Facile MWCNTs-SnSe/PEDOT: PSS ternary composite flexible thermoelectric films optimized by cold-pressing
Facile MWCNTs-SnSe/PEDOT: PSS ternary composite flexible thermoelectric films optimized by cold-pressing
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DOI：
10.1016/j.jmrt.2021.10.075
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发表时间：
2021-10
期刊：
影响因子：
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通讯作者：
Dan Liu;Zhuqing Yan;Yaxin Zhao;Zhidong Zhang;Yongqiu Zhen;Binzhen Zhang;Peng-Yuan Shi;C. Xue
中科院分区：
文献类型：
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作者：
Dan Liu;Zhuqing Yan;Yaxin Zhao;Zhidong Zhang;Yongqiu Zhen;Binzhen Zhang;Peng-Yuan Shi;C. Xue
具有高功率因数的柔性复合薄膜是可穿戴能量采集器的候选者，MWCNTs-SnSe/PEDOT:PSS三元复合薄膜是通过真空过滤方法制备的。研究了冷压对复合薄膜形貌、拉曼光谱和热电（TE）性能的影响。对于冷压MSPPD10三元复合薄膜，其电导率和塞贝克系数均随温度升高而增大。结果表明，冷压后的MSPPD10三元复合薄膜的PF提高至166.5μW·m−1K−2，是未经冷压处理的MSPPD10（59.35μW·m−1K−2）复合薄膜的2.8倍。此外，冷压MSPPD10三元复合薄膜的TE性能优于SnSe或MWCNTs与PEDOT:PSS的结合。冷压的MSPPD10三元复合薄膜具有优异的柔韧性，在半径为4毫米的铁棒上弯曲1000次后，电阻仅增加12%。此外，由4腿冷压MSPPD10三元复合薄膜组成的TE发生器在30 K的温度梯度下最大输出功率为13.5 nW，在柔性TE应用中显示出巨大的潜力。
Flexible composite films with high power factors are the candidate for wearable energy harvesters, MWCNTs-SnSe/PEDOT:PSS ternary composite films were fabricated by a vacuum filtration method. The effects of cold-pressing on morphology, Raman spectra, and thermoelectric (TE) properties of the composite films were studied. For cold-pressed MSPPD10 ternary composite film, its conductivity and Seebeck coefficient both increase with increasing temperature. The results show that thePFis enhanced to 166.5 μW m−1K−2for the cold-pressed MSPPD10 ternary composite film, which is 2.8 times the MSPPD10 (59.35 μW m−1K−2) composite film without cold-pressing treatment. Besides, the TE property of cold-pressed MSPPD10 ternary composite film is better than that of SnSe or MWCNTs combined with PEDOT:PSS. The cold-pressed MSPPD10 ternary composite film had excellent flexibility, and the resistance only increases 12% after 1000 bends on an iron rod with a radius of 4 mm. In addition, the TE generator consisting of 4-leg cold-pressed MSPPD10 ternary composite films has a maximum output power of 13.5 nW at a temperature gradient of 30 K, showing great potential for flexible TE applications.