Abstract
Si-Ti-Ni alloy (STN) is a promising active material for lithium ion batteries with high coulombic efficiency and stable cycleability since inactive matrix plays an important role in buffer action against large volume changes of Si during charge/discharge reactions. However, there still remain several challenges to apply to electric vehicles due to capacity fading and unstable cycle performances at high current density. In this study, to improve the properties of STN, we modified the surface of STN with poly(3,4-ethylenedioxythiophene) (PEDOT) by in-situ polymerization. The modified STN provides many advantages including stable cycleability, low charge transfer resistance, strong adhesion between active materials and active material and current collector, etc. Electrochemical performances are significantly improved after modification; especially under high current density conditions.
| Original language | English |
|---|---|
| Pages (from-to) | 247-254 |
| Number of pages | 8 |
| Journal | Electrochimica Acta |
| Volume | 165 |
| DOIs | |
| Publication status | Published - 2015 Feb 28 |
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Keywords
- Lithium battery
- Si-Ti-Ni alloy poly(3,4-Ethylenedioxythiophene)
- Surface modification
ASJC Scopus subject areas
- Electrochemistry
- Chemical Engineering(all)
Cite this
Physico-Chemical and Electrochemical Properties of Si-Ti-Ni Alloy Modified with poly(3,4-ethylenedioxythiophene). / Seo, Hyoree; Kim, Keon; Yi, Cheol Woo.
In: Electrochimica Acta, Vol. 165, 28.02.2015, p. 247-254.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Physico-Chemical and Electrochemical Properties of Si-Ti-Ni Alloy Modified with poly(3,4-ethylenedioxythiophene)
AU - Seo, Hyoree
AU - Kim, Keon
AU - Yi, Cheol Woo
PY - 2015/2/28
Y1 - 2015/2/28
N2 - Si-Ti-Ni alloy (STN) is a promising active material for lithium ion batteries with high coulombic efficiency and stable cycleability since inactive matrix plays an important role in buffer action against large volume changes of Si during charge/discharge reactions. However, there still remain several challenges to apply to electric vehicles due to capacity fading and unstable cycle performances at high current density. In this study, to improve the properties of STN, we modified the surface of STN with poly(3,4-ethylenedioxythiophene) (PEDOT) by in-situ polymerization. The modified STN provides many advantages including stable cycleability, low charge transfer resistance, strong adhesion between active materials and active material and current collector, etc. Electrochemical performances are significantly improved after modification; especially under high current density conditions.
AB - Si-Ti-Ni alloy (STN) is a promising active material for lithium ion batteries with high coulombic efficiency and stable cycleability since inactive matrix plays an important role in buffer action against large volume changes of Si during charge/discharge reactions. However, there still remain several challenges to apply to electric vehicles due to capacity fading and unstable cycle performances at high current density. In this study, to improve the properties of STN, we modified the surface of STN with poly(3,4-ethylenedioxythiophene) (PEDOT) by in-situ polymerization. The modified STN provides many advantages including stable cycleability, low charge transfer resistance, strong adhesion between active materials and active material and current collector, etc. Electrochemical performances are significantly improved after modification; especially under high current density conditions.
KW - Lithium battery
KW - Si-Ti-Ni alloy poly(3,4-Ethylenedioxythiophene)
KW - Surface modification
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UR - http://www.scopus.com/inward/citedby.url?scp=84924599455&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2015.02.056
DO - 10.1016/j.electacta.2015.02.056
M3 - Article
VL - 165
SP - 247
EP - 254
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -