Zn^(2+)/Zn和Fe^(3+)/Fe^(2+)的电化学行为及其在液流电池中的应用

Electrochemical Behavior of Zn^(2+)/Zn and Fe^(3+)/Fe^(2+)and Their Applications in Flow Battery

锌铁液流电池采用成本低廉的锌、铁元素作为活性物质,有望成为下一代高性价比储能电池。本文利用循环伏安法测试锌、铁离子在碳毡电极表面的电化学活性,计算Zn^(2+)/Zn与Fe^(3+)/Fe^(2+)的扩散系数与反应速率常数。结果表明,锌离子与铁离子在多孔碳毡上具有良好的电化学性能,可以作为锌铁液流电池的活性物质。充放电测试结果表明,锌铁液流电池的充放电性能良好,它具有较高的电流效率、电压效率和能量效率。

Zinc-iron flow battery uses zinc and iron elements with low cost as active materials,which is expected to become the next generation of cost-effective energy storage battery.In this paper,the electrochemical activity of zinc and iron ions on the surface of carbon felt electrode is measured by cyclic voltammetry,and the diffusion coefficient and reaction rate constant of Zn^(2+)/Zn and Fe^(3+)/Fe^(2+)are calculated.The results show that zinc ion and iron ion have good electrochemical performance on porous carbon felt and can be used as active materials of zinc-iron flow battery.The charge and discharge test results show that the zinc-iron flow battery has good charge and discharge performance,and it has high current efficiency,voltage efficiency and energy efficiency.