Facile green strategy for improving thermoelectric performance of carbon nanotube/polyaniline composites by ethanol treatment
Facile green strategy for improving thermoelectric performance of carbon nanotube/polyaniline composites by ethanol treatment
复制标题
通过乙醇处理提高碳纳米管/聚苯胺复合材料热电性能的简便绿色策略
DOI：
10.1016/j.compscitech.2020.108023
复制
发表时间：
2020
影响因子：
9.1
通讯作者：
He Chaobin
中科院分区：
文献类型：
--
作者：
Li Pengcheng;Zhao Yuhui;Li Hui;Liu Siqi;Liang Yuan;Cheng Xiaolong;He Chaobin
针对目前普遍采用的对人体和环境有害的化学试剂，提出了一种环境友好的去掺杂方法，通过乙醇处理来调节单壁碳纳米管（SWCNT）/聚苯胺（PANI）复合材料的载流子输运和热电性能。与未处理的复合膜相比，处理后PANI部分脱掺杂，导致Seebeck系数明显增加，电导率下降。由于互连的导电CNT网络提供额外的路径以促进载流子传输，因此电导率仅略微降低。因此，实现了362 μW m− 1 K − 2的增强功率因数，这比234 μW m− 1 K −2的原始复合功率因数上级。此外，基于经处理的复合材料的柔性热电器件在ΔT= 50 K时产生2.86 μW的高输出功率和745 μW cm-2的高功率密度。该方法具有成本低、工艺简单、环境友好等优点，在商业热电转换中具有潜在的应用前景。
In contrast to commonly adopted harmful reagents which are not favorable for human body and environment, a facile environmental friendly dedoping approach is proposed to modulate carrier transport and thermoelectric properties of single-walled carbon nanotube (SWCNT)/polyaniline (PANI) composites by ethanol treatment. Compared with the pristine composite films, PANI is partially dedoped after treatments, which results in typically increasing of Seebeck coefficient and deteriorative electrical conductivity. As the interconnected conductive CNT networks provide extra pathways to facilitate carrier transport, the electrical conductivity is only slightly decreased. Consequently, an enhanced power factor of 362 μW m−1K−2is achieved, which is superior to the pristine composite of 234 μW m−1K−2. Furthermore, the flexible thermoelectric device based on the treated composites generates high output power of 2.86 μW and high power density of 745 μW cm−2atΔT= 50 K. With the advantages of low cost, facile processing, and environmental friendly, this strategy exhibits potential application for commercial thermoelectric conversion.