Hierarchical porous kaolinite microspheres for leakage-resistant and high-conductivity phase change composites in advanced thermal energy storage
Source abstract
Abstract
The growing global energy demand and environmental concerns necessitate innovative thermal energy storage solutions. Phase change materials (PCMs), particularly organic PCMs like stearic acid (SA), offer high latent heat storage capacity but face challenges such as leakage and low thermal conductivity. This study presents a novel strategy to synthesize hierarchical porous honeycomb kaolinite (HPCK) microspheres via spray drying, calcination, and hydrothermal reconstruction for encapsulating SA. The HPCK/SA composite form-stable PCM (CFSPCM) demonstrates superior thermal performance, with a melting enthalpy of 104.6 J/g and crystallization enthalpy of 105.4 J/g, alongside enhanced shape stability and thermal conductivity (0.51 W/m·K). Structural characterization reveals that HPCK`s hierarchical porosity (BET surface area of 220.1 m 2/g, 0.76 cm 3/g pore volume) effectively immobilizes SA through physical interactions, preventing leakage even at 90 °C. Cyclic stability tests confirm retention of 90 % latent heat after 200 thermal cycles. This work advances the design of clay-based CFSPCMs for scalable applications in building thermal management, solar energy storage, and industrial waste heat recovery.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Phase Change Materials Research · Adsorption and Cooling Systems · Solar Thermal and Photovoltaic Systems
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
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