Properties Optimization of Alloy for a New Vanadium Based Hydrogen Storage Battery
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摘要: 以新型钒基储氢合金为试验对象，对不同Al含量添加对新型钒基储氢电池合金显微组织、吸放氢性能和充放电性能进行了测试、分析和比较。结果表明，随Al含量的添加，新型钒基储氢合金的晶粒先细化后变大，最大吸氢量先增大后减小，充放电性能先减小后增大，显微组织逐渐改善，吸放氢性能和充放电性能先提升后下降。与0.1% Al含量相比，0.3% Al含量时的平均晶粒尺寸减小了15μm，最大吸氢量增大了91.67%，放电容量衰减率减小了25%。新型钒基储氢合金的Al含量优选为：0.3%。
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关键词:
- 新型钒基储氢合金 /
- V3TiNi0.56Alx(x=0.1，0.2，0.3，0.4) /
- 显微组织 /
- 吸放氢性能 /
- 充放电性能
Abstract: In this paper,the effect of Al addition on the microstructure,hydrogen absorption and desorption property,charge and discharge performance of a new vanadium-based hydrogen storage alloy was investigated.The results show that with increase in the addition amount of Al,the grains of the new alloy are refined first and then enlarged,and the maximum hydrogen absorption first increases and then decreases with the charge-discharge performance reduced first and then enhanced.Simultaneously,the microstructure of the alloy is gradually improved coupled with the hydrogen absorption-desorption property increasing first and decreasing afterwards,with increasing the Al addition.Compared with those of the alloy containing 0.1% Al,the average grain size and discharge capacity decay rate for the alloy containing 0.3% Al respectively decrease by 15 μm and 25% with the maximum hydrogen absorption increasing by 91.67%.The optimum Al content for the new vanadium-based hydrogen storage alloy is determined at 0.3%. -
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