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Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material

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Published on: February 5, 2019

A New Design Strategy for Observing Lithium Oxide Growth-Evolution Interactions Using Geometric Catalyst Positioning.

Won-Hee Ryu^1,2, Forrest S Gittleson^1,3, Jinyang Li¹

¹Department of Chemical and Environmental Engineering, Yale University , 9 Hillhouse Avenue, New Haven, Connecticut 06511, United States.

|June 22, 2016

Summary

Dispersing palladium catalysts away from the oxygen electrode in lithium-oxygen batteries prevents deactivation. This strategy enhances reaction reversibility and improves energy storage performance.

Keywords:

Lithium−oxygen batteries catalytic membrane nanoparticles oxygen evolving catalyst product morphology

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Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Lithium-oxygen (Li-O2) batteries offer high energy density but face challenges with catalyst deactivation.
Catalytic sites on oxygen electrodes are prone to passivation by solid lithium-oxide products, limiting battery life.

Purpose of the Study:

To investigate a novel approach for alleviating catalyst deactivation in Li-O2 batteries.
To explore the effect of dispersing palladium (Pd) catalytic sites within an anodic aluminum oxide (AAO) membrane interlayer.

Main Methods:

Utilizing a structured AAO membrane to position Pd catalysts away from the oxygen electrode surface.
Analyzing product growth and evolution in Li-O2 cells using cross-sectional characterization.
Employing ex situ X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy for detailed analysis.

Main Results:

Dispersing Pd catalysts within the AAO interlayer significantly improves reaction reversibility.
Catalyst placement away from the electrode surface prevents passivation by solid products.
Geometric decoration of catalysts facilitates the oxidation reaction via PdO surface coordination.

Conclusions:

Positioning catalysts away from the electrode surface is a viable strategy to overcome deactivation in Li-O2 batteries.
This method enhances the electrochemical performance and longevity of Li-O2 energy storage devices.