MXene aerogel-based phase change materials toward solar energy conversion

被引：217

作者：

Lin, Pengcheng ^{[1
]}

Xie, Jiajin ^{[1
]}

He, Yingdong ^{[1
]}

Lu, Xiang ^{[2
]}

Li, Weijie ^{[1
]}

Fang, Jun ^{[1
]}

Yan, Shouhuan ^{[1
]}

Zhang, Li ^{[1
]}

Sheng, Xinxin ^{[1
]}

Chen, Ying ^{[1
]}

机构：

[1] Guangdong Univ Technol, Sch Mat & Energy, Guangdong Prov Key Lab Funct Soft Condensed Matte, Guangzhou 510006, Peoples R China

[2] South China Univ Technol, Natl Engn Res Ctr Novel Equipmentfor Polymer Proc, Key Lab Polymer Proc Engn, Minist Educ, Guangzhou 510641, Peoples R China

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2020年 / 206卷

基金：

中国国家自然科学基金;

关键词：

MXene nanosheet; Phase change material; Aerogel; Solar energy; HIGH-THERMAL-CONDUCTIVITY; POROUS CARBON; COMPOSITE; NANOCOMPOSITES; PERFORMANCES; NANOSHEETS; STABILITY; CELLULOSE;

D O I：

10.1016/j.solmat.2019.110229

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Two-dimensional transition-metal carbides/carbonitrides (MXenes) have demonstrated wide application prospect in energy conversion and storage, mostly in the form of electrochemical energy storage. Compared with the conversion between chemical energy and electrical energy, an energy conversion process initiated by solar energy and driven by the physical change of energy materials will be a sustainable and environmentally friendly strategy. Therefore, a high-performance MXene aerogel-based phase change material for solar energy conversion and thermal energy storage is constructed. MXene nanosheets with an extinction coefficient of 25.67 L/(g.cm) at 808 nm demonstrate excellent light absorption performance, which can spontaneously convert the solar energy into thermal energy. The polyethylene glycol (PEG) possessing high affinity with MXene acts the medium for thermal energy storage and release in the process of fusion and solidification. The MXene@PEG aerogels are lightweight, with a density about 30 mg/cm3. The MXene skeleton is introduced as supporting materials to keep the shape of MXene@PEG aerogel stable during the phase change process. The MXene nanosheets improve the thermal stability of PEG, the thermal decomposition temperatures can be increased by 40 degrees C. The actual fusion and solidification enthalpies of MXene@PEG aerogels can reach 167.72 and 141.51 J/g, respectively. The photothermal storage efficiency of MXene@PEG aerogels reaches a relatively high value of 92.5%. This work provides a new type of scaffold for lightweight and shape-stable photothermal carrier and paves the way for the application of non-graphene 2D materials toward solar energy utilization.

引用

页数：10

共 43 条

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