论文部分内容阅读
采用超声振动辅助感应熔炼法,制备出Mg1.8V0.2Ni0.95Co0.05新型镁基储氢合金,并进行了显微组织、XRD、吸放氢性能和电化学循环稳定性的分析。结果表明,该新型合金具有较佳吸放氢性能和充放电循环稳定性,由Mg2Ni基体相和少量弥散分布的V3Ni相组成,最大吸氢量达到2.3wt%,放氢平台压力约为0.6 MPa。与Mg2Ni合金相比,该新型合金经20次充放电循环后的放电容量衰减率减小了72.3%。
A new Mg1.8V0.2Ni0.95Co0.05 Mg-based hydrogen storage alloy was prepared by ultrasonic vibration assisted induction melting method, and the microstructure, XRD, hydrogen absorption and desorption properties and electrochemical cycling stability were analyzed. The results show that the new alloy has better hydrogen absorption and desorption performance and charge-discharge cycle stability. It consists of Mg2Ni matrix phase and a small amount of dispersed V3Ni phase. The maximum hydrogen absorption reaches 2.3wt% and the pressure of the hydrogen releasing platform is about 0.6MPa . Compared with Mg2Ni alloy, the decay rate of discharge capacity of this new alloy after 72 cycles of charging and discharging was reduced by 72.3%.