Abstract
Nanostructured electrochemical capacitors (ECs) are advantageous for charge and energy storage due to their intrinsically large surface area, which contributes to a large electrostatic/double layer capacitance (C dl ). However, the intrinsically small density of states in nanostructures results in a quantum capacitance (C Q ) in series with C dl which could diminish the total device capacitance (C tot ). We investigate, through comparison with experiment, the relative magnitudes of C dl and C Q in electrodes constituted of carbon nanotube arrays. We will also present an equivalent circuit of C dl and C Q in series based on the voltage drop across C Q . Consequently, we attribute the increase in C tot resulting from ionizing radiation to an increased C Q and suggest limits to the capacitance in ECs. A relation to pseudocapacitance will also be discussed.
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The original text uses Co and CR. please do not confuse these for capacitances. These are molar concentrations.
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Yamada, H., Bandaru, P.R. (2014). The Role and Application of Quantum Capacitance in Nanostructured Energy Storage Devices. In: TMS 2014: 143rd Annual Meeting & Exhibition. Springer, Cham. https://doi.org/10.1007/978-3-319-48237-8_101
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DOI: https://doi.org/10.1007/978-3-319-48237-8_101
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48593-5
Online ISBN: 978-3-319-48237-8
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