Impact of electrolyte on pseudocapacitance and stability of porous titanium nitride (TiN) monolithic electrode

George Hasegawa; Atsushi Kitada; Shota Kawasaki; Kazuyoshi Kanamori; Kazuki Nakanishi; Yoji Kobayashi; Hiroshi Kageyama; Takeshi Abe

doi:10.1149/2.0491501jes

Impact of electrolyte on pseudocapacitance and stability of porous titanium nitride (TiN) monolithic electrode

George Hasegawa, Atsushi Kitada, Shota Kawasaki, Kazuyoshi Kanamori, Kazuki Nakanishi, Yoji Kobayashi, Hiroshi Kageyama, Takeshi Abe

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

We report the fabrication of porous titanium nitride (TiN) monoliths through the ammonolysis of porous TiO2 monoliths prepared via the sol-gel process accompanied by phase separation. The obtained TiN monoliths possess good mechanical strength as well as excellent electric conductivity with a superconducting transition at Tc ~ 5.0 K. We have investigated the electrochemical properties of the porous TiN monoliths as an electrode using various electrolytes. The results reveal that the pseudocapacitance of TiN increases in the order of K+ < Na+ < Li+ contrary to the case of EDL capacitance in neutral aqueous electrolytes. It is also found that acidic and strongly basic electrolytes are not suitable due to high corrosivity, while there is no significant deterioration when neutral aqueous electrolytes and organic electrolytes are used.

Original language	English (US)
Pages (from-to)	A77-A85
Journal	JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume	162
Issue number	1
DOIs	https://doi.org/10.1149/2.0491501jes
State	Published - Jan 1 2015
Externally published	Yes

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title = "Impact of electrolyte on pseudocapacitance and stability of porous titanium nitride (TiN) monolithic electrode",

abstract = "We report the fabrication of porous titanium nitride (TiN) monoliths through the ammonolysis of porous TiO2 monoliths prepared via the sol-gel process accompanied by phase separation. The obtained TiN monoliths possess good mechanical strength as well as excellent electric conductivity with a superconducting transition at Tc ~ 5.0 K. We have investigated the electrochemical properties of the porous TiN monoliths as an electrode using various electrolytes. The results reveal that the pseudocapacitance of TiN increases in the order of K+ < Na+ < Li+ contrary to the case of EDL capacitance in neutral aqueous electrolytes. It is also found that acidic and strongly basic electrolytes are not suitable due to high corrosivity, while there is no significant deterioration when neutral aqueous electrolytes and organic electrolytes are used.",

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T1 - Impact of electrolyte on pseudocapacitance and stability of porous titanium nitride (TiN) monolithic electrode

AU - Hasegawa, George

AU - Kitada, Atsushi

AU - Kawasaki, Shota

AU - Kanamori, Kazuyoshi

AU - Nakanishi, Kazuki

AU - Kobayashi, Yoji

AU - Kageyama, Hiroshi

AU - Abe, Takeshi

N1 - Generated from Scopus record by KAUST IRTS on 2022-09-13

PY - 2015/1/1

Y1 - 2015/1/1

N2 - We report the fabrication of porous titanium nitride (TiN) monoliths through the ammonolysis of porous TiO2 monoliths prepared via the sol-gel process accompanied by phase separation. The obtained TiN monoliths possess good mechanical strength as well as excellent electric conductivity with a superconducting transition at Tc ~ 5.0 K. We have investigated the electrochemical properties of the porous TiN monoliths as an electrode using various electrolytes. The results reveal that the pseudocapacitance of TiN increases in the order of K+ < Na+ < Li+ contrary to the case of EDL capacitance in neutral aqueous electrolytes. It is also found that acidic and strongly basic electrolytes are not suitable due to high corrosivity, while there is no significant deterioration when neutral aqueous electrolytes and organic electrolytes are used.

AB - We report the fabrication of porous titanium nitride (TiN) monoliths through the ammonolysis of porous TiO2 monoliths prepared via the sol-gel process accompanied by phase separation. The obtained TiN monoliths possess good mechanical strength as well as excellent electric conductivity with a superconducting transition at Tc ~ 5.0 K. We have investigated the electrochemical properties of the porous TiN monoliths as an electrode using various electrolytes. The results reveal that the pseudocapacitance of TiN increases in the order of K+ < Na+ < Li+ contrary to the case of EDL capacitance in neutral aqueous electrolytes. It is also found that acidic and strongly basic electrolytes are not suitable due to high corrosivity, while there is no significant deterioration when neutral aqueous electrolytes and organic electrolytes are used.

UR - https://iopscience.iop.org/article/10.1149/2.0491501jes

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IS - 1

ER -

Impact of electrolyte on pseudocapacitance and stability of porous titanium nitride (TiN) monolithic electrode

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