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Related Experiment Video

Updated: May 9, 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

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Solid Thin-Film Battery Using a Densely Packed LiNi_0.5Mn_1.5O₄ Crystal Layer.

Shigeru Kobayashi¹, Nobuyuki Zettsu^2,3,4, Kazunori Nishio⁵

¹Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan.

|May 5, 2025

Summary

Researchers developed stable solid-state lithium batteries using a high-density LiNi_0.5Mn_1.5O₄ (LNMO) cathode. Annealing significantly reduced interfacial resistance, improving battery performance for future energy storage applications.

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Last Updated: May 9, 2025

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Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

5 V-class LiNi_0.5Mn_1.5O₄ (LNMO) cathodes offer high energy density potential for solid-state lithium batteries.
Achieving stable cycling and high performance in these batteries requires optimized electrode structures and interfaces.

Purpose of the Study:

To investigate the stable cycling performance of solid thin-film lithium batteries utilizing densely packed LNMO crystal layers.
To evaluate the impact of annealing on the interfacial resistance between LNMO and Li₃PO₄ solid electrolyte.

Main Methods:

Fabrication of solid thin-film lithium batteries with densely packed LNMO positive electrodes.
Electrochemical cycling and impedance spectroscopy to assess battery performance and interfacial resistance.
Post-annealing treatment of the assembled battery.

Main Results:

Demonstrated stable cycling of a solid thin-film Li battery with a densely packed LNMO layer.
Annealing reduced the interfacial resistance between Li₃PO₄ solid electrolyte and LNMO by an order of magnitude (from 5.3 × 10² to 5.7 × 10¹ Ωcm²).
Enhanced battery performance was observed after annealing.

Conclusions:

Densely packed LNMO layers are promising for high-performance all-solid-state lithium batteries.
Annealing is an effective method to reduce interfacial resistance and improve battery performance.
This study provides a foundation for developing advanced solid-state batteries with LNMO cathodes.