热处理工艺对Al—In—Mg—Sn—Ce阳极材料性能的影响

Influence of Heat Theat Treatment Process on Properties of Al—In—Mg—Sn Ce Anode Material

制备了Al—In—Mg—Sn—Ce五元铝合金阳极,通过极化曲线(Tafel)、电化学阻抗(EIS)、自腐蚀速率、放电性能等研究手段,研究了不同热处理工艺对铝合金阳极电化学性能及自腐蚀性能的影响;用电子探针显微分析仪对合金放电后的元素成分和表面微观形貌进行检测,并探讨了热处理工艺对铝阳极组织结构的影响。结果表明,退火处理对冷轧过的合金表面析出物的数量和大小有一定影响,提高了铝合金的电化学活性和耐蚀性。此外,在350℃保温6 h的退火条件下,Al—In—Mg—Sn—Ce合金阳极材料在实际使用过程中具有出色的放电性能,与其他退火温度条件相比,相关的性能参数得到了极大的改善。350℃保温6 h退火条件下的铝合金阳极在40 mA/cm~2和100 mA/cm~2电流密度放电时,能量密度最高,其能量密度分别为4 837.64 Wh/kg和3 283.62 Wh/kg。

An Al—In—Mg—Sn—Ce alloy anode was prepared.The effect of annealing condition on the electrochemistry properties of the alloy anode was analyzed via the measurements of hydrogen evolution rate,polarization curve,electrochemical impedance and constant current discharge.The microstructure and corrosion morphology of the alloy anode were determined by electron probe microanalyzer and scanning electron microscopy.The results show that the annealing treatment has a certain effect on the number and size of precipitates on the alloy surface,thus improving the electrochemical activity and corrosion resistance of the alloy anode.Also,the Al—In—Mg—Sn—Ce alloy anode material has an excellent discharge performance in an actual use process when the annealing condition is 350℃and 6 h.Tthe energy density is the maximum value,and its energy density is 4837.64 W·h/kg and 3283.62 W·h/kg when the aluminum alloy anode is discharged at the current density of 40 m A/cm 2 and 100 m A/cm 2,respectively.