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Updated: Apr 7, 2026
05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
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Electrolyte-Induced Interfacial/Bulk Dual Regulation Enables Negligible Capacity Decay in Li-Rich Cathodes.
Tianqi Yang1, Min Jiang1, Jiatao Lou2
1Department of Physics, City University of Hong Kong, Hong Kong, China.
Advanced Materials (Deerfield Beach, Fla.)
|April 6, 2026
Summary
This study introduces an electrolyte strategy to stabilize lithium-rich manganese-based oxides (LRMO) by preventing capacity decay. The method creates a protective layer, enhancing battery performance and longevity.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Lithium-rich manganese-based oxides (LRMO) exhibit rapid capacity decay due to interfacial instability and Jahn-Teller (J-T) distortion.
- This degradation is exacerbated by surface oxygen activity, non-uniform cathode electrolyte interphase (CEI) formation, and parasitic reactions.
Purpose of the Study:
- To develop an electrolyte-induced dual regulation strategy for interfacial and bulk stabilization in Li-rich cathodes.
- To mitigate capacity decay and enhance the cycle life of LRMO materials.
Main Methods:
- Development of an electrolyte-induced interfacial/bulk dual regulation strategy.
- In situ characterizations and interfacial compositional analyses to study CEI formation.
- Local structural analyses and theoretical calculations to investigate Mn structural changes.
Main Results:
- Formation of a thin, uniform, and robust LiF/LiBO2-rich CEI that stabilizes surface oxygen and suppresses side reactions.
- Fluorinated molecules in the electrolyte alleviate J-T distortion by regulating Mn into a low-spin configuration, preventing bulk degradation.
- LRMO||Li cells demonstrated negligible capacity decay, retaining 97.6% after 400 cycles with an initial capacity of 219.6 mAh g-1.
Conclusions:
- The electrolyte-mediated dual stabilization strategy effectively mitigates capacity decay in Li-rich cathodes.
- This approach provides a new pathway for enhancing the stability and cycle life of advanced battery materials.
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