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Citation: SUN Xin-Yang, ZHOU De-Bi, LV Dong, TAN Long-Hui, ZHAO Wei-Li. Application of Novel CarboN-supported Cobalt Polythiophene Composite Catalysts in Zinc-air Cell[J]. Chinese Journal of Applied Chemistry, ;2010, 27(12): 1424-1429. doi: 10.3724/SP.J.1095.2010.00041 shu

Application of Novel CarboN-supported Cobalt Polythiophene Composite Catalysts in Zinc-air Cell

College of Chemistry & Chemical Engineering, Central South University, Changsha 410083

Received Date: 19 January 2010
Revised Date: 29 March 2010

Cobalt/polythiophene/carbon black composite catalysts(Co-PTh/C) were firstly synthesized by an oxidative chemical polymerization and then were tested as a reduction reagent in the gas diffusion electrode of zinc-air cells.The as-prepared catalysts were characterized by means of SEM-EDX and TEM techniques,which showed that they dispersed uniformly and had a size range of 10 to 30 nm.The catalytic activity of the products towards ORR(oxygen reduction reaction) in a 6 mol/L KOH aqueous solution was evaluated by cathodic polarization curves(LSV) and electrochemical impedance spectroscopy(EIS).A current density of 0.152 A/cm² at-0.20 V(vs.Hg/HgO) could be achieved on the electrode with Co-PTh/C as catalyst,which is superior to 5% Pt/C.Using this electrode as a positive electrode and pure zinc as a negative electrode,a zinc-air cell could be assembled.The cell showed a stable voltage platform of 1.1 V with a constant current density of 0.075 A/cm² when discharged in a 6.0 mol/L KOH solution.
- polythiophene,
- oxygen reduction,
- gas diffusion electrode,
- current density
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