Al-Ga-In-Sn-Si合金阳极及海水溶解氧电池的电化学性能

Electrochemical Properties of Al-Ga-In-Sn-Si Alloy Anodes and Seawater Dissolved Oxygen Batteries

通过Ga、In和Sn低熔点合金元素改性,成功制备了高负电位高活化Al-Ga-In-Sn-Si合金阳极,通过材料表征和电化学测试研究了Al-Ga-In-Sn-Si合金的腐蚀行为和电化学性能,并与碳纤维刷-石墨烯-铂(Pt-G@CFB)催化阴极搭建了海水溶解氧电池,考察了室内静态海水环境和实际海洋环境下电池不同恒电阻的长周期放电性能。结果表明,Al-Ga-In-Sn-Si合金的自腐蚀电位为-1.613 V(vs.Ag/AgCl),自腐蚀电流密度为1.431 mA/cm^(2)。随着负载电阻的增加,电池电压上升,在室内静态和实海动态海水中2000Ω的负载下海水溶解氧电池平均放电电压最高,分别为1.73和1.78 V,在1000Ω的负载下平均能量密度最大,分别为549.85和653.44 Wh/kg。

In this paper,a new type of Al-Ga-In-Sn-Si alloy anode with high negative potential and high activation was successfully prepared by modifying low melting point alloy elements such as Ga,In and Sn.The corrosion behavior and electrochemical performance of Al-Ga-In-Sn-Si alloy were studied through material characterization and electrochemical tests.A seawater dissolved oxygen battery was constructed with carbon fiber brush-graphene-platinum(Pt-G@CFB)catalytic cathode.The long period discharge performance of the battery under different constant resistance in indoor static and real dynamic seawater environment was investigated.The electrochemical test results of aluminum anode show that the self-corrosion potential of Al-Ga-In-Sn-Si alloy is−1.613 V(vs.Ag/AgCl),and the self-corrosion current density is 1.431 mA/cm^(2).The battery discharge test results show that the battery voltage rises with the increase of load resistance.The average discharge voltages of the dissolved oxygen battery in seawater are the highest,which are 1.73 and 1.78 V respectively,under the load of 2000Ωin indoor static and real dynamic seawater,and the average energy densities are the highest under the load of 1000Ω.They are 549.85 and 653.44 Wh/kg,respectively.