کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1274313 | 1497638 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of surface treatments on microstructure and electrochemical properties of La-Ni-Al hydrogen storage alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of surface treatments on microstructure and electrochemical properties of La-Ni-Al hydrogen storage alloy Effect of surface treatments on microstructure and electrochemical properties of La-Ni-Al hydrogen storage alloy](/preview/png/1274313.png)
چکیده انگلیسی
Surface treatment by the fluorination treatment with an aqueous solution of KF and HF with a little addition of KBH4 followed by electroless Ni-P plating has been carried out to modify the surface structure and electrochemical properties of the La-Ni-Al hydrogen storage alloy. The results of scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) show that a Ni-rich and Al-poor layer forms after fluorination treatment. The electroless plating results in the precipitation of the nanometer-scale Ni-P particles with homogeneous distribution on the alloy surface. Both the treatments contribute to an increase in exchange current density, a decrease in charge-transfer resistance and the facility of hydrogen diffusion within the bulk alloy, leading to significant improvements on high rate dischargeability (HRD) of the alloy. The alloy treated by the composite treatment of the fluorination treatment and the following electroless plating possesses best overall electrode performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 34, Issue 4, February 2009, Pages 1904-1909
Journal: International Journal of Hydrogen Energy - Volume 34, Issue 4, February 2009, Pages 1904-1909
نویسندگان
Xiangyu Zhao, Liqun Ma, Yujun Gao, Yi Ding, Xiaodong Shen,