Highly Ductile N-Type Thermoelectric MOF-Based Foams

Area of Science:

• Materials Science
• Energy Harvesting
• Nanotechnology

Background:

• Flexible thermoelectric materials are crucial for wearable electronics and power sources.
• Metal-organic frameworks (MOFs) offer tunable properties for thermoelectrics.
• A lack of effective n-type flexible thermoelectric materials limits device applications.

Purpose of the Study:

• To develop a novel, high-performance n-type flexible thermoelectric material.
• To address the limitations of existing n-type thermoelectric materials.
• To enable efficient thermal energy harvesting in flexible devices.

Main Methods:

• In situ synthesis and surface grafting of Nickel-Copper-MOF@Polyaniline/Nickel foam (NCM@PANI/NF).
• Characterization of thermoelectric properties, including Seebeck coefficient, electrical conductivity, and thermal conductivity.
• Fabrication of a flexible thermoelectric device array.

Main Results:

• The NCM@PANI/NF material achieved a Seebeck coefficient of -53.1 μV·K⁻¹, electrical conductivity of 872.39 S·m⁻¹, and thermal conductivity of 0.126 W·m⁻¹·K⁻¹.
• The material demonstrated superior comprehensive properties compared to existing n-type MOF-based thermoelectrics.
• The flexible device array effectively adapted to various heat source shapes for energy harvesting.

Conclusions:

• The developed NCM@PANI/NF is a promising n-type flexible thermoelectric material.
• This work offers a viable strategy for enhancing MOF-based thermoelectric performance and design.
• The material facilitates efficient thermal energy harvesting for flexible power generation.