汽车电池负极镁基合金Mg-Ni-Y-Gd的组织与性能

Microstructure and Properties of Mg-Based Alloy Mg-Ni-Y-Gd for Automotive Battery Anode

针对目前汽车电池存在续航不足、放电不稳定等问题,采用不同的球磨工艺制备了MgNi-Y-Gd和Mg2Ni汽车电池负极镁基合金,并对其组织、放电性能和耐腐蚀性能进行了测试与分析。结果表明:在500 r/min下球磨48 h后两种合金都是非晶合金。与Mg2Ni相比,Mg-Ni-YGd合金腐蚀电位正移53 mV,充放电循环25次后放电容量减小13.5%,合金的耐腐蚀性能和放电性能得到明显提高。

In view of the current problems of insufficient battery life and unstable discharge,Mg-based alloys for anode of automotive batteries such as Mg-Ni-Y-Gd and Mg2Ni were prepared by different ball milling process and the microstructure,discharge performance and corrosion resistance were tested and analyzed. The results showed that the two alloys were amorphous alloys after 500 r/min ball milling for 48 h. Compared with Mg2Ni alloy,the corrosion potential of Mg-Ni-Y-Gd alloy was shifted by 53 mV positively,and the discharge capacity was decreased by 13.5 % after 25 cycles of charge-discharge. The corrosion resistance and discharge performance of Mg-Ni-Y-Gd alloy were obviously improved.