Abstract
Phase-pure anatase TiO2 nanofibers with a fiber-in-tube structure were prepared by the electrospinning process. The burning of titanium-oxide-carbon composite nanofibers with a filled structure formed as an intermediate product under an oxygen atmosphere produced carbon-free TiO2 nanofibers with a fiber-in-tube structure. The sizes of the nanofiber core and hollow nanotube were 140 and 500 nm, respectively. The heat treatment of the electrospun nanofibers at 450 and 500 C under an air atmosphere produced grey and white filled-structured TiO2 nanofibers, respectively. The initial discharge capacities of the TiO2 nanofibers with the fiber-in-tube and filled structures and the commercial TiO2 nanopowders were 231, 134, and 223 mA h g-1, respectively, and their corresponding charge capacities were 170, 100, and 169 mA h g-1, respectively. The 1000th discharge capacities of the TiO2 nanofibers with the fiber-in-tube and filled structures and the commercial TiO2 nanopowders were 177, 64, and 101 mA h g-1, respectively, and their capacity retentions measured from the second cycle were 89, 82, and 52 %, respectively. The TiO2 nanofibers with the fiber-in-tube structure exhibited low charge transfer resistance and structural stability during cycling and better cycling and rate performances than the TiO2 nanofibers with filled structures and the commercial TiO2 nanopowders. Phase-pure anatase TiO2 nanofibers with a fiber-in-tube structure are prepared by the electrospinning process. The prepared TiO2 nanofibers with a fiber-in-tube structure show better cycling and rate performances than the TiO2 nanofibers with filled structure and the commercial TiO2 nanopowders.
| Original language | English |
|---|---|
| Pages (from-to) | 11082-11087 |
| Number of pages | 6 |
| Journal | Chemistry - A European Journal |
| Volume | 21 |
| Issue number | 31 |
| DOIs | |
| Publication status | Published - 2015 Jan 1 |
Fingerprint
Keywords
- energy storage materials
- lithium
- nanostructures
- synthesis design
- titanium dioxide
ASJC Scopus subject areas
- Catalysis
- Organic Chemistry
Cite this
Electrochemical Properties of Fiber-in-Tube- and Filled-Structured TiO2 Nanofiber Anode Materials for Lithium-Ion Batteries. / Cho, Jung Sang; Hong, Young Jun; Kang, Yun Chan.
In: Chemistry - A European Journal, Vol. 21, No. 31, 01.01.2015, p. 11082-11087.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrochemical Properties of Fiber-in-Tube- and Filled-Structured TiO2 Nanofiber Anode Materials for Lithium-Ion Batteries
AU - Cho, Jung Sang
AU - Hong, Young Jun
AU - Kang, Yun Chan
PY - 2015/1/1
Y1 - 2015/1/1
N2 - Phase-pure anatase TiO2 nanofibers with a fiber-in-tube structure were prepared by the electrospinning process. The burning of titanium-oxide-carbon composite nanofibers with a filled structure formed as an intermediate product under an oxygen atmosphere produced carbon-free TiO2 nanofibers with a fiber-in-tube structure. The sizes of the nanofiber core and hollow nanotube were 140 and 500 nm, respectively. The heat treatment of the electrospun nanofibers at 450 and 500 C under an air atmosphere produced grey and white filled-structured TiO2 nanofibers, respectively. The initial discharge capacities of the TiO2 nanofibers with the fiber-in-tube and filled structures and the commercial TiO2 nanopowders were 231, 134, and 223 mA h g-1, respectively, and their corresponding charge capacities were 170, 100, and 169 mA h g-1, respectively. The 1000th discharge capacities of the TiO2 nanofibers with the fiber-in-tube and filled structures and the commercial TiO2 nanopowders were 177, 64, and 101 mA h g-1, respectively, and their capacity retentions measured from the second cycle were 89, 82, and 52 %, respectively. The TiO2 nanofibers with the fiber-in-tube structure exhibited low charge transfer resistance and structural stability during cycling and better cycling and rate performances than the TiO2 nanofibers with filled structures and the commercial TiO2 nanopowders. Phase-pure anatase TiO2 nanofibers with a fiber-in-tube structure are prepared by the electrospinning process. The prepared TiO2 nanofibers with a fiber-in-tube structure show better cycling and rate performances than the TiO2 nanofibers with filled structure and the commercial TiO2 nanopowders.
AB - Phase-pure anatase TiO2 nanofibers with a fiber-in-tube structure were prepared by the electrospinning process. The burning of titanium-oxide-carbon composite nanofibers with a filled structure formed as an intermediate product under an oxygen atmosphere produced carbon-free TiO2 nanofibers with a fiber-in-tube structure. The sizes of the nanofiber core and hollow nanotube were 140 and 500 nm, respectively. The heat treatment of the electrospun nanofibers at 450 and 500 C under an air atmosphere produced grey and white filled-structured TiO2 nanofibers, respectively. The initial discharge capacities of the TiO2 nanofibers with the fiber-in-tube and filled structures and the commercial TiO2 nanopowders were 231, 134, and 223 mA h g-1, respectively, and their corresponding charge capacities were 170, 100, and 169 mA h g-1, respectively. The 1000th discharge capacities of the TiO2 nanofibers with the fiber-in-tube and filled structures and the commercial TiO2 nanopowders were 177, 64, and 101 mA h g-1, respectively, and their capacity retentions measured from the second cycle were 89, 82, and 52 %, respectively. The TiO2 nanofibers with the fiber-in-tube structure exhibited low charge transfer resistance and structural stability during cycling and better cycling and rate performances than the TiO2 nanofibers with filled structures and the commercial TiO2 nanopowders. Phase-pure anatase TiO2 nanofibers with a fiber-in-tube structure are prepared by the electrospinning process. The prepared TiO2 nanofibers with a fiber-in-tube structure show better cycling and rate performances than the TiO2 nanofibers with filled structure and the commercial TiO2 nanopowders.
KW - energy storage materials
KW - lithium
KW - nanostructures
KW - synthesis design
KW - titanium dioxide
UR - http://www.scopus.com/inward/record.url?scp=84945894463&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84945894463&partnerID=8YFLogxK
U2 - 10.1002/chem.201500729
DO - 10.1002/chem.201500729
M3 - Article
AN - SCOPUS:84945894463
VL - 21
SP - 11082
EP - 11087
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
SN - 0947-6539
IS - 31
ER -