| 초록 |
When we use lithium secondary battery on high power for electric car and energy storage system, there are several problems including the reduction of available energy. These problems influence stability and energy efficiency. To solve them, we developed a new type of lithium secondary battery to clear the interfacial resistance between electrode and electrolyte. In this study, polythiophene(PTh) derivatives were introduced into anode. For this, we intended to introduce 3,4-ethylene dioxy thiophene(EDOT) and 3-methyl thiophene(3MeT) for high conductivity and thieno[3,4-b]pyrazine(TP) and 2,3-dimethyl thieno[3,4-b]pyrazine(DMTP) for cyclic stability. Then it is expected that the low doping stability and electric conductivity due to oxygen and water oxidation can be solved by the copolymerization of thiophene derivatives. Then four types of copolymer as an anode were synthesized, and the characterization was done by FR-IR, impedance analyzer, linear seep voltammetry and cyclic voltammetry |
