Towards the “sustainable” operation at -30 °C without the expense of energy for heating on-face electronics: Intelligent heat conservation and waste heat utilization

Energy Reports

Zhiliang Zhang¹  Shuang-Qin Chen²  Xin Wang³  Feng Wang⁴  Zheng-Dong Chen⁵  Xiaoheng Liu⁶  Yizhi Zhuo⁶  Huaping Tan⁷  Jianying He⁸  Tianle Zhou⁸ 

[1] Corresponding author at: School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.;Country Key Laboratory for Soft Chemistry and Functional Materials of Ministry Education, Nanjing University of Science and Technology, Nanjing 210094, China;Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094, China;;Jiangsu Key Laboratory of Advanced Micro &NTNU Nanomechanical Lab, Department of Structural Engineering, Norwegian University of Science and Technology, Trondheim 7491, Norway;Nano Materials and Technology, Nanjing University of Science and Technology, Nanjing 210094, China;;Jiangsu Key Laboratory of Advanced Micro &School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;

关键词: On-skin electronics;    Intelligent energy conservation;    Super-hygroscopic gel;    Cellulose hydrogel;    Skin moisture;    Waste heat utilization;   

DOI  :  

来源: DOAJ

【 摘 要 】

On-face electronics (On-faceE) are urged to sense “anytime, anywhere” for enabling human senses to globally dominate the Internet of Things. However, with the limited lifetime of batteries and the miniaturization of the On-faceE, On-faceE are confronting two challenges: sustainable operation at the temperature (T) < 0 °C and frost/ice accretion security hazard. Of note, the face and On-faceE themselves continuously generate heat and are more reliable than solar-/motion-based heat supplies. However, such self-generated heat often occurs as waste heat, lost into the environment. Here, a film pioneering the intelligent conservation and utilization of this waste self-generated heat for enabling On-faceE to work even at -30 °C for 8 h is developed, through making a versatile cellulose hydrogel and enabling the super-hygroscopic gel to capture moisture at the T < 0 °C. It creates a ΔT up to 60 °C between inside T and ambient T (-30 °C) after sealing On-faceE and, importantly, intelligently stops conserving heat when the working T > 30 °C and demonstrates outstanding heat-conserving stability and sustainability, thus solving the two challenges without the expense of energy for heating and positioning it as an energy-saving “smart” T-regulating candidate. This work could address the energy shortage and heating costs for conquering low-T limitations for globalizing On-faceE.

【 授权许可】

Unknown