Can conductivity measurements serve as a tool for assessing pseudocapacitance processes occurring on carbon electrodes?

Pollak, Elad; Salitra, Gregory; Aurbach, Doron

doi:10.1016/j.jelechem.2006.12.018

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…According to Pollak et al, a lone pair of nitrogen in pyridine could be conjugated with the carbon backbone, which is responsible for the electronic conductivity of the carbon material. 30 Conversely, this conjugation may reduce the pseudocapacitive contribution. Anyway, the quantitative analysis on the roles of the nitrogen-containing functional groups is not sufficient at this stage, requiring further investigation.…”

Section: Galvanostatic Charge/discharge Tests-the Set Of CC Electrodesmentioning

confidence: 99%

Nitrogen-Doped Carbon Cloth for Supercapacitors Prepared via a Hydrothermal Process

Nakayama¹,

Komine²,

Inohara³

2016

J. Electrochem. Soc.

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This paper reports a facile means of fabricating nitrogen-doped carbon cloth (CC) via a hydrothermal process in the presence of hydrazine and ammonia. The resulting N-doped CC can be used directly as an electrode for a supercapacitor, requiring no polymeric binder or current collector. X-ray photoelectron spectroscopy (XPS) revealed that the surface of oxidized CC was nitrogen-doped concurrently with reduction; in other words, the oxygen-containing groups were replaced with nitrogen species of different types depending on the composition and temperature of the hydrothermal bath. The highest areal capacitance was estimated to be 136 mF cm −2 at a current density of 0.5 mA cm −2 for a N-doped CC electrode treated at 160 • C, while the capacitance remained at 81% of its original value when the applied current density was increased from 0.5 to 15 mA cm −2 . We explored the role of different nitrogen species in the capacitive process based on a combination of XPS and electrochemical measurements. High hydrothermal temperatures and the presence of NH 3 yielded pyridinic nitrogen atoms, leading to fast electron transfer during charge/discharge cycles.

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Section: Galvanostatic Charge/discharge Tests-the Set Of CC Electrodesmentioning

confidence: 99%

Nitrogen-Doped Carbon Cloth for Supercapacitors Prepared via a Hydrothermal Process

Nakayama¹,

Komine²,

Inohara³

2016

J. Electrochem. Soc.

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“…The pseudocapacitance arises from a Faradaic reaction when some of the charge (q) passed in an electrode process is related to the electrode potential (V) via thermodynamical considerations [26]. The two principal cases are adsorption pseudocapacitance arising in underpotential deposition processes [26], and homogeneous redox pseudocapacitance where the reaction is reversible [26,27]. Pseudocapacitors thus combine features of both capacitors and batteries [18,28].…”

Section: Capacitor Supercapacitor Batterymentioning

confidence: 99%

Carbon Nanotubes for Energy Applications

Antiohos¹,

Romano²,

Razal³

2013

Syntheses and Applications of Carbon Nanotubes and Their Composites

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“…The study of CSFs and pseudocapacitance has been undertaken by others [2,5,6]; here, the standardization of current techniques and the development of novel electrochemically-coupled methods to identify pseudocapacitive CSFs were undertaken.…”

mentioning

confidence: 99%

Development of Techniques for the Determination of Carbon Surface Functionalities on Carbon Electrodes for Supercapacitors

Goertzen,

Andreas

2009

Meet. Abstr.

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Can conductivity measurements serve as a tool for assessing pseudocapacitance processes occurring on carbon electrodes?

Cited by 5 publications

References 23 publications

Nitrogen-Doped Carbon Cloth for Supercapacitors Prepared via a Hydrothermal Process

Nitrogen-Doped Carbon Cloth for Supercapacitors Prepared via a Hydrothermal Process

Carbon Nanotubes for Energy Applications

Development of Techniques for the Determination of Carbon Surface Functionalities on Carbon Electrodes for Supercapacitors

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