Citation:
WU Dan-Ni, WU Xiao-Mei, ZENG Xiao-Qin, LI Fei, SU Xin, ZOU Jian-Xin, DING Wen-Jiang. Electrochemical Studies of Substituted Cu2Mo6S8-nSen for Rechargeable Magnesium Battery[J]. Chinese Journal of Inorganic Chemistry,
;2013, 29(6): 1103-1108.
doi:
10.3969/j.issn.1001-4861.2013.00.177
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The Chevrel Phase materials Cu2Mo6S8-nSen (n=0,0.5,1.5) were synthesized by molten salt methods. Their crystal structures and the electrochemical properties were studied by a combination of X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry test (CV), galvanostatic charge-discharge test and electrochemical impedance spectroscopy (EIS). XRD analysis showed that Se-substituted Cu2Mo6S8-nSen was still Chevrel Phase, however the lattice parameters became larger, and SEM pictures viewed the particle size was small. The studies of the electrochemical properties suggested that the shape of voltammetric peaks in the region 0.5~0.8 V changed, the steady specific capacity increased to 103.5 mAh·g-1 and the cycling performance were improved because of Se substituted in Cu2Mo6S8. All these proved the reversible intercalation of Mg ions into these hosts were facilitated.
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