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

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A Tailored Interface Design for Anode-Free Solid-State Batteries.

Jiayun Wen¹, Tengrui Wang¹, Chao Wang¹

¹Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China.

Advanced Materials (Deerfield Beach, Fla.)

|November 6, 2023

Summary

This summary is machine-generated.

Engineers developed a new interface for anode-free solid-state batteries (AFSSBs) to improve stability and efficiency. This design prevents lithium dendrite growth and enhances performance, paving the way for safer, high-energy batteries.

Keywords:

LiC6 ion-conducting layer LiPAA polymer layer anode-free solid-state batteries interface compatibility

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Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Anode-free solid-state batteries (AFSSBs) offer high safety and energy density but suffer from poor Coulombic efficiency.
Deterioration at the solid electrolyte/current collector interface and lithium dendrite growth limit practical AFSSB applications, particularly with garnet electrolytes.

Purpose of the Study:

To introduce an interfacial engineering strategy for stable and highly efficient garnet-based AFSSBs.
To address the challenges of interface instability and lithium dendrite growth in AFSSBs.

Main Methods:

Engineered the interface between garnet electrolyte and copper foil current collector.
Utilized a LiC₆ layer for high lithium ion conductivity.
Incorporated a lithiated polyacrylic acid polymer layer for interfacial self-adaption.
Regulated lithium deposition through a lithium-silver (Li-Ag) alloying reaction.

Main Results:

Achieved stable long-term operation in the garnet-based AFSSB.
Demonstrated significantly improved Coulombic efficiency and suppressed lithium dendrite growth.
The tailored interface design led to outstanding capacity retention when paired with a LiCoO₂ cathode (3.1 mAh cm^-2).

Conclusions:

The interfacial engineering strategy enhances the stability and efficiency of anode-free solid-state batteries.
This approach offers a viable route for developing next-generation high-safety, high-energy density batteries.
The findings provide critical insights for designing advanced battery architectures.