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Related Experiment Video

Updated: Sep 14, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Electrolyte Engineering for Rejuvenating Inactive Lithium and Constructing High-Performance Lithium Metal Batteries.

Junqiao Huang¹, Jinhan Li², Zhichuan Shen¹

¹Institute of Batteries, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China.

Small (Weinheim an Der Bergstrasse, Germany)

|July 25, 2025

Summary

This summary is machine-generated.

This study introduces iodobenzene to lithium metal batteries with gel polymer electrolytes. It enhances lithium regeneration and stabilizes the solid-electrolyte interphase (SEI), improving battery performance and longevity.

Keywords:

gel polymer electrolyte inactive Li rejuvenation inorganic‐rich solid electrolyte interphase lithium metal batteries

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Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Lithium metal batteries (LMBs) with gel polymer electrolytes offer high energy density and safety.
Challenges include inactive lithium accumulation and unstable solid-electrolyte interphase (SEI).

Purpose of the Study:

To address inactive lithium accumulation and SEI instability in LMBs.
To improve the cycling performance and capacity retention of LMBs.

Main Methods:

Incorporation of a small amount of iodobenzene as a source of the triiodine/iodine ion (I3-/I-) redox couple.
Experimental characterization and theoretical analysis to understand the redox couple's function.
Fabrication and testing of symmetrical Li batteries and NCM811||Li batteries.

Main Results:

The I3-/I- redox couple actively regenerates lithium and optimizes SEI composition.
Formation of a robust LiI-endorsed and LiF-rich SEI layer.
Symmetrical Li batteries achieved 4000 h of cycling at 0.2 mA cm-2.
NCM811||Li batteries showed 70.31% capacity retention after 720 cycles at 3C and 75.94% after 650 cycles at 4C.

Conclusions:

Iodobenzene effectively mitigates inactive lithium issues and SEI instability.
The engineered electrolyte significantly enhances the long-term cycling stability and performance of lithium metal batteries.