摘要
采用较为低廉的二氧化钒、二氧化钛,通过自蔓延高温合成法,进行了动力汽车电池用新型钒基储氢合金V3Ti Ni0.56Sr0.1制备,并进行了显微组织、物相组成和电化学性能的测试。结果表明,自蔓延高温合成法制备出的该新型合金组织细小、均匀,由绝大部分的钒基固溶体相和少量的Ti Ni相、Ti2Ni相组成,其放电容量在第2次充放电循环时达到最大值584 m Ah/g;合金经30次充放电循环后,其放电容量仍能达到214 m Ah/g;随放电电流从100 m A/g增大至1000 m A/g,该合金的放电容量减少。
The new vanadium-based hydrogen storage alloy for hybrid vehicle battery was prepared with cheaper vanadium dioxide and titanium dioxide by self-propagating high-temperature synthesis, and the microstructure, phase composition and electrochemical properties of the samples were tested. The results show that the grain size of new alloy is fine and the microstructure of the sample is homogeneous. It is composed of majority vanadium-based solid solution phase and small content of TiNi phase and Ti2Ni phase. Besides, the discharge capacity could reach a maximum of 584 mAh/g at the secondary time, and the discharge capacity could remain 214 mAh/g after thirty cycle times. Moreover, the discharge capacity of the alloy can just decrease by 12.61% with the discharge current increasing from 100mA/g to 1000mA/g.
出处
《热加工工艺》
CSCD
北大核心
2014年第24期80-82,86,共4页
Hot Working Technology
