新型储氢合金电极Ti_3Ni_2的电化学性能

研究了新型储氢合金电极 Ti3Ni2 的电化学性能。实验结果表明 :Ti3Ni2 合金电极的最大放电容量达到384.4m Ah/ g(35 3K) ,相当于 Ti3Ni2 H3.7;在 2 78K,最大容量为 145 .5 m Ah/ g,相当于 Ti3Ni2 H1 .47。高温条件下(35 3K)放电曲线有 2个平台 ,在温度比较低时 ,放电曲线只有 1个平台 ;与 Ml(Ni Co Mn A1) 5 合金相比 ,Ti3Ni2 合金电极的动力学性能不好。此外 ,温度对 Ti3Ni2 合金电极的电化学性能影响明显。在温度比较高的条件下 ,合金的放电容量、动力学特性、荷电保持能力均有大幅改善。

Electrochemical Behavior of New Type Ti_3Ni_2 Hydrogen Storage Electrode

The electrochemical properties of new type Ti 3Ni 2 hydrogen storage electrode have been studied in detail. It is shown that the largest discharge capacity of Ti 3Ni 2 electrode reaches 384 5 mAh/g at 353K and 145 5 mAh/g at 278 K (corresponding to Ti 3Ni 2H 3 7 and Ti 3Ni 2H 1 47 hydride respectively). At high temperature (353K) two plateaus of discharge curve appear, but at low temperature only one plateau. Compared with Ml (NiCoA1Mn) 5 electrode, the dynamics of Ti 3Ni 2 electrode is poor. The discharge capacity, dynamics and charge retentivity of Ti 3Ni 2 electrode are improved greatly at high temperature.