Mg₂Ni전극의 충방전 특성

Electrochemical ChargeㆍDischarge Characteristics of Mg₂Ni Electrode

Mg₂Ni powder was heated up to 880˚C which is higher than the melting point of Mg₂Ni(760˚C) for 30 minutes and immediately cooled into water (14˚C). And then, mechanical ball milling was conducted for 1,4,8,10,12,24 hours. As milling time increased, discharge capacity increased to maximum of 700mAh/g at 12hours and then decreased with further milling. Praseodymium (0,0.2,0.5,0.7,1.Owt%) was added to Mg₂Ni powder. These alloys were ground for 12 hours to investigate charge. discharge characteristics and cycle life. The cycle life was remarkably improved with increasing the amount of Pr. The optimum amount of Pr was 0.7 weight percent.