Abstract
Practical application of silicon anodes for lithium-ion batteries has been mainly hindered because of their low electrical conductivity and large volume change (ca. 300%) occurring during the lithiation and delithiation processes. Thus, the surface engineering of active particles (material design) and the modification of electrode structure (electrode design) of silicon are necessary to alleviate these critical limiting factors. Silicon/carbon core-shell particles (Si@C, material design) are prepared by the thermal decomposition and subsequent three-dimensional (3D) electrode structures (electrode design) with a channel width of 15 μm are incorporated using the laser ablation process. The electrochemical characteristics of 3D Si@C used as the anode material for lithium-ion batteries are investigated to identify the effects of material and electrode design. By the introduction of a carbon coating and the laser structuring, an enhanced performance of Si anode materials exhibiting high specific capacity (>1200 mAh g-1 over 300 cycles), good rate capability (1170 mAh g-1 at 8 A g-1), and stable cycling is achieved. The morphology of the core-shell active material combined with 3D channel architecture can minimize the volume expansion by utilizing the void space during the repeated cycling.
| Original language | English |
|---|---|
| Pages (from-to) | 13-20 |
| Number of pages | 8 |
| Journal | Journal of Power Sources |
| Volume | 279 |
| DOIs | |
| Publication status | Published - 2015 Apr 1 |
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ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Energy Engineering and Power Technology
- Renewable Energy, Sustainability and the Environment
- Physical and Theoretical Chemistry
Cite this
Three-dimensional silicon/carbon core-shell electrode as an anode material for lithium-ion batteries. / Kim, Jung Sub; Pfleging, Wilhelm; Kohler, Robert; Seifert, Hans Jürgen; Kim, Tae Yong; Byun, Dong Jin; Jung, Hun Gi; Choi, Wonchang; Lee, Joong Kee.
In: Journal of Power Sources, Vol. 279, 01.04.2015, p. 13-20.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Three-dimensional silicon/carbon core-shell electrode as an anode material for lithium-ion batteries
AU - Kim, Jung Sub
AU - Pfleging, Wilhelm
AU - Kohler, Robert
AU - Seifert, Hans Jürgen
AU - Kim, Tae Yong
AU - Byun, Dong Jin
AU - Jung, Hun Gi
AU - Choi, Wonchang
AU - Lee, Joong Kee
PY - 2015/4/1
Y1 - 2015/4/1
N2 - Practical application of silicon anodes for lithium-ion batteries has been mainly hindered because of their low electrical conductivity and large volume change (ca. 300%) occurring during the lithiation and delithiation processes. Thus, the surface engineering of active particles (material design) and the modification of electrode structure (electrode design) of silicon are necessary to alleviate these critical limiting factors. Silicon/carbon core-shell particles (Si@C, material design) are prepared by the thermal decomposition and subsequent three-dimensional (3D) electrode structures (electrode design) with a channel width of 15 μm are incorporated using the laser ablation process. The electrochemical characteristics of 3D Si@C used as the anode material for lithium-ion batteries are investigated to identify the effects of material and electrode design. By the introduction of a carbon coating and the laser structuring, an enhanced performance of Si anode materials exhibiting high specific capacity (>1200 mAh g-1 over 300 cycles), good rate capability (1170 mAh g-1 at 8 A g-1), and stable cycling is achieved. The morphology of the core-shell active material combined with 3D channel architecture can minimize the volume expansion by utilizing the void space during the repeated cycling.
AB - Practical application of silicon anodes for lithium-ion batteries has been mainly hindered because of their low electrical conductivity and large volume change (ca. 300%) occurring during the lithiation and delithiation processes. Thus, the surface engineering of active particles (material design) and the modification of electrode structure (electrode design) of silicon are necessary to alleviate these critical limiting factors. Silicon/carbon core-shell particles (Si@C, material design) are prepared by the thermal decomposition and subsequent three-dimensional (3D) electrode structures (electrode design) with a channel width of 15 μm are incorporated using the laser ablation process. The electrochemical characteristics of 3D Si@C used as the anode material for lithium-ion batteries are investigated to identify the effects of material and electrode design. By the introduction of a carbon coating and the laser structuring, an enhanced performance of Si anode materials exhibiting high specific capacity (>1200 mAh g-1 over 300 cycles), good rate capability (1170 mAh g-1 at 8 A g-1), and stable cycling is achieved. The morphology of the core-shell active material combined with 3D channel architecture can minimize the volume expansion by utilizing the void space during the repeated cycling.
KW - Laser structuring
KW - Surface engineering
KW - Thermal decomposition
KW - Three-dimensional anode
KW - Ultrafast laser
UR - http://www.scopus.com/inward/record.url?scp=84920193735&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84920193735&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2014.12.041
DO - 10.1016/j.jpowsour.2014.12.041
M3 - Article
AN - SCOPUS:84920193735
VL - 279
SP - 13
EP - 20
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -