Robust battery interphases from dilute fluorinated cations

Chulgi Nathan Hong, Mengwen Yan, Oleg Borodin, Travis P. Pollard, Langyuan Wu, Manuel Reiter, Dario Gomez Vazquez, Katharina Trapp, Ji Mun Yoo, Netanel Shpigel, Jeremy I. Feldblyum, Maria R. Lukatskaya

Research output: Contribution to journalArticlepeer-review

Abstract

Controlling solid electrolyte interphase (SEI) in batteries is crucial for their efficient cycling. Herein, we demonstrate an approach to enable robust battery performance that does not rely on high fractions of fluorinated species in electrolytes, thus substantially decreasing the environmental footprint and cost of high-energy batteries. In this approach, we use very low fractions of readily reducible fluorinated cations in electrolyte (∼0.1 wt%) and employ electrostatic attraction to generate a substantial population of these cations at the anode surface. As a result, we can form a robust fluorine-rich SEI that allows for dendrite-free deposition of dense Li and stable cycling of Li-metal full cells with high-voltage cathodes. Our approach represents a general strategy for delivering desired chemical species to battery anodes through electrostatic attraction while using minute amounts of additive.

Original languageEnglish
Pages (from-to)4137-4146
Number of pages10
JournalEnergy and Environmental Science
Volume17
Issue number12
DOIs
StatePublished - 2 May 2024

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