V2.46TiFe<0.54>合金颗粒与Ni粉混合压成电极后在850～1100℃条件下进行烧结,时间5 min,研究了烧结温度对其形貌特征及电化学性能的影响.经XRD及SEM(EDS)分析表明,烧结后,V2.46TiFe<0.54>合金颗粒与Ni粉之间发生了V、Ti、Ni的扩散,形成了扩散中间层,该中间层的厚度随烧结温度的升高而增厚.在中间层的作用下,Ni粉较好地包覆在合金颗粒表面.电化学测试结果显示,随烧结温度的升高,电极的电化学催化性能及交换电流密度逐渐增大;最大放电容量先增大后减小,在900℃时达到最大值,约466 mAh/g.经烧结后,电极的循环稳定性得到了改善.
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