Insight Into High Entropy Compounds: Advances, Challenges and Energy Applications

High‐entropy compounds, with their unique structural characteristics enabled by high‐entropy configurations, have shown great promise in energy chemistry applications. However, the inherent complexity of multi‐principal‐component systems presents significant challenges, hindering their practical advancement. Key issues include uncertainties about the role of individual elements within the system, limited understanding of dynamic structural evolution mechanisms, and difficulties in identifying the root causes of performance degradation. To tackle these challenges, recent progress, ongoing obstacles, and applications of high‐entropy compounds in energy chemistry are systematically reviewed. By analyzing the four core effects, mechanisms of representative cases, and diverse applications, the intrinsic relationships between structure, properties, and performance are clarified. Finally, future opportunities, challenges, and potential directions for advancing high‐entropy compounds in energy‐related applications are outlined.