Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 605, Issue -, Pages 51-55Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.03.181
Keywords
LaNi5 hydrogen storage alloy; Surface modification; Electrochemical performance; CuCl; Cu2O
Categories
Funding
- Department of Science and Technology, Jiangsu Province [BY2013073-03]
- Department of Education for the Fundamental Research Funds for the Central Universities, Jiangsu Province [CXLX12_0105]
- Analytical Test Fund of Southeast University [201226]
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The LaNi5 hydrogen storage alloy is modified by two steps: firstly, the alloy is treated with an aqueous solution of HF and KF.2H(2)O, then the as-obtained product reacts with CuCl in aqueous media at 30 degrees C, 50 degrees C and 70 degrees C respectively. XRD and SEM show that the samples obtained at 50 degrees C and 70 degrees C contain Cu and Cu2O, and their particles are evenly distributed on the alloy surface. The electrochemical properties of the alloy treated with 12.5 wt.% of the alloy at 50 degrees C are the best, which discharge 310 mA h g (1) at a current density of 50 mA g(-1), and 280 mA h g(-1) at 1000 mA g(-1), while the pristine alloy discharges only 290 mA h g(-1) at a current density of 50 mA g(-1), and 180 mA h g(-1) at 1000 mA g(-1). (C) 2014 Elsevier B.V. All rights reserved.
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