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Electrochemical Properties of Sintered V2.46TiFe0.54-Ni Electrodes
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    Abstract:

    V2.46TiFe0.54 alloy granules and Ni powder were mixed and pressed into electrodes greens, which were sintered at 850~1100 ℃ for 5 min. The influences of sinter temperature on the morphology and the electrochemical properties of the sintered V2.46TiFe0.54-Ni electrodes were investigated. XRD and SEM (EDS) analysises show that the V, Ti and Ni elements interdiffuse between the granules and Ni powders took places, resulting in forming a diffusing interlayer, its thickness increased with raising of the sintering temperature. The alloy granule surfaces were coated by the Ni powder. The results of electrochemical measurements show that the electrochemical catalytic property and exchange current density increased with raising of sinter temperature. The maximum discharge capacity increased first, then decreased with raising of sinter temperature, the peak value is about 466 mAh/g at 900 ℃, Moreover, the cyclic stability of the sintered electrodes was also improved.

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[Zeng Huayong, Chen Yungui, Tao Mingda, Wu Chaoling. Electrochemical Properties of Sintered V2.46TiFe0.54-Ni Electrodes[J]. Rare Metal Materials and Engineering,2009,38(6):1100~1103.]
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  • Received:September 07,2008
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