摘要
研究了铝空气电池的Al-Zn-In-Mg-Ga-Mn合金阳极在2 mol/L NaCl和4 mol/L KOH电解液中的自腐蚀行为和电化学性能。结果表明,在2 mol/L的NaCl和4 mol/L的KOH溶液中,Al-Zn-In-Mg-Ga-Mn合金阳极比纯Al阳极的腐蚀电位(Ecorr)分别负移了0.041和0.018 V,自腐蚀速率分别降低了0.2146和15.1 mg·cm^(-2)·h^(-1),使金属阳极的电化学活性得以提高,自腐蚀行为受到了抑制。在2 mol/L的NaCl电解液中,合金阳极的放电容量峰值达到2608.96 Ah·kg^(-1),比纯Al阳极提高了55.59%;能量密度最高为1742.61 Wh·kg^(-1),比纯Al阳极提高了274.58%,阳极效率为87.55%。在4 mol/L的KOH电解液中,合金阳极的放电容量最高为1605.15 Ah·kg^(-1),比纯Al阳极提高了131.27%;能量密度最高为1404.83 Wh·kg^(-1),比纯Al阳极提高了231.52%,阳极效率为53.86%。
The free corrosion behavior and electrochemical properties of Al-Zn-In-Mg-Ga-Mn alloys,as anodes working with 2 mol/L NaCl and 4 mol/L KOH electrolytes were studied.Results revealed that in the two electrolytes,the corrosion potential(Ecorr)of alloy anodes shifted negatively by 0.041 V and 0.018 V,and the free corrosion rates decreased by 0.2146 and 15.1 mg·cm^(-2)·h^(-1),respectively in the contrast to those of pure Al anode.The electrochemical activity of pure Al anode was improved,while its free corrosion behavior was inhibited.In the 2 mol/L NaCl electrolyte,the discharge capacity peak of the alloy anode reached 2608.96 Ah·kg^(-1),which was 55.59%higher than that of the pure Al anode.The highest energy density attained 1742.61 Wh·kg^(-1),being 274.58%superior to that of the pure Al anode.The anode efficiency was 87.55%.In the 4 mol/L KOH electrolyte,the highest discharge capacity of the Al-Zn-In-Mg-Ga-Mn alloy anode was 1605.15 Ah·kg^(-1),which was 131.27%higher than that of the pure Al anode.The highest energy density was 1404.83 Wh·kg^(-1),which was 231.52%higher than that of the pure Al anode.The anode efficiency was 53.86%.
作者
吴厚燃
段体岗
马力
邵刚勤
张恒宇
张海兵
WU Houran;DUAN Tigang;MA Li;SHAO Gangqin;ZHANG Hengyu;ZHANG Haibing(State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;National State Key Laboratory for Marine Corrision and Protection,Luoyang Ship Material Research Institute,Qingdao 266237,China)
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2024年第4期257-268,共12页
Chinese Journal of Materials Research
基金
国家重点研发计划(2022YFB3808800)。
