Enhanced performance of SnSe/PEDOT: PSS composite films by MWCNTs for flexible thermoelectric power generator
Enhanced performance of SnSe/PEDOT: PSS composite films by MWCNTs for flexible thermoelectric power generator
复制标题
DOI：
10.1016/j.jallcom.2021.162844
复制
发表时间：
2021-11
影响因子：
6.2
通讯作者：
Dan Liu;Zhuqing Yan;Yaxin Zhao;Zhidong Zhang;Yongqiu Zheng;Binzhen Zhang;Peng-Yuan Shi;C. Xue
中科院分区：
文献类型：
--
作者：
Dan Liu;Zhuqing Yan;Yaxin Zhao;Zhidong Zhang;Yongqiu Zheng;Binzhen Zhang;Peng-Yuan Shi;C. Xue
采用真空抽滤法制备了柔性多壁碳纳米管（MWCNTs）-10wt%硒化锡（SnSe）/聚（3，4-乙撑二氧噻吩）：聚（苯乙烯磺酸）（PEDOT：PSS）/5vol%二甲基亚砜（DMSO）（MSPPD）复合薄膜，并研究了其热电性能。在不同温度下测量了不同MWCNTs含量的复合膜的电导率（σ）和Seebeck系数（S），随着MWCNTs含量的增加，σ有增加的趋势，而S则逐渐减小。多壁碳纳米管具有较高的电导率和载流子迁移率，可同时提高SnSe/PEDOT：PSS薄膜的载流子浓度和迁移率。MSPPD 10复合薄膜在393 K时获得了59.35 μWm− 1 K − 2的最大功率因数PF。MSPPD 10复合膜具有良好的柔韧性，用半径为4 mm的圆棒弯曲1000次后，σ仅下降到初始值的86%。在温度梯度为39 K时，由5个腿MSPPD 10组成的柔性热电（TE）发生器可以产生3.73 mV的开路电压和14.74 nW的最大输出功率。该研究表明，MWCNTs具有很大的潜力，以提高可穿戴设备的柔性SnSe/PEDOT：PSS复合薄膜的热电性能。
Flexible multiwall carbon nanotubes (MWCNTs)− 10 wt% tin selenide (SnSe)/poly (3,4- ethylene dioxythiophene): poly (styrene sulfonate) (PEDOT: PSS)/5 vol% dimethyl sulfoxide (DMSO) (MSPPD) composite films were fabricated by vacuum filtration method, and their thermoelectric properties were investigated. When the electrical conductivity (σ) and Seebeck coefficient (S) of these composite films with different contents of MWCNTs were measured at different temperatures, σ had an increasing tendency with the increase of MWCNTs content while S would decrease gradually. MWCNTs would improve carrier concentration (n) and mobility (μ) of SnSe/PEDOT: PSS film simultaneously because of MWCNTs with high electrical conductivity and carrier mobility. The maximum power factorPFof 59.35 μWm−1K−2had been obtained for MSPPD10 composite film at 393 K. The MSPPD10 composite film exhibited ex-cellent flexibility, σ decreased only to 86% of its initial stage after bending 1000 cycles using a rod with a radius of 4 mm. A flexible thermoelectric (TE) generator consisting of 5 legs MSPPD10 could generate an open-circuit voltage of 3.73 mV and maximum output power of 14.74 nW when the temperature gradient was 39 K. This research shows that MWCNTs have great potential to enhance the thermoelectric performance of flexible SnSe/PEDOT: PSS composite films for wearable devices.