金属酞菁对新型La-Mg-Ni基储氢合金表面处理研究  

Influence of metal phthalocyanine cobalt surface treatment on the new La-Mg-Ni-based hydrogen storage alloy

作　　者：王新颖[1] 黄红霞[1] 谢文强[1] 孔翔飞[1] 于文婉 

机构地区：[1]桂林理工大学广西电磁化学功能物质重点实验室,桂林541004

出　　处：《化工新型材料》2017年第6期182-184,共3页New Chemical Materials

基　　金：国家自然科学基金项目(NSFC11364013);广西自然科学基金项目(2016GXNSFAA380201)

摘　　要：为提高La-Mg-Ni基储氢合金La_(0.73)Ce_(0.18)Mg_(0.09)Ni_(3.20)Al_(0.21)Mn_(0.10)Co_(0.60)的电化学性能,合成四羧基酞菁钴对其进行表面处理。表面处理后,电极最大放电容量略有下降,但电极的循环稳定性和动力学性能提高。研究结果表明,添加2%四羧基酞菁钴制得的电极的电化学性能最佳,最大放电容量达到363mA·h/g,第50次循环时的放电容量为272mA·h/g,50次循环后的放电容量保持率为75%极限,电流密度为1359mA/g。添加四羧基酞菁钴后改善了储氢合金的综合电化学性能。Four carboxylic phthalocyanine cobalt was synthesized to improve the electrochemical performances of the new La-Mg-Ni-based hydrogen storage alloy La_（0.73）Ce_（0.18）Mg_（0.09）Ni_（3.20）Al_（0.21）Mn_（0.10）Co_（0.60）.After surface treatment,the maximum discharge capacity fell slightly.The addition of four carboxylic phthalocyanine cobalt had a positive effect on the cycle stability and kinetic performance.It shown that the electrode added 2% four carboxylic phthalocyanine cobalt presented the best electrochemical properties.The maximum discharge capacity reached up to 363mA·h/g and the discharge capacity at50 th cycle was 272mA·h/g.The capacity retention after 50 cycles was 75% and the limiting current density improved to1359mA/g.Compared with the untreated one,the comprehensive electrochemical properties of hydrogen storage alloy had improved.

关 键 词：四羧基酞菁钴 储氢合金 表面处理 

分 类 号：TG139.7[一般工业技术—材料科学与工程]