Organic-inorganic perovskite (ABX3) solar cells (PSCs) have attracted wide interest in recent years (1)The power conversion efficiency (PCE) has increased up to 23.7%(NREL Best Research-Cell Efficiency Chart, https://...Organic-inorganic perovskite (ABX3) solar cells (PSCs) have attracted wide interest in recent years (1)The power conversion efficiency (PCE) has increased up to 23.7%(NREL Best Research-Cell Efficiency Chart, https://www.nrel.gov/pv/cell-efficiency.html.展开更多
The bulk amorphous alloy Mg_(60)Ni_(23.6)Y_(0.5)La_(15.9)was prepared by copper-mold inject casting.Its microstructural transformation and electrochemical properties were investigated.The microstructures of Mg_(60)Ni_...The bulk amorphous alloy Mg_(60)Ni_(23.6)Y_(0.5)La_(15.9)was prepared by copper-mold inject casting.Its microstructural transformation and electrochemical properties were investigated.The microstructures of Mg_(60)Ni_(23.6)Y_(0.5)La_(15.9)amorphous alloy during charge and discharge cycling were characterized by XRD and SEM.The electrochemical performances of the alloy were tested by an automatic charge and discharge apparatus.The results show that the amorphous structure transforms into crystallized one step by step and Mg_(2)NiH_(4),Mg_(2)Ni and Mg(OH)_(2)phases are formed gradually during the process of hydrogenation and dehydrogenation.Furthermore,the result of electrochemical characteristics testing shows that the change process of discharge capacity for Mg_(60)Ni_(23.6)Y_(0.5)La_(15.9)amorphous alloy can be divided into four stages and the highest discharge capacity reaches 410.5 mAh/g.It is found that the amorphous structure may be a critical factor to obtain the maximum discharge capacity.展开更多
基金the National Key Research and Development Program of China (2017YFA0206600)the National Natural Science Foundation of China (51773045, 21572041 and 21772030) for financial support
文摘Organic-inorganic perovskite (ABX3) solar cells (PSCs) have attracted wide interest in recent years (1)The power conversion efficiency (PCE) has increased up to 23.7%(NREL Best Research-Cell Efficiency Chart, https://www.nrel.gov/pv/cell-efficiency.html.
基金National Natural Science Foundation of China(50972066)
文摘The bulk amorphous alloy Mg_(60)Ni_(23.6)Y_(0.5)La_(15.9)was prepared by copper-mold inject casting.Its microstructural transformation and electrochemical properties were investigated.The microstructures of Mg_(60)Ni_(23.6)Y_(0.5)La_(15.9)amorphous alloy during charge and discharge cycling were characterized by XRD and SEM.The electrochemical performances of the alloy were tested by an automatic charge and discharge apparatus.The results show that the amorphous structure transforms into crystallized one step by step and Mg_(2)NiH_(4),Mg_(2)Ni and Mg(OH)_(2)phases are formed gradually during the process of hydrogenation and dehydrogenation.Furthermore,the result of electrochemical characteristics testing shows that the change process of discharge capacity for Mg_(60)Ni_(23.6)Y_(0.5)La_(15.9)amorphous alloy can be divided into four stages and the highest discharge capacity reaches 410.5 mAh/g.It is found that the amorphous structure may be a critical factor to obtain the maximum discharge capacity.
