Role of porosity and diffusion coefficient in porous electrode used in supercapacitors – Correlating theoretical and experimental studies

IF 2.9 Q2 ELECTROCHEMISTRY Electrochemical science advances Pub Date : 2022-02-25 DOI:10.1002/elsa.202100159
Puja De, Joyanti Halder, Chinmayee Chowde Gowda, Sakshi Kansal, Surbhi Priya, Satvik Anshu, Ananya Chowdhury, Debabrata Mandal, Sudipta Biswas, Brajesh Kumar Dubey, Amreesh Chandra
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引用次数: 13

Abstract

Porous electrodes are fast emerging as essential components for next-generation supercapacitors. Using porous structures of Co3O4, Mn3O4, α-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 Fick's law is proposed, that can consistently explain the experimental data. The porous structures exhibit ∼50%–80% increment in specific capacitance, along with high rate capabilities and excellent cycling stability due to the higher diffusion coefficients.

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孔隙率和扩散系数在超级电容器多孔电极中的作用——相关理论和实验研究
孔隙率和扩散系数在超级电容器中使用的多孔电极中的作用相关理论和实验研究Puja De、Joyanti Halder、Chinmaye Chowde Gowda、Sakshi Kansal、Surbhi Priya、Satvik Anshu、Ananya Chowdhury、Debabrata Mandal、Sudipta Biswas、Brajesh Kumar Dubey和Amreesh Chandra 2,3*纳米科学与技术学院物理系,印度哈拉格布尔印度理工学院土木工程系能源科学与工程学院-7213202。
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