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Updated: Aug 6, 2025

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

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

Published on: March 7, 2018

Ferrocene-Based Artificial Interfacial Layer for High-Performance Lithium Metal Anodes: Continuous Regulation of Li⁺

Qingyuan Dong¹, Mengran Wang^1,2, Xinjing Huang¹

¹School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China.

ACS Applied Materials & Interfaces

|March 21, 2023

Summary

Researchers developed a tunable hybrid artificial layer to prevent lithium dendrite growth in lithium metal anodes. This innovation enhances battery performance and longevity by controlling lithium ion diffusion.

Keywords:

SEI layer dendrite ferrocene lithium metal anode pouch cell

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Published on: January 20, 2023

Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Lithium metal anodes are crucial for high-energy-density batteries but suffer from dendrite growth, hindering performance.
Existing hybrid artificial layers offer benefits but lack tunable control over lithium ion diffusion.
Developing controllable artificial layers is key to stable lithium metal anode operation.

Purpose of the Study:

To create a tunable hybrid artificial layer for lithium metal anodes.
To investigate the effect of component ratios on lithium ion diffusion and layer properties.
To demonstrate the performance enhancement of lithium metal anodes with the optimized artificial layer.

Main Methods:

Synthesized hybrid artificial layers (LF layers) with varying proportions of LiClO4, PMMA, and ferrocene (Fc).
Characterized the artificial SEI layer's ionic conductivity (Li+ transference number) and mechanical properties (Young's modulus).
Tested Li||Li symmetric cells and pouch cells with LiFePO4 cathodes to evaluate electrochemical performance and stability.

Main Results:

Optimized LF layer achieved a high Li+ transference number (0.66) and Young's modulus (4.8 GPa).
Fc-based artificial SEI layer effectively suppressed lithium dendrite growth and volume changes.
Li||Li symmetric cells showed stable cycling for 1500 hours at 10 mA cm-2.
Pouch cells demonstrated 75% capacity retention after 250 cycles at 0.5C with a high-loading cathode.

Conclusions:

Modulating component proportions in hybrid artificial layers enables tunable control over Li diffusion.
The optimized Fc-based artificial SEI layer significantly improves the stability and performance of lithium metal anodes.
This approach offers a promising strategy for developing next-generation high-performance lithium metal batteries.