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Updated: Jan 13, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

A ductile solid electrolyte interphase for solid-state batteries.

Jinshuo Mi^1,2, Jun Yang^1,2, Likun Chen^1,2

¹Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center, Guangdong Provincial Key Laboratory of Thermal Management Engineering & Materials, Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China.

|October 30, 2025

Summary

This summary is machine-generated.

Researchers developed a ductile solid-electrolyte interphase (SEI) for solid-state lithium metal batteries. This new SEI enables stable cycling at high current densities and capacities, overcoming key limitations in battery performance.

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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

Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Solid-state lithium metal batteries face challenges like brittle solid-electrolyte interphases (SEI) hindering ion transport and causing dendrite formation.
Current solid-state electrolytes struggle with long cycle life above 1 mA cm⁻² current density and 1 mAh cm⁻² areal capacity.

Purpose of the Study:

To engineer a ductile inorganic-rich SEI that maintains structural integrity and facilitates high lithium-ion transport.
To improve the performance and cycle life of solid-state lithium metal batteries under demanding conditions.

Main Methods:

A substitution reaction between Li₂S/LiF in the SEI and AgNO₃ in dielectric composite electrolytes was employed.
The resulting SEI incorporated Ag₂S and AgF components to enhance ductility and ionic conductivity.

Main Results:

The ductile SEI demonstrated stable cycling for over 4,500 hours at 15 mA cm⁻² and 15 mAh cm⁻².
The SEI maintained performance over 7,000 hours at -30°C under practical conditions (5 mA cm⁻², 5 mAh cm⁻²).

Conclusions:

A ductile inorganic-rich SEI effectively addresses the limitations of brittle SEIs in solid-state batteries.
This advancement enables high-performance, long-cycle-life solid-state lithium metal batteries, even at low temperatures.