Quinone Amine Polymer Synthesis And Its Electrochemical Properties

The researches and developments of quinone-amine polymer as a new functional polymer material were reviewed. The synthesis of quinone-amine polymers was studied by solution polymerization and novel microwave solid-state polymerization and electrochemical properties of quinone-amine polymers were determined.Four quinone-amine polymers were prepared by solution polymerization of p-benzoquinone with o-phenylenediamine, p-phenylenediamine, benzidine and 1,6-hexanediamine respectively. By means of single factor and orthogonal experiments, the influences of reaction conditions such as charge ratio, oxidant amount, solvent amount, reaction temperature and reaction time on the conversion and inherent viscosity of the polymers were investigated, which led to the optimized synthesis conditions. The optimal conditions of the reaction between p-benzoquinone (PBQ) and p-phenylenediamine (p-PDA) were as follows: PBQ : p-PDA =3:1 (mol), oxidant amount was 3 mol/mol p-PDA, solvent amount was 12mL/0.01mol reactant, reaction temperature was 70, reaction time was 3 h. Then the solid-state polymerization of quinone and diamine was studied under microwave irradiation, and the effects of microwave power, irradiation time and irradiation manner on the reaction were discussed. The optimal conditions of microwave solid-state polymerization between PBQ and p-PDA were that PBQ : p-PDA =1:1 (mol), no oxidant, irradiation time of 490W microwave was 30 min, intermission time was 5 min. The polymerisates were characterized by infrared spectroscopy, ultraviolet spectroscopy and other analytical methods, which showed that the reaction products obtained from solution and by microwave solid-state polymerization were the same, and the solubilities, thermal stabilities and charge transfer properties of these quinone-amine polymers were also determined.The electrochemical properties of the polymer synthesized from PBQ and p-PDA were tested by cyclic voltammetry, constant current discharge of single electrode and charge/discharge of lithium battery. Thepolymer obtained by microwave irradiation showed better electrochemical activity, capacity, stability and recurrence than the polymer obtained by solution polymerization did on the same test condition. In addition, the constant current charge/discharge performance and cyclic reversibility of simulative battery composed of the polymer anode and lithium cathode were good. The charge/discharge efficiency was 92.7%, and specific capacity and specific energy were about 41 mA ?h ?g and 98 mW ?h ?g respectively. These make quinone-amine polymer a likely candidate for active electrode material of secondary battery.