School of Materials Science and Engineering, and National Institute for Advanced Materials, Nankai University, Tongyan Road 38, Tianjin 300350, P. R. China.
Center for Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, P. R. China.
Nano Lett. 2022 Apr 27;22(8):3417-3424. doi: 10.1021/acs.nanolett.2c00696. Epub 2022 Apr 11.
Power generation through harvesting human thermal energy provides an ideal strategy for self-powered wearable design. However, existing thermoelectric fibers, films, and blocks have small power generation capacity and poor flexibility, which hinders the development of self-powered wearable electronics. Here, we report a multifunctional superelastic graphene-based thermoelectric (TE) sponge for wearable electronics and thermal management. The sponge has a high Seebeck coefficient of 49.2 μV/K and a large compressive strain of 98%. After 10 000 cyclic compressions at 30% strain, the sponge shows excellent mechanical and TE stability. A wearable sponge array TE device was designed to drive medical equipment for monitoring physiological signals by harvesting human thermal energy. Furthermore, a 4 × 4 array TE device placed on the surface of a normal working Central Processing Unit (CPU) can generate a stable voltage and reduce the CPU temperature by 8 K, providing a feasible strategy for simultaneous power generation and thermal management.
通过人体热能收集进行发电为自供电可穿戴设计提供了理想策略。然而，现有的热电纤维、薄膜和块体存在发电能力小、柔韧性差的问题，这阻碍了自供电可穿戴电子产品的发展。在这里，我们报道了一种用于可穿戴电子设备和热管理的多功能超弹性基于石墨烯的热电（TE）海绵。该海绵具有 49.2 μV/K 的高塞贝克系数和 98%的大压缩应变。在 30%应变下进行 10000 次循环压缩后，该海绵表现出优异的机械和 TE 稳定性。设计了一种可穿戴海绵阵列 TE 器件，通过收集人体热能来驱动用于监测生理信号的医疗设备。此外，放置在正常工作中央处理器（CPU）表面的 4×4 阵列 TE 器件可以产生稳定的电压，并将 CPU 温度降低 8 K，为同时进行发电和热管理提供了一种可行的策略。
