为了研究炭黑对锌空气电池空气扩散电极电性能的影响,选用不同种类的炭黑作为锌空气电池空气扩散电极的导电剂,采用辊压法制备出空气扩散电极,测试了空气扩散电极的含液率、极化曲线、使用寿命和所得AA型锌空气电池样品的放电容量,还利用扫描电镜(SEM)对空气扩散电极催化层的表观形貌进行了观察。研究结果表明,Shawinigan Black AB 50炭黑的疏水性最好,所得空气扩散电极的含液率最低、电性能最好、使用寿命最长,所制AA型锌空气电池样品的放电容量可达4.6 Ah。
A novel approach based on the quantitative phase field model was proposed to calculate the interface mobility and applied to the α/β interface of a ternary Ti-6Al-4V alloy.Phase field simulations indicate that the higher interface mobility leads to the faster transformation rate,but only a unique value of interface mobility matches the diffusion equation under the diffusion-controlled condition.By comparing the transformation kinetics from phase field simulations with that from classical diffusion equation,the interface mobility at different temperatures can be obtained.The results show that the calculated interface mobility increases with increasing temperature and accords with Arrhenius equation very well.
