Effect of Cu on dehydrogenation and thermal stability of amorphous
Mg-Ce-Ni-Cu alloys |
| |
| Authors: | Chi Zhang Hui Wang Liu-Zhang Ouyang Huai-Jun Lin and Min Zhu |
| |
| Institution: | School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of
Technology, Guangzhou 510641, China,School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of
Technology, Guangzhou 510641, China,School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of
Technology, Guangzhou 510641, China,School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of
Technology, Guangzhou 510641, China and School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of
Technology, Guangzhou 510641, China |
| |
| Abstract: | The alloying element component is very crucial in improving the hydrogen storage performance of amorphous alloys.In this work,quaternary amorphous Mg_(70-x)Ce_(10)Ni_(20)Cu_x(x=3,7.5,10)alloys were prepared by meltspinning and the effect of Cu on hydrogenation and dehydrogenation were investigated in comparison with the Mg_(70-x)Ce_(10)Ni_(20)amorphous alloys.The initial hydrogenation kinetics of amorphous Mg_(70-x)Ce_(10)Ni_(20)Cu_x(x=0,3,7.5,10)was improved with the increase of Cu content according to the kinetics measured at a temperature below crystallization temperature.As hydrogen is absorbed,an amorphous-amorphous transition occurred,and relatively high Cu content would lead to phase separation in the hydrogenation process.Amorphous phase have much higher crystallization temperature after it absorbs hydrogen and the addition of Cu could increase the crystallization activation energy of amorphous hydrides.In addition,the increase of Cu content could reduce the dehydrogenation temperature of amorphous hydrides,which gives a significant indication for future improving research of the hydrogen desorption performance of Mg based amorphous hydrides. |
| |
| Keywords: | Hydrogen storage
Mg-based amorphous alloy
Hydrogenation kinetic
Dehydrogenation temperature |
| 本文献已被 CNKI ScienceDirect 等数据库收录！ |
| 点击此处可从《自然科学进展(英文版)》浏览原始摘要信息 |
| 点击此处可从《自然科学进展(英文版)》下载免费的PDF全文 |
|
