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本发明属于铝氧化银电池技术领域,具体涉及一种电池用铝合金负极材料、碱性电解液缓蚀剂、制备方法及应用。电池用铝合金负极材料由组分组成:0.3%‑0.6%的Mg,0.03%‑0.05%的Ga,0.05%‑0.08%的Sn,0.05%‑0.08%的Hg,0.05‑0.08%的Bi,0.005%‑0.01%的Pb,0.03%‑0.06%的稀土Re、Er、Ce或Pr,其余为铝。碱性电解液缓蚀剂由以下组分组成:10g/L‑30g/L的锡酸钠或锡酸钾,0.02g/L‑0.08g/L的氢氧化铅,0.02g/L‑0.1g/L的氧化锌或硫酸锌。使得铝合金负极材料在保持高的电极电位的同时,具有较低的腐蚀速率。