| Study on Diffusion of Hydrogen in AB_5 Non-Stoichiometric Hydrogen Absorbing Alloys |
| |
| 引用本文： | 王志兴,李新海,陈启元,彭文杰,郭华军. Study on Diffusion of Hydrogen in AB_5 Non-Stoichiometric Hydrogen Absorbing Alloys[J]. 中国稀土学报(英文版), 2003, 0(6) |
| |
| 作者姓名： | 王志兴 李新海 陈启元 彭文杰 郭华军 |
| |
| 作者单位： | Department of Metallurgical Physico-Chemistry，School of Metallurgical Science and Engineering，Central South University，Department of Metallurgical Physico-Chemistry，School of Metallurgical Science and Engineering，Central South University，Department of Metallurgical Physico-Chemistry，School of Metallurgical Science and Engineering，Central South University，Department of Metallurgical Physico-Chemistry，School of Metallurgical Science and Engineering，Central South University，Department of Metallurgical Physico-Chemistry，School of Metallurgical Science and Engineering，Central South University Changsha 410083，China，Changsha 410083，China，Changsha 410083，China，Changsha 410083，China，Changsha 410083，China |
| |
| 摘 要： | AB5hydrogenabsorbingalloyshavebeenexten sivelyusedontheproductionofnickelmetallichy dridebatteriesbecauseoftheirexcellentperformancesastheactivematerialsofnegatives .Ithasbeenshownthatnonstoichiometrichydrogenabsorbingalloyshavethegreatratecapability ,andthecyclinglifeisim provedbythepartialsubstitutionofSnforNiinLaNi5[1～ 3] .Inordertoobtainspecialhydrogenab sorbingalloyswithhighratecapabilityandrelativelowprice ,someAB5nonstoichiometrichydrogenabsorbingalloysareexplored ,whichisbasedonthes…
|
Study on Diffusion of Hydrogen in AB_5 Non-Stoichiometric Hydrogen Absorbing Alloys |
| |
| Wang Zhixing ,Li Xinhai,Chen Qiyuan,Peng Wenjie,Guo Huajun. Study on Diffusion of Hydrogen in AB_5 Non-Stoichiometric Hydrogen Absorbing Alloys[J]. Journal of Rare Earths, 2003, 0(6) |
| |
| Authors: | Wang Zhixing Li Xinhai Chen Qiyuan Peng Wenjie Guo Huajun |
| |
| Affiliation: | Wang Zhixing ~*,Li Xinhai,Chen Qiyuan,Peng Wenjie,Guo Huajun |
| |
| Abstract: | The diffusion coefficient of hydrogen atoms in the studied alloys was electrochemically measured by chronoamperometry when the metallic hydride microelectrodes were completely discharged. It is found that the diffusion coefficient of hydrogen atoms decreases when cobalt is substituted for a minority of nickel. On the contrary, the diffusion coefficient increases with the partial substitution of manganese or aluminum for nickel, which is related to the lattice constant and cell volumes of hydrogen absorbing alloys. The lattice constant c is obviously affected by the substitute elements greatly. The result shows that the expansion of cell volume resulted from the increase of value c causes the increase of diffusion coefficient which is especially obvious when the lattice constant is relatively low. However, this relationship is not clear if the lattice constant increases to some extent. It is suggested that this phenomenon is related to the interaction of hydrogen atoms with metallic atoms. |
| |
| Keywords: | hydrogen absorbing alloy diffusion nonstoichiometry electrochemistry |
| 本文献已被 CNKI 等数据库收录！ |
