Effect of Preparation Method on Properties of TiNi Hydrogen Storage Electrode Alloy
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摘要: 为了提高TiNi储氢电极合金的性能,分别采用四种不同的工艺制备了TiNi储氢电极合金,并进行了循环稳定性与电化学腐蚀性能的测试与分析。结果表明:与常规感应熔炼相比,真空感应熔炼、机械振动辅助真空感应熔炼和超声振动辅助真空感应熔炼制备方法使TiNi储氢电极合金的放电容量衰减率分别减小34%、48%和65%,腐蚀电位分别正移了92、141和173 mV。真空感应熔炼、机械振动辅助真空感应熔炼和超声振动辅助真空感应熔炼制备方法有利于改善TiNi储氢电极合金的循环稳定性和电化学腐蚀性能,其中以超声振动辅助真空感应熔炼最佳。TiNi储氢电极合金的制备方法应优选超声振动辅助真空感应熔炼。
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关键词:
- TiNi储氢电极合金 /
- 制备方法 /
- 循环稳定性 /
- 电化学腐蚀性
Abstract: TiNi hydrogen storage electrode alloy was prepared respectively by four methods to improve its properties,and the cycling stability and electrochemical corrosion resistance of the alloys obtained were tested and analyzed.The results show that compared with the conventional induction melting,the vacuum induction melting,mechanical vibration assisted vacuum induction melting and ultrasonic vibration assisted vacuum induction melting can reduce the discharge capacity decay rate of the TiNi alloy separately by 34%,48% and 65%,and make the corrosion potential positively shift by 92,141 and 173 mV,respectively.The vacuum induction melting,mechanical vibration assisted vacuum induction melting and ultrasonic vibration assisted vacuum induction melting can help to improve the cycling stability and electrochemical corrosion resistance of the TiNi hydrogen storage electrode alloy,of which ultrasonic vibration assisted vacuum induction melting is the best and determined as the optimum preparation method for TiNi hydrogen storage electrode alloy. -
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