《自然》(20260108出版)一周论文导读—新闻—科学网

▲ Abstract:

DHere we report a strategy to boost the charging rates without sacrificing energy density,自然周论 based on a rational design of a composite coating that enables slip-enhanced close-contact melting (sCCM) inside sealed thermal batteries. Using organic PCMs, we demonstrate a record-high power density of 1,100 ± 2% kW m-3 in a prototype. Our coating design integrates a pulse-heated (PH) layer that premelts the PCM to initiate CCM, together with a liquid-like slip surface that ensures unimpeded sinking of the remaining solid and sustains the sCCM mode throughout charging. We develop a model to explain how the slip surface enhances the charging rate. With high cycling life, adaptability and scalability, this strategy is generalizable to diverse PCMs, enabling high-performance thermal energy storage over a wide range of temperatures.