Electrode potential influences the reversibility of lithium-metal anodes

Seongjae Ko, Tomohiro Obukata, Tatau Shimada, Norio Takenaka, Masanobu Nakayama, Atsuo Yamada () and Yuki Yamada ()
Additional contact information
Seongjae Ko: The University of Tokyo
Tomohiro Obukata: The University of Tokyo
Tatau Shimada: The University of Tokyo
Norio Takenaka: The University of Tokyo
Masanobu Nakayama: Nagoya Institute of Technology
Atsuo Yamada: The University of Tokyo
Yuki Yamada: The University of Tokyo

Nature Energy, 2022, vol. 7, issue 12, 1217-1224

Abstract: Abstract Lithium-metal batteries are a promising technology to address the emerging demand for high-energy-density storage systems. However, their cycling encounters a low Coulombic efficiency (CE) due to the unceasing electrolyte decomposition. Improving the stability of solid electrolyte interphase (SEI) suppresses the decomposition and increases CE. However, SEI morphology and chemistry alone cannot account for CE, and a full explanation is still lacking. Here we report that in diverse electrolytes, the large shift (>0.6 V) in the Li electrode potential and its association with the Li+ coordination structure influence the CE. Machine learning regression analysis and vibrational spectroscopy revealed that the formation of ion pairs is essential for upshifting the Li electrode potential, that is, for weakening the reducing ability of Li, which would lead to a high CE with diminished electrolyte decomposition. Various electrolytes with enhanced ion-pairing solution structure are designed to enable a significantly improved CE (>99%).

Date: 2022
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41560-022-01144-0 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natene:v:7:y:2022:i:12:d:10.1038_s41560-022-01144-0

Ordering information: This journal article can be ordered from
https://www.nature.com/nenergy/

DOI: 10.1038/s41560-022-01144-0

Access Statistics for this article

Nature Energy is currently edited by Fouad Khan

More articles in Nature Energy from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().