Wei Zechang, Zhang Yaoxin, Cai Chenyang, Qu Hao, Fu Yu, Tan Swee Ching
Co-Innovation Center of Efficient Processing and Utilization of Forest Resource, School of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China.
China-UK Low Carbon College, Shanghai Jiao Tong University, 3 Yinlian Road, Shanghai, 201306, China.
Small. 2023 Nov;19(46):e2302886. doi: 10.1002/smll.202302886. Epub 2023 Jul 23.
Eutectic Gallium-Indium (EGaIn) liquid metal is an emerging phase change metal material, but its low phase transition enthalpy and low light absorption limit its application in photothermal phase change energy storage materials (PCMs) field. Here, based on the dipole layer mechanism, stearic acid (STA)-EGaIn-based PCMs which exhibit extraordinary solar-thermal performance and phase change enthalpy are fabricated by ball milling method. The wood lamella-inspired cellulose-derived aerogel and molybdenum disulfide (MoS ) are used to support the PCMs by the capillary force and decrease the interfacial thermal resistance. The resulted PCMs achieved excellent photothermal conversion performance and leakage proof. They have excellent thermal conductivity of 0.31 W m K (this is increased by 138% as compared with pure STA), and high phase change enthalpy of187.50 J g , which is higher than the most of the reported PCMs. Additionally, the thermal management system and infrared stealth materials based on the PCMs are developed. This work provides a new way to fabricate smart EGaIn-based PCMs for energy storage device thermal management and infrared stealth.
共晶镓铟（EGaIn）液态金属是一种新兴的相变金属材料，但其低相变焓和低光吸收率限制了其在光热相变储能材料（PCM）领域的应用。在此，基于偶极层机制，通过球磨法制备了具有优异太阳热性能和相变焓的硬脂酸（STA）-EGaIn基PCM。受木片启发的纤维素衍生气凝胶和二硫化钼（MoS）用于通过毛细力支撑PCM并降低界面热阻。所得PCM实现了优异的光热转换性能和防泄漏性能。它们具有0.31 W m⁻¹ K⁻¹的优异热导率（与纯STA相比提高了138%），以及187.50 J g⁻¹的高相变焓，高于大多数已报道的PCM。此外，还开发了基于PCM的热管理系统和红外隐身材料。这项工作为制造用于储能设备热管理和红外隐身的智能EGaIn基PCM提供了一种新方法。
