铜模铸造钒基贮氢合金的电化学性能研究  

Research on Electrochemical Properties of Vanadium-based Hydrogen Storage Alloy by Casting with Copper Mould

作　　者：郑彬[1] 

机构地区：[1]山东理工大学,山东淄博255000

出　　处：《热加工工艺》2015年第1期66-68,共3页Hot Working Technology

基　　金：国家自然科学基金项目(51807034);山东省自然科学基金项目(ZW2011EEQ025)

摘　　要：采用铜模铸造法制备了V3TiNi0.56Co0.3钒基贮氢合金,并进行物相组成、显微组织、电化学腐蚀性能和电化学循环稳定性能的测试与对比分析。结果表明,铜模铸造制备的V3Ti Ni0.56Co0.3钒基贮氢合金为非晶合金,显著改善了合金的电化学腐蚀性能和电化学循环稳定性能。与常规铸造相比,铜模铸造使其腐蚀电位正移389 m V、最大放电容量增大19.96%、充放电循环20次后的放电容量下降率从96.93%减小至40.22%。VaTiNi0.56Co0.3 vanadium-based hydrogen storage alloy was prepared by casting with copper mould, and the phase composition, microstructure, electrochemical corrosion resistance and electrochemical cycling stability of the alloy were tested. The results show that V3TiNi0.56Co0.3 vanadium-based hydrogen storage alloy prepared by casting with copper mould is amorphous alloy, which can greatly improve the electrochemical corrosion resistance and electrochemical cycling stability of the alloy. Compared with common casting, the casting with copper mould could change corrosion potential of the alloy from 389mV to positive direction, and make the maximum discharge capacity of the alloy increase by 19.96%, and make the discharge capacity of the alloy after charge/discharge cycle for 20 times decrease from 96.93% to 40.22%.

关 键 词：钒基贮氢合金 铜模铸造 电化学腐蚀性能 电化学循环稳定性能 非晶合金 

分 类 号：TG139.7[一般工业技术—材料科学与工程] TG249.3[金属学及工艺—合金]