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Updated: Jun 23, 2025

$In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries$

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Published on: November 10, 2014

Robust battery interphases from dilute fluorinated cations.

Chulgi Nathan Hong¹, Mengwen Yan², Oleg Borodin³

¹Electrochemical Energy Systems Laboratory, Department of Mechanical and Process Engineering, ETH Zurich Zürich 8092 Switzerland mlukatskaya@ethz.ch.

Energy & Environmental Science

|June 20, 2024

Summary

This summary is machine-generated.

Researchers developed a new battery strategy using minimal fluorinated additives to create a robust solid electrolyte interphase (SEI). This enhances battery performance and reduces environmental impact for high-energy batteries.

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

Area of Science:

Electrochemistry
Materials Science
Energy Storage

Background:

Controlling the solid electrolyte interphase (SEI) is critical for efficient battery cycling and longevity.
High-energy batteries often rely on fluorinated species in electrolytes, increasing cost and environmental concerns.

Purpose of the Study:

To develop a cost-effective and environmentally friendly approach for robust SEI formation in batteries.
To enable stable cycling of high-energy, lithium-metal full cells using minimal additive fractions.

Main Methods:

Utilizing very low concentrations (∼0.1 wt%) of readily reducible fluorinated cations in the electrolyte.
Employing electrostatic attraction to concentrate these cations at the anode surface for SEI formation.

Main Results:

Formation of a robust, fluorine-rich SEI layer on the anode.
Achieved dendrite-free deposition of dense lithium and stable cycling of Li-metal full cells with high-voltage cathodes.

Conclusions:

The proposed method offers a general strategy for targeted delivery of chemical species to battery anodes via electrostatic attraction.
This approach significantly reduces the reliance on high fractions of fluorinated additives, lowering environmental footprint and cost.