Effect of Preparation Method on the Electrochemical Performances of Vanadium-titanium Hydrogen Storage Alloy
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摘要: 为了提高钒钛储氢合金电化学性能, 采用不同的铸造工艺制备了钒钛储氢合金试样, 并进行了电化学腐蚀性能和电化学循环稳定性的测试与分析。结果表明:与常规铸造的优化工艺相比, 超声铸造工艺使试样的腐蚀电位正移0.125 V, 放电容量衰减率减小29%, 电化学腐蚀性能和电化学循环稳定性均得到显著提高。钒钛储氢合金的铸造工艺优选超声铸造工艺。Abstract: For improving the electrochemical performances of vanadium-titanium hydrogen storage alloy,vanadium-titanium hydrogen storage alloys were prepared by various casting processes,and the electrochemical corrosion resistance and electrochemical cycling stability were tested and analyzed. The results show that compared with the optimized process of conventional casting,ultrasonic casting process can make the corrosion potential of the sample positively shift by 0. 125 V and the discharge capacity decay rate decrease by 29 %,respectively.Both the electrochemical corrosion resistance and electrochemical cycling stability of the alloy were greatly improved. The vanadium-titanium hydrogen storage alloy was optimized by ultrasonic casting process.
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