Ultrasonic Casting Process Optimization of Vanadium-based Hydrogen Storage Alloy
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摘要: 采用不同的超声振动频率和浇注温度参数, 对V3Ti0.56Cr0.1Mo0.1钒基储氢电池合金试样进行了超声铸造, 并进行了储氢性能和电化学循环性能的测试与分析。结果表明:与95 Hz相比, 超声振动频率55 Hz使试样的最大吸氢量增大了65%, 放电容量衰减率减小了61%;与1 830℃相比, 浇注温度1 920℃使试样的最大吸氢量增大了71%, 放电容量衰减率减小了63%。试样的储氢性能和电化学循环性能随超声振动频率和浇注温度增加而先提高后下降。V3Ti0.56Cr0.1Mo0.1钒基储氢电池合金的超声振动频率和浇注温度参数分别优选为55 Hz和1 920℃。
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关键词:
- 钒基储氢电池合金 /
- V3Ti0.56Cr0.1Mo0.1 /
- 超声铸造 /
- 储氢性能 /
- 电化学循环稳定性
Abstract: Ultrasonic casting of V3Ti0.56Cr0.1Mo0.1 vanadium-based hydrogen storage alloys was carried out at different ultrasonic vibration frequencies and pouring temperatures,and the hydrogen storage property and electrochemical cycling stability of the samples were tested and analyzed.The results show that compared with 95 Hz,ultrasonic vibration frequency at 55 Hz can increase the maximum hydrogen absorption of the sample by 65% and reduce the decay rate of discharge capacity by 61%.Compared with 1 830 ℃,pouring temperature at1 920 ℃ can increase the maximum hydrogen absorption of the sample by 71% and reduce the decay rate of discharge capacity by 63%.Both of the hydrogen storage property and electrochemical cycling stability of the samples first increase and then decline with increase of ultrasonic vibration frequency and pouring temperature.The optimized ultrasonic vibration frequency and pouring temperature of V3Ti0.56Cr0.1Mo0.1 vanadium-based hydrogen storage alloy are 55 Hz and 1 920 ℃,respectively.
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