Efficient thermal energy storage technologies based on phase change materials (PCMs) that are capable of reversibly harvesting tremendous thermal energy during the isothermal phase transition have recently received unprecedented attention and are booming explosively in the exploitation of state-of-the-art multifunctional composite PCMs. In this regard, the smart integration of versatile metal oxides into PCMs has made significant contributions. However, a comprehensive review associated with the smart utilization of multifunctional metal oxides in PCMs is lacking. Here, we systematically summarize recent advances concerning the smart utilization of multifunctional metal oxides in PCMs for thermal storage, thermal transfer, energy conversion, and advanced versatile applications. This review aims to provide in-depth insights into the interactive relationships between multifunctional metal oxides and PCMs, thus providing a guide for the target design of high-performance multifunctional composite PCMs. We also highlight the current challenges and possible future research directions.

基于相变材料（PCM）的高效热能存储技术，在等温相变过程中能够可逆地收集巨大的热能，最近受到了前所未有的关注，并且在开发最新的多功能复合PCM中爆炸性地兴起。在这方面，通用金属氧化物到PCM的智能集成做出了重大贡献。然而，缺乏与在PCM中智能利用多功能金属氧化物相关的全面综述。在这里，我们系统地总结了有关PCM中多功能金属氧化物在热存储，热传递，能量转换和高级通用应用中的智能利用的最新进展。这篇综述旨在深入了解多功能金属氧化物与PCM之间的相互作用关系，从而为高性能多功能复合PCM的目标设计提供指导。我们还将重点介绍当前的挑战和可能的未来研究方向。