材料科学
热电发电机
碳纳米管
纳米技术
热电效应
可穿戴技术
热电材料
数码产品
可穿戴计算机
光电子学
电气工程
计算机科学
嵌入式系统
复合材料
热导率
工程类
物理
热力学
作者
Kyung Tae Park,Young Shik Cho,Inho Jeong,Doojoon Jang,Hyeon Cho,Yuyoung Choi,Taemin Lee,Youngpyo Ko,Jinkyung Choi,Soo Young Hong,Min‐Wook Oh,Seungjun Chung,Chong Rae Park,Heesuk Kim
标识
DOI:10.1002/aenm.202200256
摘要
Abstract Flexible thermoelectrics that enable conformal contact with heat sources of arbitrary shape are indispensable for self‐powered wearable electronics. Scalable integration of flexible thermoelectric (TE) materials into functional devices has improved over the past few years, however, the practical applications of flexible TE materials are still hindered by low performance. Herein, highly aligned carbon‐nanotube yarns (CNTYs) are proposed, combined with selective doping via picoliter scale inkjet printing. Coagulation assisted by van der Waals forces ensures a highly aligned structure of the CNTY, thus achieving the ultrahigh power factors of 4091 and 4739 µW m −1 K −2 for the p ‐ and n ‐type, respectively. The proposed TE materials can be effortlessly up‐scaled into highly integrated modules via inkjet printing. A highly integrated, flexible CNTY‐based TE generator (TEG) with 600 PN pairs generates unparalleled milliwatt‐scale power at Δ T = 25 K, which is a few orders of magnitude higher than those of previously reported flexible material‐based TEGs. This TEG successfully powers a red light‐emitting diode using body heat alone, requiring no external power sources. For the seamless operation of practical applications requiring high power, this work explores the key design parameters for flexible TEGs with high performance and manufacturability and presents new platforms for self‐powered wearable electronics.
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