Ti-Ni alloys as MH electrodes in Ni-MH accumulators
Ti-Ni alloys as MH electrodes in Ni-MH accumulators
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DOI：
10.1016/j.ijhydene.2008.09.002
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发表时间：
2008-12
影响因子：
7.2
通讯作者：
I. Saldan;R. Burtovyy;H. Becker;V. Ader;C. Wöll
中科院分区：
文献类型：
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作者：
I. Saldan;R. Burtovyy;H. Becker;V. Ader;C. Wöll
在300K和1bar的氢固-气反应中，Ti3.87Ni1.73Fe0.7Ox(0.2≤×≤0.8)合金的氢含量在1.93-0.05(Cwt.H，%)范围内，相应的放电容量为360-235ah/kg。利用实验PCT值关系，得到了Ti3.87Ni1.73Fe0.7O0.5合金的−32.29kJmoL−1和−111.04JmoL−1K−1的[公式：见文本]和[公式：见文本]值，滞后效应仅轻微可见。计算了Ti3.87Ni1.73Fe0.7Ox(0.2≤×≤0.8)合金的金属氢化物电极的半电池电位(vs.Hg/HgO)。Ti3.87Ni1.73Fe0.7Ox(0.2Ni1.73Fe0.7Ox(0.2≤×≤0.5))合金除具有良好的耐腐蚀性外，可满足MH电极通用标准的要求。
In hydrogen solid–gas reaction at 300K and 1bar, the hydrogen content for Ti3.87Ni1.73Fe0.7Ox(0.2≤×≤0.8) alloys was in range 1.93–0.05(Cwt.H,%), and discharge capacity of 360–235Ah/kg was achieved accordingly. The [Formula: see text] and [Formula: see text] values of −32.29kJmol−1and −111.04Jmol−1K−1, respectively, for Ti3.87Ni1.73Fe0.7O0.5alloy were obtained using experimental PCT relations, where hysteresis effect was only slightly visible. The half-cell potentials (vs. Hg/HgO) of metal hydride (MH) electrodes based on Ti3.87Ni1.73Fe0.7Ox(0.2≤×≤0.8) alloys were calculated. Ti3.87Ni1.73Fe0.7Ox(0.2≤×≤0.5) alloys might meet the requirements of general criteria for MH electrode, but only with the exception of good corrosion resistance.