Latent heat storage provides an efficient pathway to address the intermittent energy supply of solar irradiation as an energy source. Conventional organic phase change materials (PCMs) for latent heat storage possess the advantage of the high latent heat, but suffer from the poor sunlight absorption capacity and low thermal conductivity. Carbon foam (CF) has excellent sunlight absorption and superior porous properties, and copper nanoparticles (Cu) have superb thermal conductivity. In this study, a composite photothermal material, CF/Cu, was fabricated by in-situ growth of copper (Cu) nanoparticles on carbon foam (CF) surfaces via aqueous copper plating strategy. The adhesion properties of polydopamine (PDA) facilitated the in-situ growth process. CF/Cu was employed as a porous matrix for the encapsulation of octadecanol (OC), and a composite photothermal PCM (CF/Cu/OC) with superb photothermal conversion performance and high thermal conductivity was successfully prepared. The composite photothermal PCM containing 80 wt% OC showed a photothermal conversion efficiency of 81.6 % and a thermal conductivity of 3.17 W m K. The synergistic interaction between CF and Cu within CF/Cu/OC resulted in a dramatic improvement in photothermal conversion of CF/Cu/OC. In addition, CF/Cu/OC95 exhibits excellent thermal storage performance with the melting enthalpy reached 270.8 J g.

中文翻译：

---

聚多巴胺/铜纳米粒子协同改性碳泡沫/十八醇复合相变材料用于光热能转换和储存


潜热储存为解决太阳辐射作为能源的间歇性供能问题提供了一条有效途径。传统的潜热储存有机相变材料（PCM）具有高潜热的优点，但存在阳光吸收能力差和导热系数低的问题。泡沫碳（CF）具有优异的阳光吸收性和优异的多孔特性，而铜纳米颗粒（Cu）则具有优异的导热性。在这项研究中，通过水性镀铜策略在碳泡沫（CF）表面上原位生长铜（Cu）纳米粒子，制备了复合光热材料CF/Cu。聚多巴胺（PDA）的粘附特性促进了原位生长过程。采用CF/Cu作为多孔基体封装十八醇(OC)，成功制备出具有优异光热转换性能和高导热率的复合光热相变材料(CF/Cu/OC)。含有 80 wt% OC 的复合光热 PCM 的光热转换效率为 81.6%，热导率为 3.17 W·m·K。CF/Cu/OC 中 CF 和 Cu 之间的协同相互作用导致 CF 的光热转换显着提高。 /铜/OC。此外，CF/Cu/OC95表现出优异的蓄热性能，熔化热达到270.8 J g。