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Related Experiment Video

Updated: Jun 23, 2025

Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing

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Trace Fluorinated Carbon Dots Driven Li-Garnet Solid-State Batteries.

Fangjun Zhu¹, Laiqiang Xu^1,2, Xinyu Hu¹

¹State Key Laboratory of Powder Metallurgy, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.

Angewandte Chemie (International Ed. in English)

|June 19, 2024

Summary

This summary is machine-generated.

This study introduces a novel method using fluorinated carbon dots (FCDs) to create a stable interface in garnet solid-state batteries. This approach enhances lithium-ion battery performance and prevents dendrite formation for safer, long-lasting energy storage.

Keywords:

Li dendrite electron leakage fluorinated carbon dots garnet electrolyte interface contact

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Last Updated: Jun 23, 2025

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Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy

Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy

Published on: January 20, 2023

Area of Science:

Materials Science
Electrochemistry
Solid-State Batteries

Background:

Garnet solid-state electrolytes like Li_6.5La₃Zr_1.5Ta_0.5O₁₂ (LLZTO) show promise but suffer from poor Li|garnet contact and electron leakage.
These interfacial issues hinder the practical application of high-performance solid-state batteries.

Purpose of the Study:

To develop a novel garnet-based solid-state battery with enhanced performance.
To address the challenges of poor interfacial contact and electron leakage in garnet solid-state batteries.

Main Methods:

Utilized trace fluorinated carbon dots (FCDs) to engineer the Li|garnet interface.
Employed density functional theory (DFT) calculations to investigate interfacial energy and adhesion.
Fabricated and tested Li-FCD|LLZTO|Li-FCD symmetrical cells and LFP|garnet|Li-FCD full cells.

Main Results:

A Li-FCD composite significantly improved the work of adhesion at the Li|garnet interface, promoting uniform Li⁺ deposition.
A stable C-Li₂O-LiF interfacial layer was spontaneously formed, effectively hindering electron transport and lithium dendrite penetration.
Symmetrical cells demonstrated excellent cycling stability (>3000 hours at 0.3 mA cm^-2), and full cells achieved 91.6% capacity retention after 500 cycles at 1C.

Conclusions:

A novel and effective strategy was established to create a dendrite-free Li|garnet interface using FCDs.
The developed approach significantly enhances the cycling performance and stability of garnet-based solid-state batteries.
This research provides a foundational method for advancing future solid-state battery technologies.