- 期刊
- OpenAccess
Performance Improvement of the All‐Lead Redox Flow Battery in Fluoroboric Acid Electrolyte
並列摘要
The performance of the all‐lead redox flow battery was enhanced by using stainless steel as the negative electrode and tantalum carbide (TaC) as the positive electrode in an intermixture of Pb(BF_4)_2-HBF_4 aqueous electrolyte. The results of cyclic voltammetry (CV) measurements show that stainless steel and TaC electrodes are capable of offering higher voltage efficiency than graphite electrodes at a lower scan rate. In the charge-discharge cycles, the battery was charged at current densities of 10, 20 or 40 mA·cm^(-2) with a charge capacity of 7.0 mAh·cm-2 and discharged down to 1.0 V at the same current density. The miniature battery offers an average discharge voltage of 1.55 V, an average coulombic efficiency of above 96%, and an energy efficiency of above 65%. The battery in 1.5 mol·L^(-1) of Pb(BF_4)_2+1.0 mol·L^(-1) of HBF_4 aqueous solution is able to deliver an average energy efficiency of above 80% at the current density of 10 mA·cm^(-2).