摘要
采用机械球磨方法制备了MlNi_(3.55)Co_(0.75)Mn_(0.4)Al_(0.3)+x%VFe(质量分数,x=5,10,15,20)储氢合金,研究了合金晶体结构和电化学性能。微结构分析表明,主相AB_(5)晶胞参数a及体积V随球磨时间增加而增加。电化学研究表明,合金的最大容量C_(max)及氢扩散系数D随x增加先增加后减少,x=10时达到最大值,分别为310 mAh/g和7.6×10^(−11) cm^(2)/s。对合金进行了循环稳定性测试,结果表明,MlNi_(3.55)Co_(0.75)Mn_(0.4)Al_(0.3)+10%VFe球磨10 h的合金在100次循环后放电容量保持率为98%。
The MlNi_(3.55)Co_(0.75)Mn_(0.4)Al_(0.3)+x%VFe(x=5,10,15,20)composite hydrogen storage alloys were synthesized by mechanical ball-milling.The microstructure and electrochemical properties of the composites were investigated.The microstructure analysis indicates that the parameters a and V of the main phase increase with the increase of milling time.The electrochemical analysis indicates that,with increasing VFe content x,the maximum capacity C_(max) and the hydrogen diffusion coefficient D of the alloy first increase and then decrease,and reach the maximum of 310 mAh/g and 7.6×10^(−11) cm^(2)/s with x=10.The cycle stability test was carried out on the alloy,and the results show that the discharge capacity retention rate of MlNi_(3.55)Co_(0.75)Mn_(0.4)Al_(0.3)+x%VFe ball-milled for 10 h was 98%after 100 cycles.
作者
李丽荣
Li Lirong(School of Science,Inner Mongolia of Science and Technology,Baotou 014010,Inner Mongolia,China)
出处
《钢铁钒钛》
CAS
北大核心
2022年第4期48-54,共7页
Iron Steel Vanadium Titanium
基金
国家自然科学基金资助项目(51961032)
内蒙古自然科学基金分析测试专项(2022FX02)。
作者简介
李丽荣(1983-),女,内蒙古乌兰察布人,副教授,主要从事储氢材料研究,E-mail:nmg0809@163.com。
