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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

High-Voltage-Resistant Highly Stable Solid Polymer Electrolyte via In Situ Integrated Construction with Fast Ion

Jianzhou Lin¹, Weijian Xu¹, Weiliang Dong¹

¹College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, P. R. China.

ACS Applied Materials & Interfaces

|January 22, 2025

Summary

A novel high-voltage-resistant polymer electrolyte (HVPE) was developed for solid-state batteries. This advancement enables stable lithium plating and stripping, crucial for next-generation electric aviation energy storage.

Keywords:

cyclic stability high voltage stability lithium metal batteries rapid Li-ion migration solid polymer electrolyte

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Area of Science:

Materials Science
Electrochemistry
Polymer Chemistry

Background:

Electric aviation demands high-energy-density batteries, currently limited by lithium battery technology.
Existing battery technologies face challenges in meeting the stringent requirements for electric aircraft and vehicles.

Purpose of the Study:

To design and fabricate a high-voltage-resistant solid polymer electrolyte (HVPE) for advanced battery applications.
To improve Li+ ion conductivity and electrochemical stability for high-energy-density solid-state batteries.

Main Methods:

Molecular structure design of polymer electrolytes to create fast migration channels.
In situ polymerization technique to fabricate the high-voltage-resistant solid polymer electrolyte (HVPE).
Electrochemical characterization, including Li+ transfer number and electrochemical window measurements.

Main Results:

The developed HVPE demonstrated an ultrahigh Li+ transfer number (tLi+) of 0.92 and an electrochemical window of 5.1 V.
Stable lithium plating and stripping were achieved for over 1000 hours, indicating excellent interfacial stability.
The LCO|HVPE|Li cell showed stable cycling for 500 cycles at 4.5 V with 89.93% capacity retention.

Conclusions:

The proposed HVPE offers a promising solution for high-voltage solid-state polymer batteries.
This work provides new insights into structural design strategies for enhancing energy density in solid-state batteries.
The developed electrolyte is suitable for demanding applications like electric aviation.