摘要
采用自蔓延高温合成法制备了添加不同含量合金元素Al或Cr的新型钒基新能源汽车电池负极合金V65Ti20Ni15,并进行了显微组织、电化学循环稳定性和耐腐蚀性能的测试与分析。结果表明,合金元素Al或Cr,有助于改善合金内部组织,提高合金的电化学循环稳定性和耐腐蚀性能;复合添加合金元素Cr和Al的V59Ti20Ni15Al3Cr3合金的电化学循环稳定性和耐腐蚀性能最佳。与不添加合金元素的V65Ti20Ni15合金相比,复合添加合金元素Cr和Al的V59Ti20Ni15Al3Cr3合金的充放电循环50次后放电容量衰减率从85%减小到23%、腐蚀电位正移692 mV,合金的电化学循环稳定性和耐腐蚀性能得到显著提高。
A new vanadium based negative electrode alloy V65Ti20Ni15 for automotive batteries was prepared by self propagating high temperature synthesis(SHS)with different contents of Al or Cr.The microstructure,electrochemical cycle stability and corrosion resistance of the alloy were tested and analyzed.The results show that Al or Cr is helpful to improve the internal structure,electrochemical cycle stability and corrosion resistance of the alloy.The best electrochemical cycle stability and corrosion resistance can be obtained for V59Ti20Ni15Al3Cr3 alloy with Cr and Al added.Compared with the V65 Ti20 Ni15 alloy without alloying elements,the discharge capacity decay rate of V59Ti20-Ni15Al3Cr3 alloy with alloying elements Cr and Al is reduced from 85%to 23%after 50 charge-discharge cycles,with the corrosion potential shifted forward by 692 mV.The electrochemical cycle stability and corrosion resistance of the alloy are significantly improved.
作者
冯竞祥
罗瑜清
曹立祥
Feng Jingxiang;Luo Yuqing;Cao Lixiang(School of Automotive Engineering,College of Foshan Polytechnic,Foshan 528137,Guangdong,China;Guangdong Polytechnic of Environment Protection Engineering,Foshan 528216,Guangdong,China;School of Materials and Energy,Southwest University,Chongqing 400715,China)
出处
《钢铁钒钛》
CAS
北大核心
2021年第3期94-98,共5页
Iron Steel Vanadium Titanium
基金
广东省普通高校重点科研平台和科研项目青年创新人才类项目“(编号:2018GkQNCX054)”。
