Electrochemical characterization of anode with thiophene derivative copolymer for all solid polymer battery
발표자
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초록
내용
When we use lithium secondary battery, there are problems about cell life, 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 electric conductivity. And we intended to introduce thieno[3,4-b]pyrazine(TP) and 2,3-dimethyl thieno[3,4-b]pyrazine(DMTP) for cyclic stability. Then the problems with low doping stability and low electric conductivity can be solved by the copolymerization of thiophene derivatives. Four types of copolymer such as poly(EDOT-co-TP), poly(3MeT-co-TP), poly(EDOT-co-DMTP) and poly(3MeT-co-DMTP) as an anode were synthesized for all solid polymer battery, and the characterization was done by FT-IR, impedance analyzer, linear seep voltammetry and cyclic voltammetry.