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Moisture-induced autonomous surface potential oscillations for energy harvesting.
Long, Yu; He, Peisheng; Shao, Zhichun; Li, Zhaoyang; Kim, Han; Yao, Archie Mingze; Peng, Yande; Xu, Renxiao; Ahn, Christine Heera; Lee, Seung-Wuk; Zhong, Junwen; Lin, Liwei.
Afiliação
  • Long Y; Department of Mechanical Engineering, University of California Berkeley, Berkeley, CA, USA.
  • He P; Department of Mechanical Engineering, University of California Berkeley, Berkeley, CA, USA.
  • Shao Z; Department of Mechanical Engineering, University of California Berkeley, Berkeley, CA, USA.
  • Li Z; Department of Electromechanical Engineering and Centre for Artificial Intelligence and Robotics, University of Macau, Macau, SAR, China.
  • Kim H; Department of Bioengineering, University of California Berkeley, Berkeley, CA, USA.
  • Yao AM; Department of Engineering Mechanics, Tsinghua University, Beijing, China.
  • Peng Y; Department of Mechanical Engineering, University of California Berkeley, Berkeley, CA, USA.
  • Xu R; Department of Mechanical Engineering, University of California Berkeley, Berkeley, CA, USA.
  • Ahn CH; Department of Mechanical Engineering, University of California Berkeley, Berkeley, CA, USA.
  • Lee SW; Department of Bioengineering, University of California Berkeley, Berkeley, CA, USA.
  • Zhong J; Department of Mechanical Engineering, University of California Berkeley, Berkeley, CA, USA. junwenzhong@um.edu.mo.
  • Lin L; Department of Electromechanical Engineering and Centre for Artificial Intelligence and Robotics, University of Macau, Macau, SAR, China. junwenzhong@um.edu.mo.
Nat Commun ; 12(1): 5287, 2021 09 06.
Article em En | MEDLINE | ID: mdl-34489424
ABSTRACT
A variety of autonomous oscillations in nature such as heartbeats and some biochemical reactions have been widely studied and utilized for applications in the fields of bioscience and engineering. Here, we report a unique phenomenon of moisture-induced electrical potential oscillations on polymers, poly([2-(methacryloyloxy)ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide-co-acrylic acid), during the diffusion of water molecules. Chemical reactions are modeled by kinetic simulations while system dynamic equations and the stability matrix are analyzed to show the chaotic nature of the system which oscillates with hidden attractors to induce the autonomous surface potential oscillation. Using moisture in the ambient environment as the activation source, this self-excited chemoelectrical reaction could have broad influences and usages in surface-reaction based devices and systems. As a proof-of-concept demonstration, an energy harvester is constructed and achieved the continuous energy production for more than 15,000 seconds with an energy density of 16.8 mJ/cm2. A 2-Volts output voltage has been produced to power a liquid crystal display toward practical applications with five energy harvesters connected in series.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article