Abstract
Hollow CuO nanopowders are prepared using a simple spray drying process that relied on nanoscale Kirkendall diffusion; these nanopowders have potential applications in lithium-ion batteries. Citric acid is used as both the carbon source material and chelating agent and plays a key role in the preparation of the hollow nanopowders. The formless Cu-C composite that formed as an intermediate product transforms into slightly aggregated CuO hollow nanopowders after post-treatment at 300 and 400 °C under an air atmosphere. The CuO hollow nanopowders exhibit higher initial discharge capacities and better cycling performances than those of the filled-structured CuO nanopowders, which are prepared at a post-treatment temperature of 500 °C under an air atmosphere. The discharge capacities of the CuO nanopowders post-treated at 300, 400, and 500 °C for the 150 th cycle at a current density of 1 A g -1 are 793, 632, and 464 mA h g -1 , respectively, and their capacity retentions calculated from the maximum discharge capacities are 88, 80, and 73%, respectively. The CuO nanopowders with hollow structures exhibit better structural stability for repeated lithium insertion and desertion processes than those with filled structures.
| Original language | English |
|---|---|
| Pages (from-to) | 74-83 |
| Number of pages | 10 |
| Journal | Journal of Alloys and Compounds |
| Volume | 671 |
| DOIs | |
| Publication status | Published - 2016 Jun 25 |
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Keywords
- Anode material
- Copper oxide
- Kirkendall diffusion
- Lithium-ion battery
- Spray drying
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
Cite this
Electrochemical properties of CuO hollow nanopowders prepared from formless Cu-C composite via nanoscale Kirkendall diffusion process. / Won, Jong Min; Kim, Jong Hwa; Choi, Yun Ju; Cho, Jung Sang; Kang, Yun Chan.
In: Journal of Alloys and Compounds, Vol. 671, 25.06.2016, p. 74-83.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrochemical properties of CuO hollow nanopowders prepared from formless Cu-C composite via nanoscale Kirkendall diffusion process
AU - Won, Jong Min
AU - Kim, Jong Hwa
AU - Choi, Yun Ju
AU - Cho, Jung Sang
AU - Kang, Yun Chan
PY - 2016/6/25
Y1 - 2016/6/25
N2 - Hollow CuO nanopowders are prepared using a simple spray drying process that relied on nanoscale Kirkendall diffusion; these nanopowders have potential applications in lithium-ion batteries. Citric acid is used as both the carbon source material and chelating agent and plays a key role in the preparation of the hollow nanopowders. The formless Cu-C composite that formed as an intermediate product transforms into slightly aggregated CuO hollow nanopowders after post-treatment at 300 and 400 °C under an air atmosphere. The CuO hollow nanopowders exhibit higher initial discharge capacities and better cycling performances than those of the filled-structured CuO nanopowders, which are prepared at a post-treatment temperature of 500 °C under an air atmosphere. The discharge capacities of the CuO nanopowders post-treated at 300, 400, and 500 °C for the 150 th cycle at a current density of 1 A g -1 are 793, 632, and 464 mA h g -1 , respectively, and their capacity retentions calculated from the maximum discharge capacities are 88, 80, and 73%, respectively. The CuO nanopowders with hollow structures exhibit better structural stability for repeated lithium insertion and desertion processes than those with filled structures.
AB - Hollow CuO nanopowders are prepared using a simple spray drying process that relied on nanoscale Kirkendall diffusion; these nanopowders have potential applications in lithium-ion batteries. Citric acid is used as both the carbon source material and chelating agent and plays a key role in the preparation of the hollow nanopowders. The formless Cu-C composite that formed as an intermediate product transforms into slightly aggregated CuO hollow nanopowders after post-treatment at 300 and 400 °C under an air atmosphere. The CuO hollow nanopowders exhibit higher initial discharge capacities and better cycling performances than those of the filled-structured CuO nanopowders, which are prepared at a post-treatment temperature of 500 °C under an air atmosphere. The discharge capacities of the CuO nanopowders post-treated at 300, 400, and 500 °C for the 150 th cycle at a current density of 1 A g -1 are 793, 632, and 464 mA h g -1 , respectively, and their capacity retentions calculated from the maximum discharge capacities are 88, 80, and 73%, respectively. The CuO nanopowders with hollow structures exhibit better structural stability for repeated lithium insertion and desertion processes than those with filled structures.
KW - Anode material
KW - Copper oxide
KW - Kirkendall diffusion
KW - Lithium-ion battery
KW - Spray drying
UR - http://www.scopus.com/inward/record.url?scp=84959018497&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84959018497&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2016.01.252
DO - 10.1016/j.jallcom.2016.01.252
M3 - Article
AN - SCOPUS:84959018497
VL - 671
SP - 74
EP - 83
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -