Chemically Complex Materials (CCMats) have the potential to reconcile functional design with long-term structural stability and sustainability aspects by exploiting chemical complexity. CCMat protagonists can be found in a wealth of different application fields.
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Chemically complex materials (CCMats) – including high entropy alloys, oxides, and other multi component systems – open up entirely new possibilities in materials development. Their exceptionally broad chemical diversity makes it possible to simultaneously optimize functional performance, structural stability, and sustainability. Yet the vast chemical and structural design space poses major challenges for research and industry alike.
Our new perspective article outlines how this potential can be systematically unlocked. At its core are three complementary design strategies: targeted substitution (SUB), defect engineering (DEF), and diversity management (DIV). Together, they enable the combination of high functionality with long term stability and environmental responsibility – across applications ranging from hydrogen storage, catalysis, and magnetics to optical and electronic materials as well as multifunctional structural systems.
Modern approaches such as computational thermodynamics, microstructure simulations, machine learning, and multimodal characterization are accelerating the discovery and optimization of this material class. At the same time, robust data infrastructures and automated synthesis workflows are emerging, paving the way for systematic, data driven materials design. This perspective article illustrates how chemical complexity can become a central lever for the next generation of sustainable high performance materials.
Chemically complex materials enable sustainable high-performance materials
Current Opinion in Solid State and Materials Science, 2026