Abstract
Vertically aligned TiO2 nanotube (TONT) arrays on titanium substrate developed by facile electrochemical anodization in an aqueous solution of 0.5 M Na2SO4, 0.5 M H3PO4, 0.2 M sodium citrate, and 0.5 wt% NaF were prepared having a pore diameter and thickness of 100 nm and 1.2 μm, respectively. The undoped (u-doped) TONT arrays possessing an anatase phase were again annealed at 500 C under a mixed gas flux of nitrogen (N2) and acetylene (C2H2), to induce the enhancement of electrical conductivity. It was designated as carbon-doped (c-doped) TONT arrays. Undoped and c-doped TONT arrays were compared using various characterization tools, including X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and X-ray photoelectron spectroscopy (XPS). Furthermore, based on several electrochemical tests (galvanostatic charge/discharge tests, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS)), it was observed that c-doped TONT arrays revealed improved charge/discharge capacity, cycle stability, and rate capability, due to the enhanced electrical conductivity of c-doped TONT arrays.
| Original language | English |
|---|---|
| Pages (from-to) | 275-281 |
| Number of pages | 7 |
| Journal | Journal of Alloys and Compounds |
| Volume | 597 |
| DOIs | |
| Publication status | Published - 2014 Jun 5 |
| Externally published | Yes |
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Keywords
- Anodization
- Carbon doping
- Li ion battery
- Titanium oxide nanotubes
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
Cite this
Carbon treated self-ordered TiO2 nanotube arrays with enhanced lithium-ion intercalation performance. / Kim, Hyun Sik; Yu, Seung-Ho; Sung, Yung Eun; Kang, Soon Hyung.
In: Journal of Alloys and Compounds, Vol. 597, 05.06.2014, p. 275-281.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Carbon treated self-ordered TiO2 nanotube arrays with enhanced lithium-ion intercalation performance
AU - Kim, Hyun Sik
AU - Yu, Seung-Ho
AU - Sung, Yung Eun
AU - Kang, Soon Hyung
PY - 2014/6/5
Y1 - 2014/6/5
N2 - Vertically aligned TiO2 nanotube (TONT) arrays on titanium substrate developed by facile electrochemical anodization in an aqueous solution of 0.5 M Na2SO4, 0.5 M H3PO4, 0.2 M sodium citrate, and 0.5 wt% NaF were prepared having a pore diameter and thickness of 100 nm and 1.2 μm, respectively. The undoped (u-doped) TONT arrays possessing an anatase phase were again annealed at 500 C under a mixed gas flux of nitrogen (N2) and acetylene (C2H2), to induce the enhancement of electrical conductivity. It was designated as carbon-doped (c-doped) TONT arrays. Undoped and c-doped TONT arrays were compared using various characterization tools, including X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and X-ray photoelectron spectroscopy (XPS). Furthermore, based on several electrochemical tests (galvanostatic charge/discharge tests, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS)), it was observed that c-doped TONT arrays revealed improved charge/discharge capacity, cycle stability, and rate capability, due to the enhanced electrical conductivity of c-doped TONT arrays.
AB - Vertically aligned TiO2 nanotube (TONT) arrays on titanium substrate developed by facile electrochemical anodization in an aqueous solution of 0.5 M Na2SO4, 0.5 M H3PO4, 0.2 M sodium citrate, and 0.5 wt% NaF were prepared having a pore diameter and thickness of 100 nm and 1.2 μm, respectively. The undoped (u-doped) TONT arrays possessing an anatase phase were again annealed at 500 C under a mixed gas flux of nitrogen (N2) and acetylene (C2H2), to induce the enhancement of electrical conductivity. It was designated as carbon-doped (c-doped) TONT arrays. Undoped and c-doped TONT arrays were compared using various characterization tools, including X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and X-ray photoelectron spectroscopy (XPS). Furthermore, based on several electrochemical tests (galvanostatic charge/discharge tests, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS)), it was observed that c-doped TONT arrays revealed improved charge/discharge capacity, cycle stability, and rate capability, due to the enhanced electrical conductivity of c-doped TONT arrays.
KW - Anodization
KW - Carbon doping
KW - Li ion battery
KW - Titanium oxide nanotubes
UR - http://www.scopus.com/inward/record.url?scp=84894699542&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84894699542&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2014.02.013
DO - 10.1016/j.jallcom.2014.02.013
M3 - Article
AN - SCOPUS:84894699542
VL - 597
SP - 275
EP - 281
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -