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자료유형
학술저널
저자정보
저널정보
한국수소및신에너지학회 한국수소및신에너지학회논문집 수소에너지 제11권 제4호
발행연도
2000.12
수록면
189 - 202 (14page)

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AB<sub>2</sub> type Zr-based Laves phases alloys have been studied for potential application as a negative electrode in a Ni-MH battery. The AB<sub>2</sub>-type electrodes have a much higher energy density than AB<sub>5</sub>-type electrodes per weight, however they have some disadvantages such as poor activation behavior and cycle life etc. Nonetheless, the AB<sub>2</sub>-type electrodes have been studied very extensively due to their high energy density. In this study, in order to develop the cycle life, the Mn of AB<sub>2</sub> alloy composition was substituted partially by Mo. The alloys were melted by arc furnace and remelted 4-5 times for homogeneity. The alloy powder was used below 200-325 mesh for experiments. The structures and phases of the alloys were analyzed by XRD, SEM and EDS, and measured the curve of a pressure-composition isotherms. The electrodes were prepared by cold pressing of the copper-coated(25 wt%) alloy powders, and tested by a half cell. The results are summarized as follows. The cycle life was improved with the increase of Mo amount inZr<sub>1-x</sub>Ti<sub>x</sub>V<sub>0.4</sub>Ni<sub>1.2</sub>Mn<sub>0.4-y</sub>Mo<sub>y</sub> (x=0.3, 0.4) and the activation was faster, whereas the discharge capacity decreased.

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