Preparation and Properties of Vanadium-based Hydrogen Storage Alloy for V-Ti-Ni-Al Battery Negative Electrode
-
摘要: 以V3TiNi0.56Al0.3电池负极用钒基储氢合金为试验对象,进行了不同球磨转速和烧结温度下吸放氢性能和电化学稳定性的测试、对比和分析。结果表明,随球磨转速的加快和烧结温度的升高,试样的最大吸氢量先增大后减小,放电容量衰减率先减小后增大,吸放氢性能和电化学稳定性能先提高后下降。与300 r/min球磨转速相比,600 r/min球磨转速时的最大吸氢量增大了26.53%,放电容量衰减率减小了50%;与1 000℃烧结温度相比,1 300℃烧结温度时的最大吸氢量增大了21.17%,放电容量衰减率减小了46.6%。V3TiNi0.56Al0.3电池负极用钒基储氢合金的工艺参数优选为:球磨转速600 r/min、烧结温度1 300℃。Abstract: The hydrogen absorption and desorption properties and electrochemical stability of vanadium-based hydrogen storage alloy for negative electrode of V3TiNi0.56Al0.3 battery at different ball milling speeds and sintering temperatures were tested,compared and analyzed.The results show that with the increase of ball milling speed and sintering temperature,the maximum hydrogen uptake first increases and then decreases,while the discharge capacity decay rate first decreases and then increases,with the hydrogen uptake and desorption performance and electrochemical stability of the alloy increasing first and then decreasing.Compared with those of the alloy obtained at 300 rpm of ball milling speed,the maximum hydrogen absorption is increased by 26.53% and the discharge capacity attenuation is decreased by 50% for the alloy at 600 rpm of ball milling speed.The maximum hydrogen absorption is increased by 21.17% and the discharge capacity attenuation is decreased by 46.6% for the alloy obtained at 1 300 ℃ of sintering temperature,compared with the alloy at 1 000 ℃ of sintering temperature.The technological parameters of vanadium-based hydrogen storage alloy for negative electrode of V3TiNi0.56Al0.3 battery are optimized at 600 r/min of ball milling speed and 1 300 ℃ of sintering temperature.
-

计量
- 文章访问数: 197
- HTML全文浏览量: 15
- PDF下载量: 4
- 被引次数: 0