Electrochemical Properties for Co-Doped Pyrite with High Conductivity

Yongchao Liu and Shengping Wang
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Yongchao Liu: Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
Shengping Wang: Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China

Energies, 2015, vol. 8, issue 9, 1-10

Abstract: In this paper, the hydrothermal method was adopted to synthesize nanostructure Co-doped pyrite (FeS 2 ). The structural properties and morphology of the synthesized materials were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Co in the crystal lattice of FeS 2 could change the growth rate of different crystal planes of the crystal particles, which resulted in various polyhedrons with clear faces and sharp outlines. In addition, the electrochemical performance of the doping pyrite in Li/FeS 2 batteries was evaluated using the galvanostatic discharge test, cyclic voltammetry and electrochemical impedance spectroscopy. The results showed that the discharge capacity of the doped material (801.8 mAh·g ?1 ) with a doping ratio of 7% was significantly higher than that of the original FeS 2 (574.6 mAh·g ?1 ) because of the enhanced conductivity. Therefore, the doping method is potentially effective for improving the electrochemical performance of FeS 2 .

Keywords: pyrite; lithium iron disulfide battery; Co doping; electrochemical performances (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
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