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Batteries and Fuel Cells

Batteries and Fuel Cells

A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...

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Related Experiment Video

Updated: Jan 6, 2026

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells

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A Novel Button-Type Micro Direct Methanol Fuel Cell with Graphene Diffusion Layer.

Yingli Zhu¹, Lei Gao², Jianyu Li³

¹Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry & Food Machinery and Equipment, School of Mechanical Engineering, Tianjin University of Science & Technology, Tianjin 300384, China. zhuyingli@tust.edu.cn.

|October 2, 2019

Summary

This summary is machine-generated.

A novel button-type micro direct methanol fuel cell (B-μDMFC) eliminates bolts, enhancing energy and power density. This design significantly boosts performance compared to traditional DMFCs.

Keywords:

button-type gas diffusion layer (GDL)graphene micro direct methanol fuel cells (μDMFCs)

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Area of Science:

Electrochemistry
Materials Science
Energy Storage

Background:

Traditional direct methanol fuel cells (DMFCs) suffer from reduced specific energy and power density due to bulky bolt structures.
Optimizing fuel cell design is crucial for improving portable power solutions.

Purpose of the Study:

To design, assemble, and package a novel button-type micro direct methanol fuel cell (B-μDMFC) that overcomes the limitations of traditional DMFC packaging.
To investigate the performance of B-μDMFCs with different structural configurations.

Main Methods:

Fabrication and packaging of four distinct B-μDMFC structures.
Performance testing of B-μDMFCs before and after packaging.
Application of equivalent circuit and methanol diffusion models to analyze experimental data.

Main Results:

The B-μDMFC incorporating 3D graphene and springs demonstrated superior performance.
The novel B-μDMFC design eliminates bolts, increasing the effective cell area ratio.
Achieved a peak volumetric specific power density of 11.85 mW cm^-3.

Conclusions:

The bolt-free B-μDMFC design significantly enhances volumetric power density compared to traditional DMFCs.
The integration of 3D graphene and springs is key to the improved performance of the B-μDMFC.
This innovative packaging approach offers a promising pathway for more efficient micro fuel cell applications.