Hydrogenation properties of(V_(0.85)Fe_(0.15))_(100-x)M_(x)-Ce BCC solid solution alloys with M=Cr,Mo,Al  

作　　者：Yuan-Fang Wu Li-Jun Jiang Wang Zhao Xiu-Mei Guo Xu-Shan Zhao Zhi-Nian Li Xiao-Peng Liu Shu-Mao Wang 

机构地区：[1]Institute of Energy Materials and Technology,General Research Institute for Nonferrous Metals,Beijing,100088,China

出　　处：《Rare Metals》2023年第1期313-319,共7页稀有金属（英文版）

基　　金：financially supported by the National High Technology Research and Development Program of China (No.2012AA051503)。

摘　　要：The structure and hydrogenation properties of (V_(0.85)Fe_(0.15))_(100-x)M_(x)-Ce(x=0,1,3,5;at%) alloys with M=Cr,Mo,Al were investigated.All the alloys show the same phase composition consisting of BCC matric and CeO_(2)phases which distribute along the grain boundary.The hydrogen capacities of (V_(0.85)Fe_(0.15))_(100-x)M_(x)-Ce change little with M,and none of them exceeds 2.0 wt%.But the plateau pressure shows remarkable linearly variation with the amount of M and the lattice parameter of BCC matric.The additions of Cr,Mo and A1 raise the plateau,but the linear relation of plateau versus BCC lattice parameter of Mo/Al-added alloys is opposite to that of Cr-added alloys and many other conventional hydrogen storage alloys.The radius of hydrogen site is introduced to explain the inconsistent.The plateau pressure of (V_(0.85)Fe_(0.15))_(100-x)M_(x)-Ce with any kind of M added increases with the contraction of the hydrogen site.The plateau pressure of (V_(0.85)Fe_(0.15))_(100-x)M_(x)-Ce can also be reflected by the stability of hydride which is judged by the enthalpy change during the dehydrogenation.

关 键 词：V-Fe alloy Hydride decomposition enthalpy Plateau pressure Hydrogen site Stability of hydride 

分 类 号：TG146.414[一般工业技术—材料科学与工程]