Performance and thermal stability of LiCoO2 cathode modified with ionic liquid

Sang Young Lee; Hyun Hang Yong; Seok Koo Kim; Je Young Kim; Soonho Ahn

doi:10.1016/j.jpowsour.2005.03.165

Performance and thermal stability of LiCoO₂ cathode modified with ionic liquid

Sang Young Lee, Hyun Hang Yong, Seok Koo Kim, Je Young Kim, Soonho Ahn

Department of Chemical and Biomolecular Engineering

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

14 Citations (Scopus)

Abstract

A unique approach for improving the thermal stability of LiCoO₂ cathode is presented, which is based on the treatment of LiCoO₂ with ionic liquid (BDMIPF₆, butyldimethylimidazolium-hexafluorophosphate), instead of traditional electrolyte modification. The electrolyte modification by the BDMIPF₆ addition deteriorates the C-rate performances especially at high charge/discharge rates, with slightly improving the exothermic reaction between delithiated (charged) LiCoO₂ and electrolytes. On the other hand, the BDMIPF₆-modified cathode noticeably improves the thermal stability as well as little changes the C-rate performances. This is believed mainly due to the preferential location of BDMIPF₆ in the LiCoO₂ cathode rather than in the carbon anode, which might make it possible that the BDMIPF₆ could effectively contribute to the suppression of exothermic reaction of delithiated LiCoO₂ with electrolytes, with little affecting the electrolyte and the carbon anode.

Original language	English
Pages (from-to)	732-735
Number of pages	4
Journal	Journal of Power Sources
Volume	146
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jpowsour.2005.03.165
Publication status	Published - 2005 Aug 26

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2005.03.165

Cite this

@article{183639acd31f49ebaef7cfe8f7348f54,

title = "Performance and thermal stability of LiCoO2 cathode modified with ionic liquid",

abstract = "A unique approach for improving the thermal stability of LiCoO2 cathode is presented, which is based on the treatment of LiCoO2 with ionic liquid (BDMIPF6, butyldimethylimidazolium-hexafluorophosphate), instead of traditional electrolyte modification. The electrolyte modification by the BDMIPF6 addition deteriorates the C-rate performances especially at high charge/discharge rates, with slightly improving the exothermic reaction between delithiated (charged) LiCoO2 and electrolytes. On the other hand, the BDMIPF6-modified cathode noticeably improves the thermal stability as well as little changes the C-rate performances. This is believed mainly due to the preferential location of BDMIPF6 in the LiCoO2 cathode rather than in the carbon anode, which might make it possible that the BDMIPF6 could effectively contribute to the suppression of exothermic reaction of delithiated LiCoO2 with electrolytes, with little affecting the electrolyte and the carbon anode.",

author = "Lee, {Sang Young} and Yong, {Hyun Hang} and Kim, {Seok Koo} and Kim, {Je Young} and Soonho Ahn",

year = "2005",

month = aug,

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doi = "10.1016/j.jpowsour.2005.03.165",

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journal = "Journal of Power Sources",

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TY - JOUR

T1 - Performance and thermal stability of LiCoO2 cathode modified with ionic liquid

AU - Lee, Sang Young

AU - Yong, Hyun Hang

AU - Kim, Seok Koo

AU - Kim, Je Young

AU - Ahn, Soonho

PY - 2005/8/26

Y1 - 2005/8/26

N2 - A unique approach for improving the thermal stability of LiCoO2 cathode is presented, which is based on the treatment of LiCoO2 with ionic liquid (BDMIPF6, butyldimethylimidazolium-hexafluorophosphate), instead of traditional electrolyte modification. The electrolyte modification by the BDMIPF6 addition deteriorates the C-rate performances especially at high charge/discharge rates, with slightly improving the exothermic reaction between delithiated (charged) LiCoO2 and electrolytes. On the other hand, the BDMIPF6-modified cathode noticeably improves the thermal stability as well as little changes the C-rate performances. This is believed mainly due to the preferential location of BDMIPF6 in the LiCoO2 cathode rather than in the carbon anode, which might make it possible that the BDMIPF6 could effectively contribute to the suppression of exothermic reaction of delithiated LiCoO2 with electrolytes, with little affecting the electrolyte and the carbon anode.

AB - A unique approach for improving the thermal stability of LiCoO2 cathode is presented, which is based on the treatment of LiCoO2 with ionic liquid (BDMIPF6, butyldimethylimidazolium-hexafluorophosphate), instead of traditional electrolyte modification. The electrolyte modification by the BDMIPF6 addition deteriorates the C-rate performances especially at high charge/discharge rates, with slightly improving the exothermic reaction between delithiated (charged) LiCoO2 and electrolytes. On the other hand, the BDMIPF6-modified cathode noticeably improves the thermal stability as well as little changes the C-rate performances. This is believed mainly due to the preferential location of BDMIPF6 in the LiCoO2 cathode rather than in the carbon anode, which might make it possible that the BDMIPF6 could effectively contribute to the suppression of exothermic reaction of delithiated LiCoO2 with electrolytes, with little affecting the electrolyte and the carbon anode.

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