锻压技术

锻造温度对新能源汽车电池镁基贮氢合金性能的影响

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

作者：张慧丽1 2 周正南3

单位：（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）

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

出版年,卷(期):页码：2024,49(2):31-36

摘要：

为了研究锻造温度对Mg0.9V0.1Ni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Mg0.9V0.1Ni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Mg0.9V0.1Ni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Mg0.9V0.1Ni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 Mg0.9V0.1Ni magnesium-based hydrogen storage alloy, the Mg0.9V0.1Ni 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 analyzed. The results, show that forging can significantly reduce the decay rate of discharge capacity for Mg0.9V0.1Ni magnesium-based hydrogen storage alloys,promote the positive shift of corrosion potential for hydrogen storage alloys, and significantly improve the charge-discharge cycle stability and corrosion resistance of hydrogen storage alloys. Compared with the unforged hydrogen storage alloy, the discharge capacity decay rate of Mg0.9V0.1Ni 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.

基金项目：

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)

张慧丽（1978-），女，硕士，副教授

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