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2.6 V aqueous symmetric supercapacitors based on phosphorus-doped TiO2 nanotube arrays

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Abstract

Increasing the voltage window of an electrode material is effective for improving the energy density of aqueous symmetric supercapacitors. Herein, a novel aqueous symmetric supercapacitor equipped with a high cell voltage window of 2.6 V was assembled by P-doped TiO2 nanotube arrays on a Ti sheet. The arrays exhibit a wide potential range of about 1.2 V as the cathode, and a stable wide potential range of 1.4 V as the anode was also obtained. These wide potential windows in the cathode and anode render the symmetric supercapacitor with a very large working voltage window reaching 2.6 V, and thus a high volumetric energy density (1.65 mW h cm−3). These results suggest that P-doped TiO2 nanotube arrays can be promising candidates for energy storage devices.

Graphical abstract: 2.6 V aqueous symmetric supercapacitors based on phosphorus-doped TiO2 nanotube arrays

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Article information


Submitted
07 Nov 2019
Accepted
06 Jan 2020
First published
06 Jan 2020

Dalton Trans., 2020, Advance Article
Article type
Paper

2.6 V aqueous symmetric supercapacitors based on phosphorus-doped TiO2 nanotube arrays

Y. Zhang, S. Duan, Y. Li, S. Zhang, Y. Wu, M. Ma, C. Tao, Z. Zhang, D. Qin and E. Xie, Dalton Trans., 2020, Advance Article , DOI: 10.1039/C9DT04316K

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