Development of vanadium solid battery with high energy density for hybrid vehicles

用来评价能量效率的标准速率常数被认为是“常数”。然而，实际上它依赖于活性物质的浓度。另外，我们的VSSB使用浓度很高的浆料活性物质。在本工作中，阐明了“标准速率常数”与钒离子浓度的关系及其对能量效率的影响。计算了“碳纤维-浆料活性材料”复合材料中1-5moldm-3的标准速率常数(K0)，并在此基础上计算了VRFB和VSSB的能量效率.虽然k0随浓度的增加而减小，但VSSB的能量效率并不因大浓度的补偿而降低.

Standard rate constant, which is required to evaluate the energy efficiency, is believed to be “constant". However, there are practically dependent on the concentration of active materials. In addition, our VSSB uses slurry active material with very high concentration. In this work, the dependence of the “standard rate constant" on concentration of Vanadium ions and its effect on the energy efficiency were clarified. Standard rate constants (k0) for 1 - 5 mol dm-3 in composite of “carbon fiber - slurry active material" was evaluated. On the basis of the obtained k0 values, energy efficiencies for VRFB and VSSB were calculated. In spite that k0 decreases with increasing the concentration, energy efficiency for VSSB is not decreased because of the compensation by the large concentration.