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Related Experiment Video

Updated: Jul 11, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Crystal Structure Engineering Enables Enhanced Ionic Conductivity in LAGP Solid-State Electrolytes.

Miaomiao Lyu¹, Ying Li², Chao Zhang¹

¹University of Science and Technology Beijing, Beijing, China.

Chemistry (Weinheim an Der Bergstrasse, Germany)

|March 28, 2025

Summary

Researchers enhanced solid-state lithium batteries (SSLBs) by engineering the crystal structure of lithium aluminum germanium phosphate (LAGP) electrolytes. Using γ-Al2O3 improved ionic conductivity, a key factor for better battery performance and safety.

Keywords:

LAGP crystal structure engineering energy conversion ionic conductivity solid‐state structures γ‐Al2O3

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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

Area of Science:

Materials Science
Electrochemistry
Solid-State Batteries

Background:

Solid-state lithium batteries (SSLBs) offer enhanced safety and energy density over liquid-electrolyte counterparts.
NASICON-type lithium aluminum germanium phosphate (LAGP) is a promising solid electrolyte due to its air stability and electrochemical window.
Low ionic conductivity in LAGP hinders its practical application.

Purpose of the Study:

To improve the ionic conductivity of LAGP solid electrolytes.
To investigate crystal structure engineering using different aluminum sources.
To enhance the performance of solid-state lithium batteries.

Main Methods:

Utilized γ-Al2O3 instead of α-Al2O3 as the aluminum source for LAGP synthesis.
Analyzed the effect of γ-Al2O3 on Al3+ incorporation and Li+ concentration.
Evaluated changes in bulk and grain boundary conductivity through structural and electrochemical analysis.

Main Results:

Increased Al3+ incorporation into the LAGP framework due to γ-Al2O3's higher reactivity.
Enhanced free Li+ concentration at M2 sites, boosting bulk ionic conductivity.
Reduced AlPO4 impurities and improved morphological uniformity, optimizing grain boundary conductivity.
Achieved a threefold enhancement in lithium-ion conductivity, reaching 6.04 × 10^-4 S cm^-1 (total) and 2.77 × 10^-3 S cm^-1 (intracrystalline).

Conclusions:

Crystal structure engineering with γ-Al2O3 effectively enhances LAGP ionic conductivity.
The optimized LAGP demonstrates significant potential for advanced solid-state battery applications.
This strategy offers a pathway to overcome limitations in current solid electrolyte performance.