Pyrolyzed Hexakis(p-bromophenyl)benzene as Anode Material for Li Batteries Structural and Electrochemical Aspects

A low-temperature pyrolytic stepwise method is proposed to produce substantial amount of a carbonaceous material, characterized by a graphenic structure. The pyrolyzed material has been submitted to ballmilling steps of different times, and the samples obtained were studied from their structural and electrochemical points of view. The crystallographic data have evidenced crystallites with a crystal domain size less than one nanometer and the grinding influence is discussed. Electrochemical experiments have been carried out in order to study the mechanism of the Li insertion/deinsertion process in the host material. Interesting values of Li specific capacity have been calculated from cycle experiments in Li coin cells at constant current and a test in a Li-ion laboratory-type cell is proposed.