Effect of the dielectric constant of a liquid electrolyte on lithium metal anodes
Abstract
Lithium metal is considered one of the most promising anode materials for realizing high volumetric and gravimetric energy density, owing to the high specific capacity (~3860 mAh g-1) and the low electrochemical potential of lithium (-3.04 V vs. the standard hydrogen electrode). However, undesirable dendritic lithium growth and corresponding instability of the solid electrolyte interphase prevent safe and long-term use of lithium metal anodes. Here, this paper presents a simple electrolyte approach to enhance the performance of lithium metal batteries by tuning the dielectric constant of the liquid electrolyte. Electrolyte formulations are designed by changing the concentration of ethylene carbonate to have various dielectric constants. This study confirms that high ethylene carbonate content in a liquid electrolyte enhances the cycling performance of lithium metal batteries because the electric field intensity applied to the electrolyte is reduced in relation to the polarization of the electrolyte and thus allows smooth lithium plating and formation of a stable solid electrolyte interphase. Lastly, we believe that this approach provides an important concept for electrolyte system design suitable to lithium metal batteries.
- Authors:
-
- Electronics and Telecommunications Research Institute (ETRI), Daejeon (Republic of Korea)
- Korea Advanced Institute of Science and Technology (KAIST), Daejeon (Republic of Korea)
- EnChem Co., Ltd., Cheonan (Republic of Korea)
- Daegu Gyeongbuk Institute of Science and Technology (DGIST) (Republic of Korea)
- Hanyang Univ., Ansan (Republic of Korea)
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE; National Research Foundation of Korea (NRF)
- OSTI Identifier:
- 1497620
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Electrochimica Acta
- Additional Journal Information:
- Journal Volume: 300; Journal Issue: C; Journal ID: ISSN 0013-4686
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 25 ENERGY STORAGE; dielectric constant; electrolyte; lithium metal anode; lithium metal secondary batteries
Citation Formats
Kim, Ju Young, Shin, Dong Ok, Chang, Taeyong, Kim, Kwang Man, Jeong, Jiseon, Park, Joonam, Lee, Yong Min, Cho, Kuk Young, Phatak, Charudatta, Hong, Seungbum, and Lee, Young-Gi. Effect of the dielectric constant of a liquid electrolyte on lithium metal anodes. United States: N. p., 2019.
Web. doi:10.1016/j.electacta.2019.01.113.
Kim, Ju Young, Shin, Dong Ok, Chang, Taeyong, Kim, Kwang Man, Jeong, Jiseon, Park, Joonam, Lee, Yong Min, Cho, Kuk Young, Phatak, Charudatta, Hong, Seungbum, & Lee, Young-Gi. Effect of the dielectric constant of a liquid electrolyte on lithium metal anodes. United States. https://doi.org/10.1016/j.electacta.2019.01.113
Kim, Ju Young, Shin, Dong Ok, Chang, Taeyong, Kim, Kwang Man, Jeong, Jiseon, Park, Joonam, Lee, Yong Min, Cho, Kuk Young, Phatak, Charudatta, Hong, Seungbum, and Lee, Young-Gi. Thu .
"Effect of the dielectric constant of a liquid electrolyte on lithium metal anodes". United States. https://doi.org/10.1016/j.electacta.2019.01.113. https://www.osti.gov/servlets/purl/1497620.
@article{osti_1497620,
title = {Effect of the dielectric constant of a liquid electrolyte on lithium metal anodes},
author = {Kim, Ju Young and Shin, Dong Ok and Chang, Taeyong and Kim, Kwang Man and Jeong, Jiseon and Park, Joonam and Lee, Yong Min and Cho, Kuk Young and Phatak, Charudatta and Hong, Seungbum and Lee, Young-Gi},
abstractNote = {Lithium metal is considered one of the most promising anode materials for realizing high volumetric and gravimetric energy density, owing to the high specific capacity (~3860 mAh g-1) and the low electrochemical potential of lithium (-3.04 V vs. the standard hydrogen electrode). However, undesirable dendritic lithium growth and corresponding instability of the solid electrolyte interphase prevent safe and long-term use of lithium metal anodes. Here, this paper presents a simple electrolyte approach to enhance the performance of lithium metal batteries by tuning the dielectric constant of the liquid electrolyte. Electrolyte formulations are designed by changing the concentration of ethylene carbonate to have various dielectric constants. This study confirms that high ethylene carbonate content in a liquid electrolyte enhances the cycling performance of lithium metal batteries because the electric field intensity applied to the electrolyte is reduced in relation to the polarization of the electrolyte and thus allows smooth lithium plating and formation of a stable solid electrolyte interphase. Lastly, we believe that this approach provides an important concept for electrolyte system design suitable to lithium metal batteries.},
doi = {10.1016/j.electacta.2019.01.113},
journal = {Electrochimica Acta},
number = C,
volume = 300,
place = {United States},
year = {Thu Jan 24 00:00:00 EST 2019},
month = {Thu Jan 24 00:00:00 EST 2019}
}
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