Zhang Chunyang, Zhang Quan, Zhang Ding, Wang Mengyan, Bo Yiwen, Fan Xiangqian, Li Fengchao, Liang Jiajie, Huang Yi, Ma Rujun, Chen Yongsheng
School of Materials Science and Engineering, National Institute for Advanced Materials, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, Tongyan Road 38, Tianjin, 300350 P. R. China.
State Key Laboratory and Institute of Elemento-Organic Chemistry, Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, College of Chemistry, Nankai University, Weijin Road 94, Tianjin, 300071 P. R. China.
Nano Lett. 2021 Jan 27;21(2):1047-1055. doi: 10.1021/acs.nanolett.0c04252. Epub 2021 Jan 6.
Thermoelectric (TE) technology provides a new way to directly harvest and convert the heat continuously released from the human body. The greatest challenge for TE materials applied in wearable TE generators is compatible with the constantly changing morphology of the human body while offering a continuous and stable power output. Here, a stretchable carboxylic single-walled carbon nanotube (SWNT)-based TE fiber is prepared by an improved wet-spinning method. The stable Seebeck coefficient of the annealed carboxylic SWNT-based TE fiber is 44 μV/K even under the tensile strain of ∼30%. Experimental results show that the fiber can continue to generate constant TE potential when it is changed to various shapes. The new stretchable TE fiber has a larger Seebeck coefficient and more stretchability than existing TE fibers based on the Seebeck effect, opening a path to using the technology for a variety of practical applications.
热电（TE）技术提供了一种直接收集并转换人体持续释放热量的新方法。应用于可穿戴TE发电机的TE材料面临的最大挑战是，要在与人体不断变化的形态兼容的同时，提供持续稳定的功率输出。在此，通过改进的湿法纺丝方法制备了一种基于可拉伸羧基单壁碳纳米管（SWNT）的TE纤维。即使在约30%的拉伸应变下，退火后的基于羧基SWNT的TE纤维的塞贝克系数仍稳定在44 μV/K。实验结果表明，当纤维改变为各种形状时，它仍能继续产生恒定的TE电势。基于塞贝克效应，这种新型可拉伸TE纤维比现有的TE纤维具有更大的塞贝克系数和更高的拉伸性，为该技术在各种实际应用中开辟了道路。
