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Paraffin/Ti3C2Tx Mxene@Gelatin Aerogels Composite Phase-Change Materials with High Solar-Thermal Conversion Efficiency and Enhanced Thermal Conductivity for Thermal Energy Storage
Energy & Fuels ( IF 5.2 ) Pub Date : 2021-01-25 , DOI: 10.1021/acs.energyfuels.0c04275 Xianjie Liu 1 , Fankai Lin 1 , Xiaoguang Zhang 2 , Mingyong Liu 1 , Zhenhua Sun 1 , Liangpei Zhang 1 , Xin Min 1 , Ruiyu Mi 1 , Zhaohui Huang 1
Energy & Fuels ( IF 5.2 ) Pub Date : 2021-01-25 , DOI: 10.1021/acs.energyfuels.0c04275 Xianjie Liu 1 , Fankai Lin 1 , Xiaoguang Zhang 2 , Mingyong Liu 1 , Zhenhua Sun 1 , Liangpei Zhang 1 , Xin Min 1 , Ruiyu Mi 1 , Zhaohui Huang 1
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The application of phase-change materials (PCMs) for solar energy utilization and thermal energy storage is limited by their low thermal conductivity, undesirable solar-thermal conversion efficiency, and poor shape stability. Here, the novel paraffin/Ti3C2Tx@gelatin (PA/T@G) composite PCMs were successfully obtained by encapsulating paraffin (PA) into gelatin aerogels modified by Ti3C2Tx nanosheets. Three-dimensional (3D) porous gelatin aerogel acted as a favorable supporting material for PA with large enthalpy, while the Ti3C2Tx nanosheets contributed to enhancing the thermal conductivity and converting solar energy into thermal energy by trapping photons and heating molecules. The results exhibited that the composite PCMs had high load rates (96.3–97.7%) and large melting enthalpies (184.7–199.9 J/g). The thermal conductivity of PA/T-30@G was 0.919 W/(m·K), which reached up to 3.48 times that of PA, and the solar-thermal conversion efficiency of the composite PCMs was greatly improved via the introduction of Ti3C2Tx nanosheets. Notably, the composite PCMs with good shape and thermal stability is a promising material for solar-thermal energy storage applications.
中文翻译：
石蜡/ Ti 3 C 2 T x Mxene @明胶气凝胶复合相变材料，具有高的太阳热转换效率和增强的热导率，可用于储热
相变材料（PCM）用于太阳能利用和热能存储的应用受到其低导热率，不期望的太阳热转换效率和不良的形状稳定性的限制。在这里，新型石蜡/ Ti 3 C 2 T x明胶（PA / T @ G）复合PCM通过将石蜡（PA）封装到经Ti 3 C 2 T x纳米片改性的明胶气凝胶中而成功获得。三维（3D）多孔明胶气凝胶可作为高焓PA的理想支撑材料，而Ti 3 C 2 T x纳米片通过捕获光子和加热分子，有助于提高热导率并将太阳能转化为热能。结果表明，复合材料PCM具有较高的负载率（96.3–97.7％）和较大的熔化焓（184.7–199.9 J / g）。PA / T-30 @ G的热导率为0.919 W /（m·K），是PA的3.48倍，并且通过引入Ti大大提高了复合PCM的太阳热转换效率3 C 2 T x纳米片。值得注意的是，具有良好形状和热稳定性的复合PCM是用于太阳能储能应用的有前途的材料。
更新日期：2021-02-04
中文翻译：
石蜡/ Ti 3 C 2 T x Mxene @明胶气凝胶复合相变材料，具有高的太阳热转换效率和增强的热导率，可用于储热
相变材料（PCM）用于太阳能利用和热能存储的应用受到其低导热率，不期望的太阳热转换效率和不良的形状稳定性的限制。在这里，新型石蜡/ Ti 3 C 2 T x明胶（PA / T @ G）复合PCM通过将石蜡（PA）封装到经Ti 3 C 2 T x纳米片改性的明胶气凝胶中而成功获得。三维（3D）多孔明胶气凝胶可作为高焓PA的理想支撑材料，而Ti 3 C 2 T x纳米片通过捕获光子和加热分子，有助于提高热导率并将太阳能转化为热能。结果表明，复合材料PCM具有较高的负载率（96.3–97.7％）和较大的熔化焓（184.7–199.9 J / g）。PA / T-30 @ G的热导率为0.919 W /（m·K），是PA的3.48倍，并且通过引入Ti大大提高了复合PCM的太阳热转换效率3 C 2 T x纳米片。值得注意的是，具有良好形状和热稳定性的复合PCM是用于太阳能储能应用的有前途的材料。
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