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Related Experiment Video

Updated: Jun 13, 2026

Thermal Measurement Techniques in Analytical Microfluidic Devices

Thermal Measurement Techniques in Analytical Microfluidic Devices

Published on: June 3, 2015

A portable 3ω setup for thermal measurements.

Nan Chen¹, Li Pan¹, Xiaodong Zhao¹

¹Jiangsu Key Laboratory for Design and Manufacturing of Precision Medicine Equipment, School of Mechanical Engineering, Southeast University, Nanjing 210096, China.

The Review of Scientific Instruments

|June 12, 2026

Summary

This summary is machine-generated.

A new portable 3ω method enables practical in situ measurements for lithium-ion battery analysis and health monitoring. This cost-effective setup significantly reduces instrument size and cost, paving the way for wider applications.

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Area of Science:

Materials Science
Electrical Engineering
Chemical Engineering

Background:

The 3ω method is valuable for in situ and operando measurements, including lithium concentration detection and human health monitoring.
Current 3ω instruments are bulky, expensive, and limit practical applications.
There is a need for more accessible and portable 3ω measurement systems.

Purpose of the Study:

To develop a portable 3ω setup for practical in situ and operando measurements.
To demonstrate the feasibility of this portable setup for lithium-ion battery analysis.
To validate the setup's performance in measuring thermal properties.

Main Methods:

Developed a portable 3ω setup utilizing a data acquisition card.
Integrated a homemade digital phase-sensitive (lock-in) detector for weak signal detection.
Validated the setup by measuring thermal properties of SiO2 and SiO2-film-on-Si samples.
Conducted synthetic experiments for lithium concentration detection in lithium-ion pouch cells.

Main Results:

The portable 3ω setup is significantly smaller, lighter, and cheaper than conventional counterparts.
Successfully measured thermal properties of SiO2 and SiO2-film-on-Si samples.
Demonstrated the feasibility for in situ and operando lithium concentration detection in lithium-ion pouch cells.

Conclusions:

The developed portable 3ω setup offers a practical and cost-effective solution for advanced material characterization.
This innovation facilitates wider adoption of in situ and operando 3ω measurements.
The setup shows promise for real-time monitoring in lithium-ion batteries and other applications.