A September 2026 review in Nature Reviews Materials argues that phase-change materials (PCMs) should be designed across multiple scales—from molecular chemistry to complete thermal-management systems—rather than optimized around latent heat alone.
Why phase-change materials are attractive
PCMs can absorb or release large amounts of heat while operating near a phase-transition temperature. That makes them interesting for electronics cooling, buildings, renewable-energy systems, thermal batteries and other applications where temperature peaks need to be moderated.
The traditional trade-offs
High latent-heat storage does not automatically produce good system performance. Many PCMs have low thermal conductivity, can leak or change shape during cycling, and may face competing requirements for energy density, power density, durability, safety and cost.
A multiscale design problem
The review organizes PCM development from molecular-level tuning through material synthesis, module architecture, device design and system integration. This matters because a material with excellent calorimetric data can still perform poorly if heat cannot be transferred into and out of it quickly enough.
Engineering implication
The next step for PCMs is increasingly about integration: encapsulation, conductive pathways, geometry, interfaces, cycle life and control strategy. That makes thermal-management performance a combined materials-and-system design challenge.
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