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Colloidal precipitates

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The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...

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Updated: Jun 5, 2025

Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing

Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing

Published on: March 7, 2018

Constructing a Li₂O/LiZn Mixed Ionic Electron Conductive Layer by Ultrasonic Spraying to Enhance Li/Garnet Solid

Min Gao¹, Pingmei Li¹, Shihao Fu¹

¹State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, Hainan University, 58 Renmin Avenue, Haikou 570228, P. R. China.

ACS Applied Materials & Interfaces

|December 4, 2024

Summary

A novel ZnO interlayer enhances solid-state battery performance by improving lithium metal contact and ionic conductivity. This strategy boosts critical current density and cycle stability for garnet-type solid electrolytes.

Keywords:

interface modification lithium metal battery mixed ionic electron conductive layer solid-state electrolyte ultrasonic spray

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Last Updated: Jun 5, 2025

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

Area of Science:

Materials Science
Electrochemistry
Solid-State Batteries

Background:

Garnet-type Li_6.25Ga_0.25La₃Zr₂O₁₂ (LGLZO) exhibits high ionic conductivity and stability, making it a promising solid electrolyte.
Poor interfacial contact between lithium metal and LGLZO hinders practical application in solid-state batteries.

Purpose of the Study:

To develop an effective method for improving the Li/LGLZO interface contact and electrochemical performance.
To enhance the cycle stability and critical current density of solid-state batteries utilizing LGLZO.

Main Methods:

A zinc oxide (ZnO) layer was deposited onto the LGLZO pellet surface using ultrasonic spraying.
A mixed ionic and electron conductive (MIEC) layer (Li₂O/LiZn) was formed at the Li/LGLZO interface through a conversion reaction between ZnO and molten lithium.
Electrochemical testing and theoretical calculations were employed to analyze interfacial properties and battery performance.

Main Results:

The fabricated MIEC layer significantly improved interfacial contact and optimized interfacial kinetics.
Interface impedance was reduced to 36 Ω cm², and critical current density reached 2.15 mA cm^-2.
Li/ZnO@LGLZO/LiFePO₄ all-solid-state cells demonstrated stable cycling for 100 cycles at 0.5 C.

Conclusions:

The ZnO interlayer and subsequent conversion reaction effectively create a beneficial MIEC layer at the Li/LGLZO interface.
This approach successfully addresses the poor contact issue, leading to enhanced ionic conductivity and Li deposition.
The strategy offers a viable pathway for improving the cycle performance of solid lithium metal batteries.