Journal ArticleDOI
Impedance analysis on electric double layer capacitor with transmission line model
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TLDR
In this article, a new electrode model involving the fractal structure of activated carbon used as electrode material was proposed for an electric double layer capacitor (EDLC), where the branch pore structure of three sizes of cylindrical pores were related to macro, meso, and micro pore sizes.About:
This article is published in Journal of Power Sources.The article was published on 2007-01-10. It has received 109 citations till now. The article focuses on the topics: Characteristic impedance & Wave impedance.read more
Citations
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Theoretical Model for Nanoporous Carbon Supercapacitors
TL;DR: This work proposes a heuristic model to replace the commonly used model for an electric double-layer capacitor (EDLC) on the basis of anElectric double-cylinder capacitor for mesopores (2 {50 nm pore size), which becomes an electric wire-in-cylinders capacitor (EWCC) for micropores (< 2 nm port size).
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A Universal Model for Nanoporous Carbon Supercapacitors Applicable to Diverse Pore Regimes, Carbon Materials, and Electrolytes
TL;DR: A heuristic theoretical model that takes pore curvature into account as a replacement for the EDLC model, which is based on a traditional parallel-plate capacitor, is proposed and may lend support for the systematic optimization of the properties of carbon supercapacitors through experiments.
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Design Principle of Fe-N-C Electrocatalysts: How to Optimize Multimodal Porous Structures?
Soo Hong Lee,Jiheon Kim,Dong Young Chung,Ji Mun Yoo,Hyeon Seok Lee,Min Jeong Kim,Bongjin Simon Mun,Soon Gu Kwon,Yung-Eun Sung,Taeghwan Hyeon +9 more
TL;DR: The optimized catalyst exhibits one of the best ORR performance in alkaline medium with excellent long-term stability in anion exchange membrane fuel cell and accelerated durability test and establishes a basis for rationale design of the porous carbon structure for electrocatalyst applications.
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Potentiostatically deposited nanostructured α-Co(OH)2: A high performance electrode material for redox-capacitors
TL;DR: In this article, a high specific capacitance was obtained for α-Co(OH) 2 potentiostatically deposited onto a stainless-steel electrode in 0.1 M Co(NO 3 ) 2 electrolyte at −1.0 V vs. Ag/AgCl.
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Impedance Spectroscopy Characterization of Porous Electrodes under Different Electrode Thickness Using a Symmetric Cell for High-Performance Lithium-Ion Batteries
TL;DR: In this paper, the dependence of the internal resistance of porous electrodes with high loading weight on thickness was systematically investigated using a combination of electrochemical impedance spectroscopy with symmetric cells and the transmission line model for cylindrical pores.
References
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Journal ArticleDOI
Electrochemical Characteristics and Impedance Spectroscopy Studies of Carbon-Carbon Supercapacitors
TL;DR: In this paper, the results obtained on the electrochemical behavior of electrochemical capacitors assembled in nonaqueous electrolyte are presented and the impedance of the supercapacitors is discussed in terms of complex capacitance and complex power.
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Studies of activated carbons used in double-layer capacitors
Deyang Qu,Hang Shi +1 more
TL;DR: In this paper, the relation between the intrinsic pore size distribution of activated carbon materials and their electrochemical performance as electrodes of supercapacitor was discussed in detail, where activated carbons with larger pore sizes were found to be more suitable for high power applications.
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On porous electrodes in electrolyte solutions: I. Capacitance effects☆
TL;DR: In this paper, a unified and generally applicable treatment for the individual or combined effects of double layer capacitance and faradaic process in a.c. measurements is given for the diffusion coupled with a fast or a first-order slow electrode reaction.
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Carbon Electrodes for Double‐Layer Capacitors I. Relations Between Ion and Pore Dimensions
TL;DR: In this paper, high-surface-area carbons were prepared by carbonization of cotton cloth at elevated temperatures (up to 1050°C), followed by activation at 900°C by oxidation with CO 2 during different time periods.
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Influence of pore structure and surface chemistry on electric double layer capacitance in non-aqueous electrolyte
Dolores Lozano-Castelló,Diego Cazorla-Amorós,Angel Linares-Solano,Soshi Shiraishi,Hideyuki Kurihara,Asao Oya +5 more
TL;DR: In this article, the performance of electric double layer capacitors in nonaqueous electrolyte of a series of alkaline agent-activated carbons with high surface area is presented. And the results obtained in this study confirm that capacitance not only depends on surface area, but also on pore size distribution and surface chemistry.