluminum foil substrate noticeably increases material dispersity with a rise in its specific surface area from an initial value of 4 m²/g to a value on the order of 1000 m²/g, as estimated from the data on the capacity of the electrical double layer.