High-Entropy Electrolytes for Lithium-Ion Batteries

Qidi Wang*, Jianlin Wang, Jouke R. Heringa, Xuedong Bai, Marnix Wagemaker*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

30 Downloads (Pure)

Abstract

One of the primary challenges to improving lithium-ion batteries lies in comprehending and controlling the intricate interphases. However, the complexity of interface reactions and the buried nature make it difficult to establish the relationship between the interphase characteristics and electrolyte chemistry. Herein, we employ diverse characterization techniques to investigate the progression of electrode-electrolyte interphases, bringing forward opportunities to improve the interphase properties by what we refer to as high-entropy solvation disordered electrolytes. Through formulating an electrolyte with a regular 1.0 M concentration that includes multiple commercial lithium salts, the solvation interaction with lithium ions alters fundamentally. The participation of several salts can result in a weaker solvation interaction, giving rise to an anion-rich and disordered solvation sheath despite the low salt concentration. This induces a conformal, inorganic-rich interphase that effectively passivates electrodes, preventing solvent co-intercalation. Remarkably, this electrolyte significantly enhances the performance of graphite-containing anodes paired with high-capacity cathodes, offering a promising avenue for tailoring interphase chemistries.

Original languageEnglish
Pages (from-to)3796-3806
Number of pages11
JournalACS Energy Letters
Volume9
Issue number8
DOIs
Publication statusPublished - 2024

Fingerprint

Dive into the research topics of 'High-Entropy Electrolytes for Lithium-Ion Batteries'. Together they form a unique fingerprint.

Cite this