Study on self-discharge property of Nd0.88Mg0.12Ni3.10+xAl0.20 (x = 0.00, 0.10, 0.20, 0.30) hydrogen storage alloys
Study on self-discharge property of Nd0.88Mg0.12Ni3.10+xAl0.20 (x = 0.00, 0.10, 0.20, 0.30) hydrogen storage alloys
复制标题
Nd0.88Mg0.12Ni3.10 xAl0.20(x=0.00、0.10、0.20、0.30)储氢合金自放电性能研究
DOI：
10.1016/j.jallcom.2009.12.159
复制
发表时间：
2010-03
影响因子：
6.2
通讯作者：
D.Y. Xie
中科院分区：
文献类型：
--
作者：
G.Y. Shang;Y. Li;S.M. Han;Y. Liu;X.L. Zhu;J.S. Hao;D.Y. Xie
Nd0.88Mg0.12Ni3.10 + xAl 0.20（x=0.00，0.10，0.20，0.30）合金通过感应熔融制备。通过结构表征、压力-组成-温度（P-C-T）测量和电化学测试评估了导致可逆和不可逆容量损失的因素。X射线衍射（XRD）分析表明，合金具有多相结构，主要由Nd 2Ni 7相、NdNi 5相和少量的NdNi 2相组成。FESEM观察到开路储存28 d后，合金颗粒表面形成了一些白色和针状物。XRD和EDS分析结果表明，产物为Mg（OH）2和Nd（OH）3。合金的氧化导致容量的不可逆损失，腐蚀速率Icorr随Ni含量的增加先减小后增大，在x=0.20时达到最低值。P-C-T测试表明，随着Ni含量的增加，氢化物的稳定性先增加后降低，在x=0.20时，自放电率最低。合金电极在318 K时的24 h荷电留存率（CRT）先从22.5%（x = 0.00）增加到82.1%（x=0.20），然后下降到33.2%（x=0.30）。
Nd0.88Mg0.12Ni3.10+xAl0.20(x=0.00, 0.10, 0.20, 0.30) alloys were prepared by inductive melting. The factors leading to reversible and irreversible loss of capacity were evaluated by structural characterization, pressure–composition–temperature (P–C–T) measurements, and electrochemical tests. X-ray diffraction (XRD) analysis showed that the alloys had a multiphase structure, consisting mainly of Nd2Ni7phase, NdNi5phase and some minor impurity NdNi2phase. The FESEM observed that some white and acicular substances were formed on surface of the alloy particles after 28 d storage under an open-circuit condition. XRD and EDS results revealed that the substances were Mg(OH)2and Nd(OH)3. The oxidation of alloys led to irreversible capacity loss, the corrosion rate characterized by Icorrfirst decreased and then increased with increasing Ni content, and reached its lowest value at x=0.20. P–C–T measurements indicated that with increasing Ni content the stability of the hydride first increased and then decreased, which resulted in the lowest self-discharge rate at x=0.20. The 24-h charge retention rate (CRT) of alloy electrodes increased first from 22.5% (x=0.00) to 82.1% (x=0.20), and then decreased to 33.2% (x=0.30) at 318K.
登录
查看更多内容
影响因子：
6.2
作者：
H. Pan;Yuanjian Yue;M. Gao;Xue-Xiang Wu;N. Chen;Y. Lei;Qidong Wang
通讯作者：
H. Pan;Yuanjian Yue;M. Gao;Xue-Xiang Wu;N. Chen;Y. Lei;Qidong Wang
影响因子：
6.2
作者：
Xiaofen Li;Hui-chao Dong;Ai-qiang Zhang;Yanwei Wei
通讯作者：
Xiaofen Li;Hui-chao Dong;Ai-qiang Zhang;Yanwei Wei
影响因子：
9.2
作者：
S. Yasuoka;Yoshifumi Magari;Tetsuyuki Murata;Tadayoshi Tanaka;J. Ishida;Hiroshi Nakamura;T. Nohma;Masaru Kihara;Y. Baba;Teraoka Hirohito
通讯作者：
S. Yasuoka;Yoshifumi Magari;Tetsuyuki Murata;Tadayoshi Tanaka;J. Ishida;Hiroshi Nakamura;T. Nohma;Masaru Kihara;Y. Baba;Teraoka Hirohito
影响因子：
6.2
作者：
F. Li;K. Young;T. Ouchi;M. Fetcenko
通讯作者：
F. Li;K. Young;T. Ouchi;M. Fetcenko
影响因子：
6.2
作者：
Ying Li;Y. Lei;Linshen Chen;G. Lu;Qiu-lin Wang
通讯作者：
Ying Li;Y. Lei;Linshen Chen;G. Lu;Qiu-lin Wang