超级电容器用多孔电极中孔隙率和扩散系数的作用--相关理论和实验研究
Role of porosity and diffusion coefficient in porous electrode used in supercapacitors- Correlating theoretical and experimental studies
摘要：
多孔电极正迅速成为下一代超级电容器的重要组成部分。使用多孔结构的Co 3 O 4，Mn 3 O 4，α Fe 2 O3，和碳，它们的优点超过固体对应物是明确成立的。多孔结构中的改进的性能与增强的活性比表面和直接通道相关，从而导致改进的电解质与氧化还原活性位点的相互作用。利用菲克定律的理论模型，提出了一个可以一致地解释实验数据。由于较高的扩散系数，多孔结构表现出比电容增加近50 - 80%，以及高倍率性能和优异的循环稳定性。
英文摘要：
Porous electrodes are fast emerging as essential components for next generation supercapacitors. Using porous structures of Co3O4, Mn3O4, alpha Fe2O3, and carbon, their advantages over the solid counterpart is unequivocally established. The improved performance in porous architecture is linked to the enhanced active specific surface and direct channels leading to improved electrolyte interaction with the redox active sites. A theoretical model utilizing the Fick's law is proposed, that can consistently explain the experimental data. The porous structures exhibit nearly 50 - 80 percentage increment in specific capacitance, along with high rate capabilities and excellent cycling stability due to the higher diffusion coefficients.
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