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Advancing Thermal Energy Storage: Synthesis and Thermal Performance of Silica-Encapsulated Paraffin PCMs
Raihana Jannat Adnin1, Han-Seung Lee2
1Department of Smart City Engineering, Hanyang University, 1271 Sa 3-dong, Sangnok-gu, Ansan-si 15588, Republic of Korea.
Molecules (Basel, Switzerland)
|May 7, 2025
Summary
This study developed novel silica-encapsulated nano-phase change materials (NPCMs) for thermal energy storage. The synthesized materials show excellent thermal stability, high energy storage capacity, and long-term durability.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Phase change materials (PCMs) are crucial for thermal energy storage (TES).
- Encapsulation is necessary to improve PCMs' thermal stability and prevent leakage.
- Nano-encapsulation offers enhanced performance characteristics for TES applications.
Purpose of the Study:
- To synthesize and characterize silica-encapsulated nano-phase change materials (NPCMs) using paraffin as the core.
- To evaluate the thermal properties, stability, and energy storage capacity of the synthesized NPCMs.
- To assess the potential of these NPCMs for efficient and sustainable thermal energy storage.
Main Methods:
- Sol-gel method for synthesizing SiO2-encapsulated paraffin NPCMs.
- FTIR, XRD, and XPS for structural and chemical validation.
- SEM for morphology analysis, TGA for thermal stability, and DSC for thermal performance evaluation.
Main Results:
- Successful synthesis of spherical SiO2-encapsulated NPCMs with a core-shell structure.
- PARSI-4 (4:1 paraffin/SiO2 ratio) showed the smallest particle size (190 nm) and highest enthalpies.
- High encapsulation ratio (87.83%) and efficiency (87.04%) achieved, with excellent thermal stability and 98.16% enthalpy retention after 100 cycles.
Conclusions:
- SiO2-encapsulated NPCMs exhibit enhanced thermal stability and superior energy storage performance.
- The synthesized materials demonstrate excellent structural integrity and long-term cycling stability.
- These NPCMs are promising for efficient thermal energy storage in sustainable and energy-efficient applications.
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