Porous polythiophene as a cathode material for lithium batteries with high capacity and good cycling stability |
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Authors: | Li Liu Fanghua TianXingyan Wang Zhenhua Yang Meng ZhouXianyou Wang |
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Affiliation: | a School of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Xiangtan 411105, China b Faculty of Materials, Optoelectronics and Physics, Xiangtan University, Xiangtan 411105, China |
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Abstract: | Polythiophene (PTh) has been synthesized by chemical oxidative polymerization and used as an active cathode material in lithium batteries. The lithium batteries are characterized by cyclic voltammetry (CV), galvanostatic charge/discharge cycling and electrochemical impedance spectroscopic studies (EIS). The lithium battery with the PTh cathode exhibits a discharge voltage of 3.7 V compared to Li+/Li and excellent electrochemical performance. PTh can provide large discharge capacities above 50 mA h g−1 and good cycle stability at a high current density 900 mA g−1. After 500 cycles, the discharge capacity is maintained at 50.6 mA h g−1. PTh is a promising candidate for high-voltage power sources with excellent electrochemical performance. |
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Keywords: | Lithium secondary battery Conducting polymer Polythiophene |
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