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基于3D木质素衍生的多孔碳的相变材料复合材料,通过现场激活来制备,用于高效的太阳能驱动的能量转换和储存

Xingyun Ye¹, Dongjie Yang¹, Lanlan Yu¹

¹School of Chemistry and Chemical Engineering, Guangdong Provincial Engineering Research Center for Green Fine Chemicals, South China University of Technology, Guangzhou 510641, China.

Journal of colloid and interface science

|September 12, 2024

概括

研究人员从红素中开发了先进的多孔碳材料,以改进相变材料 (PCM). 由此产生的复合材料提供了增强的太阳能储存和转换,解决了高效能源应用的泄漏和导热问题.

科学领域:

材料科学材料科学材料科学
可再生能源可再生能源是可再生能源.
碳材料碳材料

背景情况:

变相材料 (PCM) 存在泄漏,热导率差,光热转换效率低等问题.
来自生物质的多孔碳为提高太阳能应用中的PCM性能提供了解决方案.

研究的目的:

为高性能PCM复合材料合成和表征新的素衍生的多孔碳 (HLPC,MILPC,MELPC).
评估这些复合材料的太阳能收集,转换和储存能力.

主要方法:

通过高温现场激活,使用硫酸盐和各种激活剂 (CaCO3,KOH,ZnCO3) 制备了等级,微孔和中孔的木质素衍生的多孔碳.
(PW) 被封装在多孔的碳支物中,以创建基于碳的PCM复合材料.
性能是根据特定的表面积,孔积,潜热,光热转换效率,光电性能和热稳定性来评估的.

主要成果:

由于其高特异面积 (2,358 m2/g),大孔积 (1.1 cm3/g) 和相互连接的结构,PW/HLPC表现出卓越的性能.
PW/HLPC表现出高潜热 (123.4 kJ/kg),优异的光热转换和存储效率 (95%),以及强大的光电转换 (174.5 mV).
与原始生物炭基复合材料相比,PW/HLPC复合材料在90°C时显示出更好的防漏性能和更好的循环稳定性.

结论:

素衍生的多孔碳,特别是HLPC,显著提高了用于太阳能应用的相变材料的性能.
开发的PW/HLPC复合材料为高价值木质素利用和高效的太阳能采集,转换和储存提供了一个有前途的途径.
这些材料有效地克服了传统PCM的局限性,为实际的太阳能解决方案铺平了道路.

关键词:

在Lignin的基础上.阶段变化材料复合材料的复合材料光热能源的转换和储存光热能源的转换和储存.有孔的碳是多孔的碳.太阳能-电能转换的转换方式

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