Physico-Chemical and Electrochemical Properties of Si-Ti-Ni Alloy Modified with poly(3,4-ethylenedioxythiophene)

Hyoree Seo; Keon Kim; Cheol Woo Yi

doi:10.1016/j.electacta.2015.02.056

Physico-Chemical and Electrochemical Properties of Si-Ti-Ni Alloy Modified with poly(3,4-ethylenedioxythiophene)

Hyoree Seo, Keon Kim, Cheol Woo Yi

Honorary professors

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

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	https://doi.org/10.1016/j.electacta.2015.02.056
Publication status	Published - 2015 Feb 28

Keywords

Lithium battery
Si-Ti-Ni alloy poly(3,4-Ethylenedioxythiophene)
Surface modification

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

UN SDGs

This output contributes to the following Sustainable Development Goal(s)

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title = "Physico-Chemical and Electrochemical Properties of Si-Ti-Ni Alloy Modified with poly(3,4-ethylenedioxythiophene)",

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.",

keywords = "Lithium battery, Si-Ti-Ni alloy poly(3,4-Ethylenedioxythiophene), Surface modification",

author = "Hyoree Seo and Keon Kim and Yi, {Cheol Woo}",

note = "Funding Information: This research was supported by a grant from the Fundamental R&D Program for Technology of World Premier Materials funded by the Ministry of Knowledge Economy, Republic of Korea ( 10037919 ). ",

year = "2015",

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doi = "10.1016/j.electacta.2015.02.056",

language = "English",

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pages = "247--254",

journal = "Electrochimica Acta",

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publisher = "Elsevier Limited",

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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

N1 - Funding Information: This research was supported by a grant from the Fundamental R&D Program for Technology of World Premier Materials funded by the Ministry of Knowledge Economy, Republic of Korea ( 10037919 ).

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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U2 - 10.1016/j.electacta.2015.02.056

DO - 10.1016/j.electacta.2015.02.056

M3 - Article

AN - SCOPUS:84924599455

VL - 165

SP - 247

EP - 254

JO - Electrochimica Acta

JF - Electrochimica Acta

SN - 0013-4686

ER -

Physico-Chemical and Electrochemical Properties of Si-Ti-Ni Alloy Modified with poly(3,4-ethylenedioxythiophene)

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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