锻造温度对新能源汽车电池镁基贮氢合金性能的影响  

Influence of forging temperature on performance of magnesium-based hydrogen storage alloys for new energy vehicle battery

作　　者：张慧丽 周正南[3] Zhang Huili;Zhou Zhengnan(Henan Power Plant Energy Conservation and Environmental Protection Engineering Technology Research Center,Zhengzhou 450000,China;Dept of Academic Research,Zhengzhou Electric Power College,Zhengzhou 450000,China;Department of Mechanical Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]河南省电厂节能环保工程技术研究中心,河南郑州450000 [2]郑州电力高等专科学校科研处,河南郑州450000 [3]重庆大学机械工程学院,重庆400044

出　　处：《锻压技术》2024年第2期31-36,共6页Forging & Stamping Technology

基　　金：郑州电力高等专科学校2023年度科研项目(ZEPCKY-2023-02);2024年度河南省科技攻关项目;河南省高等学校重点科研项目(22B480005)。

摘　　要：为了研究锻造温度对Mg_(0.9)V_(0.1)Ni镁基贮氢合金充放电循环稳定性和耐腐蚀性能的影响,采用不同的始锻温度和终锻温度对机械球磨-压片-烧结三步法制备的Mg_(0.9)V_(0.1)Ni镁基贮氢合金试样进行锻造试验,并对合金试样的充放电循环稳定性和室温耐腐蚀性能进行了测试和对比分析。结果表明:锻造可以明显降低Mg_(0.9)V_(0.1)Ni镁基贮氢合金的放电容量衰减率,促使贮氢合金腐蚀电位正移,明显改善贮氢合金的充放电循环稳定性和耐腐蚀性能;与未锻造的贮氢合金相比,在始锻温度为400℃、终锻温度为310℃下制备的Mg_(0.9)V_(0.1)Ni镁基贮氢合金,其放电容量衰减率降低了35.68%、腐蚀电位正移了114 mV,综合性能最优。In order to investigate the influence of forging temperature on the charge-discharge cycle stability and corrosion resistance of Mg_(0.9)V_(0.1)Ni magnesium-based hydrogen storage alloy,the Mg_(0.9)V_(0.1)Ni magnesium-based hydrogen storage alloy specimens prepared by the three-step method of mechanical ball milling,tableting and sintering were forged under different initial and final forging temperatures,and the charge-discharge cycle stability and corrosion resistance at room temperature of alloy specimens were tested and comparatively ana-lyzed.The results,show that forging can significantly reduce the decay rate of discharge capacity for Mg_(0.9)V_(0.1)Ni magnesium-based hydro-gen storage alloys,promote the positive shift of corrosion potential for hydrogen storage alloys,and significantly improve the charge-dis-charge cycle stability and corrosion resistance of hydrogen storage alloys.Compared with the unforged hydrogen storage alloy,the dis-charge capacity decay rate of Mg_(0.9)V_(0.1)Ni magnesium-based hydrogen storage alloy prepared at the initial forging temperature of 400℃ and the final forging temperature of 310℃decreases by 35.68%,and the positive shift of corrosion potential is 114 mV,and the overall performance is optimal.

关 键 词：镁基贮氢合金 充放电循环稳定性能 始锻温度 终锻温度 耐腐蚀性能 

分 类 号：TH164[机械工程—机械制造及自动化]