一种铝-空气燃料电池能量重整技术的研究

Study on a Technology of Energy Reintegration for Aluminum-Air Fuel Cell

为探究4 mol/L氢氧化钾电解液中不同锌离子浓度对铝-空气燃料电池负极自腐蚀的影响,提高其放电性能,采用6061铝合金作为负极,氧化锌作为电解液添加剂,进行了析氢失重分析.利用网包负极结构完成了能量的重新整合,并测试了电池的放电性能.结果表明:当4 mol/L氢氧化钾电解液中含0.3 mol/L锌离子时,6061铝合金的抑氢效率最高,约为64.364%.在该电解液下,使用网包负极结构的燃料电池以20 mA/cm2电流密度放电时的电极效率和比容量最高,分别约为41.633%和1240.665 A·h/kg,较优化前提升了64.440%.燃料因腐蚀耗散的能量被存储于其表面的沉积锌中,并在负极网的辅助下转化成电能,达到了能量重整的目的,使电池性能得到了显著提升.

For exploring the influence of different concentrations of zinc ions in the 4 M potassium hydroxide electrolyte on the anode self-corrosion of the aluminum-air fuel cell and further improving its discharge performance,6061 aluminum alloy was used as the anode and zinc oxide was used as the electrolyte additive for hydrogen evolution weight loss analysis,and the structure of the mesh-encapsulated anode was used to complete the energy reintegration and test the discharge performance of fuel cell.The results show that when the 4 M potassium hydroxide electrolyte contains 0.3 M zinc ions,the 6061 aluminum alloy can get the highest hydrogen inhibition efficiency,being of 64.364%.Moreover,in this electrolyte,the fuel cell with the mesh-encapsulated anode structure can get the highest anode efficiency and specific capacity when discharged at a current density of 20 mA/cm2,being of 41.633%and 1240.665 A·h/kg,respectively,heightening 64.440%than before optimization.The energy dissipated by the fuel due to self-corrosion can be stored in the deposited zinc on its surface,and be converted into electrical energy with the aid of the anode mesh,achieving the purpose of energy reintegration and improving the fuel cell performance significantly.