Abstract
The prevention of Li dendrite growth in Li-metal secondary cells is investigated using high-Li-content electrodes. Li powder is formed using droplet emulsions, and the powder is then used to fabricate porous Li-powder electrodes that are tested against Li-foil electrodes. Scanning electron microscopy results show that dendrites form in a Li-foil cell when the cell is charged and discharged to 25% of the theoretical Li capacity (965 mAhg-1) at 1/3 C-rate (5mAcm-2). This dendrite formation causes cell failure after 10 cycles. No dendrites are observed in the Li-powder cell tested for 250 cycles. Li-powder anodes can be used directly in high-capacity cells such as Li-air or Li-S cells.
| Original language | English |
|---|---|
| Journal | Journal of the Electrochemical Society |
| Volume | 159 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2012 Dec 1 |
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ASJC Scopus subject areas
- Electrochemistry
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Surfaces, Coatings and Films
- Renewable Energy, Sustainability and the Environment
- Condensed Matter Physics
Cite this
Electrochemical behavior of Li-powder anode in high Li capacity used. / Kong, Shin Kook; Kim, Bok Ki; Yoon, Wooyoung.
In: Journal of the Electrochemical Society, Vol. 159, No. 9, 01.12.2012.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrochemical behavior of Li-powder anode in high Li capacity used
AU - Kong, Shin Kook
AU - Kim, Bok Ki
AU - Yoon, Wooyoung
PY - 2012/12/1
Y1 - 2012/12/1
N2 - The prevention of Li dendrite growth in Li-metal secondary cells is investigated using high-Li-content electrodes. Li powder is formed using droplet emulsions, and the powder is then used to fabricate porous Li-powder electrodes that are tested against Li-foil electrodes. Scanning electron microscopy results show that dendrites form in a Li-foil cell when the cell is charged and discharged to 25% of the theoretical Li capacity (965 mAhg-1) at 1/3 C-rate (5mAcm-2). This dendrite formation causes cell failure after 10 cycles. No dendrites are observed in the Li-powder cell tested for 250 cycles. Li-powder anodes can be used directly in high-capacity cells such as Li-air or Li-S cells.
AB - The prevention of Li dendrite growth in Li-metal secondary cells is investigated using high-Li-content electrodes. Li powder is formed using droplet emulsions, and the powder is then used to fabricate porous Li-powder electrodes that are tested against Li-foil electrodes. Scanning electron microscopy results show that dendrites form in a Li-foil cell when the cell is charged and discharged to 25% of the theoretical Li capacity (965 mAhg-1) at 1/3 C-rate (5mAcm-2). This dendrite formation causes cell failure after 10 cycles. No dendrites are observed in the Li-powder cell tested for 250 cycles. Li-powder anodes can be used directly in high-capacity cells such as Li-air or Li-S cells.
UR - http://www.scopus.com/inward/record.url?scp=84875496556&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84875496556&partnerID=8YFLogxK
U2 - 10.1149/2.062209jes
DO - 10.1149/2.062209jes
M3 - Article
AN - SCOPUS:84875496556
VL - 159
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
SN - 0013-4651
IS - 9
ER -