期刊
NANO LETTERS
卷 22, 期 8, 页码 3417-3424出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c00696
关键词
Seebeck effect; Graphene sponge; Wearable; Thermal energy harvesting; Thermal management
类别
资金
- National Key R&D Program of China [2020YFA0711500, 2020YFA0711501]
- National Natural Science Fund of China [51973095, 52011540401]
- China Postdoctoral Science Foundation [2021T140340]
This paper introduces a superelastic graphene-based thermoelectric sponge for wearable electronics and thermal management. The sponge has a high Seebeck coefficient and large compressive strain, and demonstrates good stability. The sponge array TE device can drive medical equipment and reduce CPU temperature.
Power generation through harvesting human thermalenergy provides an ideal strategy for self-powered wearable design.However, existing thermoelectricfibers,films, and blocks have smallpower generation capacity and poorflexibility, which hinders thedevelopment of self-powered wearable electronics. Here, we report amultifunctional superelastic graphene-based thermoelectric (TE) spongefor wearable electronics and thermal management. The sponge has ahigh Seebeck coefficient of 49.2 mu V/K and a large compressive strain of98%. After 10 000 cyclic compressions at 30% strain, the sponge showsexcellent mechanical and TE stability. A wearable sponge array TEdevice was designed to drive medical equipment for monitoring physiological signals by harvesting human thermal energy.Furthermore, a 4x4 array TE device placed on the surface of a normal working Central Processing Unit (CPU) can generate astable voltage and reduce the CPU temperature by 8 K, providing a feasible strategy for simultaneous power generation and thermalmanagement.
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