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Updated: Feb 20, 2026
05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
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Li+/H+ Exchange in Solid-State Oxide Li-Ion Conductors
Zhuohan Li1, Benjamin X Lam2, Shilong Wang2
1Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
ACS Energy Letters
|February 19, 2026
Summary
Oxide Li-ion conductors for solid-state batteries can degrade via proton exchange. Garnets are susceptible, while NASICONs show better stability, highlighting a conductivity-stability trade-off in material design.
Area of Science:
- Materials Science
- Electrochemistry
- Computational Chemistry
Background:
- Oxide lithium-ion conductors are crucial for solid-state batteries.
- While generally water-resistant, they can undergo detrimental lithium/proton exchange (LHX).
Purpose of the Study:
- To investigate the thermodynamic driving force of LHX in garnets and NASICONs.
- To understand the factors influencing moisture stability in oxide Li-ion conductors.
Main Methods:
- Density Functional Theory (DFT) calculations.
- Machine-learning interatomic potential modeling.
- Thermodynamic analysis of LHX reaction.
Main Results:
- Li-stuffed garnets show a high driving force for LHX due to elevated Li chemical potential.
- NASICONs exhibit greater resistance to LHX, attributed to lower Li chemical potential and O-H bond characteristics.
- A trade-off exists between enhanced conductivity via Li stuffing and increased moisture susceptibility.
Conclusions:
- Material design must balance high ionic conductivity with environmental stability.
- Understanding LHX is critical for developing durable solid-state battery electrolytes.
- NASICON structures offer a promising direction for moisture-stable oxide Li-ion conductors.
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