Multifunctional Superelastic Graphene-Based Thermoelectric Sponges for Wearable and Thermal Management Devices
By:
Zhang, D (Zhang, Ding) [1] , [2] ;
Mao, Y (Mao, Yin) [1] , [2] ;
Bai, PJ (Bai, Peijia) [1] , [2] ;
Li, Q (Li, Qi) [1] , [2] ;
He, W (He, Wen) [1] , [2] ;
Cui, H (Cui, Heng) [1] , [2] ;
Ye, F (Ye, Fei) [1] , [2] ;
Li, CX (Li, Chenxi) [3] , [4] , [5] ;
Ma, RJ (Ma, Rujun) [1] , [2] ;
Chen, YS (Chen, Yongsheng) [3] , [4] , [5]
DOI
10.1021/acs.nanolett.2c00696
Abstract
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.
