Polymer anode based on thiophene derivative copolymer for all solid polymer battery
발표자
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초록
내용
When we use lithium secondary battery on high power for electric car and energy storage device, there are several problems about stability, cell life and energy efficiency. In this study, thiophene(Th) derivative copolymers were introduced into the anode. For this, we intended to introduce 3,4-ethylene dioxy thiophene(EDOT) and 3-methyl thiophene(3MeT) for high electric conductivity. And thieno[3,4-b]pyrazine(TP) and 2,3-dimethyl thieno[3,4-b]pyrazine(DMTP) were introduced for cyclic stability. Then a copolymer comprising a combination of Th derivatives solved the low doping stability and low electric conductivity. Accordingly, 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.