Effect of Schiff Base on Electrochemical Properties of La-Mg-Ni-based Hydrogen Storage Alloy

doi:10.11944/j.issn.1000-0518.2016.07.150363

Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (7): 813-819.DOI: 10.11944/j.issn.1000-0518.2016.07.150363

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Effect of Schiff Base on Electrochemical Properties of La-Mg-Ni-based Hydrogen Storage Alloy

WANG Xinying,HUANG Hongxia(),XIE Wenqiang,KONG Xiangfei,YU Wenwan

Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials,Guilin University of Technology,Guilin,Guangxi 541004,China

Received:2015-10-14 Accepted:2016-01-12 Published:2016-06-30 Online:2016-06-30
Contact: HUANG Hongxia
Supported by:
Supported by the National Natural Science Foundation of China(No.NSFC11364013)

Abstract

Abstract:

To improve the electrochemical properties of La-Mg-Ni-based hydrogen storage alloy La_0.73Ce_0.18Mg_0.09Ni_3.20Al_0.21Mn_0.10Co_0.60, a kind of Schiff base was synthesized and added to the alloy as a surface modifier. According to the results of UV and infrared spectroscopies, the phase structure of the alloy does not change after adding this Schiff base. Compared with the original alloy, the maximum discharge capacity decreases somewaht. The cycle stability of the alloy electrodes with 5% addition of Schiff base is improved from original 63% to 75% after 50 cycles, and the high rate discharge performance is improved also. After surface treatment, the exchange current density I₀ and the limiting current density I_L increases obviously. The potentiodynamic polarization curves of the alloy electrodes indicate that the corrosion resistance is increased. The results above suggest that the addition of small amount of Schiff base contributes to improving the electrochemical properties of the hydrogen storage alloy.

Key words: Schiff base, hydrogen storage alloy, electrochemical properties

WANG Xinying, HUANG Hongxia, XIE Wenqiang, KONG Xiangfei, YU Wenwan. Effect of Schiff Base on Electrochemical Properties of La-Mg-Ni-based Hydrogen Storage Alloy[J]. Chinese Journal of Applied Chemistry, 2016, 33(7): 813-819.

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Effect of Schiff Base on Electrochemical Properties of La-Mg-Ni-based Hydrogen Storage Alloy

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