Phase change materials (PCMs) have garnered intensive attention due to their high energy density and stable energy output in the field of thermal energy storage. However, the low thermal conductivity (TC) and liquid phase leakage of PCMs during phase transition significantly prevent widespread applications. Recently, two-dimensional (2D) materials are being extensively applied in improving the performance of PCMs, relying on their ultrahigh TC and excellent loading capacity. Importantly, their superior optical and electrical properties can offer PCMs with multi-responsive thermal energy conversion. This review summarizes the latest developments, emerging trends and challenges of 2D materials for advanced PCMs. We proceed from the importance of thermal energy storage and the key roles of 2D materials in the performance improvement of PCMs. Then, the fundamentals related to energy storage and thermal conduction mechanism of PCMs is systematic discussed. Further, the major preparation strategies and the major applications of 2D materials-based PCMs are emphasized in the thermal management of lithium-ion battery, solar-thermal, solar-thermal-electric and electro-thermal conversion and storage. Finally, the challenges and emerging perspectives are envisaged for deepening the future study and extending the applications of 2D materials for high-performance PCMs.

相变材料（PCMs）以其高能量密度和稳定的能量输出在热能储存领域受到广泛关注。然而，相变期间相变过程中相变材料的低热导率（TC）和液相泄漏严重阻碍了其广泛应用。近年来，二维 (2D) 材料凭借其超高的 TC 和出色的负载能力，被广泛应用于提高 PCM 的性能。重要的是，它们卓越的光学和电学特性可以为 PCM 提供多响应热能转换。本综述总结了用于先进 PCM 的二维材料的最新发展、新兴趋势和挑战。我们从热能存储的重要性和二维材料在 PCM 性能改进中的关键作用出发。然后，系统讨论了与 PCM 的能量存储和热传导机制相关的基础知识。此外，还强调了基于二维材料的 PCM 的主要制备策略和主要应用在锂离子电池的热管理、太阳能-热、太阳能-热-电和电-热转换和存储方面。最后，展望了深化未来研究和扩展二维材料在高性能 PCM 中的应用所面临的挑战和新兴观点。太阳能-热-电和电-热转换和存储。最后，展望了深化未来研究和扩展二维材料在高性能 PCM 中的应用所面临的挑战和新兴观点。太阳能-热-电和电-热转换和存储。最后，展望了深化未来研究和扩展二维材料在高性能 PCM 中的应用所面临的挑战和新兴观点。