全钒氧化还原液流储能电池组

Study on all-vanadium redox flow cell stack for energy storage

用10节单电池组成了全钒液流电池组,每节单电池有效电极面积为451.4 cm2,电极材料为聚丙腈石墨毡,双极板为石墨板,隔膜为Nafion膜。室温下工作时电池组最大输出功率为1.23kW,比功率0.27W/cm2。充放电电流密度为20 mA/cm2时,电池组的电压效率达87.8%,能量效率达78.2%。

The all-vanadium redox flow cell stack composed of 10 cells was made. The electrode effective area of every cell is 451.4 cm^2, Polyacrylonitrile （PAN）-based graphite felts were used as electrode materials, graphite plate as bipolar plate, Nation membrane as separator. The maximum output power of this stack is 1.23 kW, and the power density is 0,27 W/cm^2 at room temperature. When charge-discharge current density is 20 mA/cm^2, the stack＇s voltage and energy efficiency is up to 87.8% and 78.2%, respectively.