Electrochemical hydrogen storage performance of AB_(5-)CoB composites synthesized by a simple mixing method  

作　　者：SONG Dawei WANG Yijing WANG Yaping JIAO Lifang YUAN Huatang 

机构地区：[1]Institute of New Energy Material Chemistry, Engineering Research Center of Energy Storage ＆ Conversion （Ministry of Education of China）, and Key Laboratory of En-ergy-Material Chemistry （Tianjin）, Nankai University, Tianjin 300071, China

出　　处：《Rare Metals》2009年第6期629-632,共4页稀有金属（英文版）

基　　金：supported by the National High-Tech Research and Development Program of China (Nos.2007AA05Z149 and 2007AA05Z108);the Major State Basic Research Development Program of China (No.2010CB631303);the National Natural Science Foundation of China (Nos.50631020,50701025,and 50971071);the Doctoral Foundation of the Ministry of Education of China (No.20070055064);the Natural Science Foundation of Tianjin,China (No.07JCYBJC03500)

摘　　要：AB5 （MlNi4.0Al0.3Cu0.5Zn0.2） alloy and CoB alloy were prepared by arc melting. AB5-CoB composites were synthesized by simple mixing of AB5 alloy powders and CoB alloy powders, and their electrochemical hydrogen storage properties were studied as negative electrodes in KOH aqueous solution. The maximum discharge capacity of the AB5-CoB（50%） composite （the content of CoB in the composite is 50 wt.%） reached 365.3 mAh.g^-1. After 100 charge-discharge cycles, the discharge capacity of the AB5-CoB（50%） composite was still much higher than that of the AB5 alloy. The high rate discharge capability （HRD） and potentiodynamic polarization were also tested.AB5 （MlNi4.0Al0.3Cu0.5Zn0.2） alloy and CoB alloy were prepared by arc melting. AB5-CoB composites were synthesized by simple mixing of AB5 alloy powders and CoB alloy powders, and their electrochemical hydrogen storage properties were studied as negative electrodes in KOH aqueous solution. The maximum discharge capacity of the AB5-CoB（50%） composite （the content of CoB in the composite is 50 wt.%） reached 365.3 mAh.g^-1. After 100 charge-discharge cycles, the discharge capacity of the AB5-CoB（50%） composite was still much higher than that of the AB5 alloy. The high rate discharge capability （HRD） and potentiodynamic polarization were also tested.

关 键 词：composite materials powder metallurgy electrochemical techniques electrochemical properties 

分 类 号：TG139.7[一般工业技术—材料科学与工程] TB33[金属学及工艺—合金]