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Updated: Jul 13, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

A Dynamically Stable Mixed Conducting Interphase for All-Solid-State Lithium Metal Batteries.

Shuai Li¹, Shi-Jie Yang¹, Gui-Xian Liu²

¹Advanced Research Institute of Multidisciplinary Science, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China.

Advanced Materials (Deerfield Beach, Fla.)

|October 18, 2023

Summary

This summary is machine-generated.

A new self-healing interphase (S-MCI) enhances the stability of sulfide solid electrolytes in all-solid-state lithium metal batteries. This breakthrough improves ion transport and battery lifespan for safer, high-density energy storage.

Keywords:

Li dendrite formation Li metal anode all-solid-state Li metal batteries mixed conducting interphase sulfide electrolytes

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

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Published on: January 20, 2023

Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

All-solid-state lithium metal batteries (ASSLMBs) with sulfide electrolytes offer high safety and energy density.
Instability at the Li metal-sulfide electrolyte interface forms incompetent interphases (SEI, MCI), hindering Li-ion transport and battery performance.

Purpose of the Study:

To develop a dynamically stable mixed conducting interphase (S-MCI) for improved Li metal compatibility with composite sulfide electrolytes.
To address interface degradation and uneven Li deposition in ASSLMBs.

Main Methods:

In situ stress self-limiting reaction to create the S-MCI.
Utilizing composite electrolytes (Li6PS5Cl and Li10GeP2S12) where electrolyte decomposition stress constrains further decomposition.
Characterizing the S-MCI's stability and lithiophilic properties.

Main Results:

The S-MCI demonstrates high dynamical stability and lithiophilic affinity, combining benefits from LPSCl-derived SEI and LGPS-derived MCI.
Li||Li symmetric cells maintained stable operation for 1500 hours.
Li||NCM622 full cells achieved 93.7% capacity retention after 100 cycles.

Conclusions:

The S-MCI effectively stabilizes the Li metal-sulfide electrolyte interface.
This strategy provides a new approach for constructing stable interphases in high-performance ASSLMBs.
The findings pave the way for advanced, safer solid-state batteries.