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Fabrication and characterization of polyoxometalate/2D graphene-based flexible supercapacitors for wearable electronic pulse-beat application

  • Yongwu Shi
  • Xinxing WangEmail author
  • Jiaolian Luo
  • Quan XieEmail author
Article
  • 11 Downloads

Abstract

Nowadays, low-dimensional graphene nanomaterials, such as two dimensional (2D) graphene nanosheets (2D GNs), have been widely reported and suggested for, e.g., catalysts, solar cells, and photovoltaic devices, but previous works still do not pay much attention to the flexible electronics sensor that base on the 2D graphene nanomaterials. Here we report on using a highly conductive polyoxometalate (POM) and 2D GNs foam to fabricate the 2D GNs-based supercapacitors capable of detecting the pulse beat rate. Characterization techniques, such as the X-ray diffraction, energy dispersive X-ray spectra, transmission electron microscopy, galvanostatic charge–discharge and cyclic voltammetry, are used to illustrate the structural and electrochemical properties. Our results reveal that the POM can disperse into 2D GNs to form the POM/2D GNs nanocomposites. In the meanwhile, we find the specific cycling stability of POM/2D GNs can be significantly enhanced as compared to bulk 2D GNs foam. Moreover, we design a flexible pulse sensor device, which is based on depositing the POM/2D GNs foam on a conductive adhesive substrate. Our results reveal that the POM/2D GNs-based sensor is sensitive to the external pulse beat, which can linearly detect a bending area within the range of 0.483 mm2. This work indicates that the POM/2D GNs can act as a type of sensor material to monitor the human body health.

Notes

Acknowledgements

The work is supported by the National Natural Science Foundation of China (Grant No. 61264004), the Special Fund for the Twelfth Five-Year Major Sci-Tech Program of Education Department in Guizhou Province of China (Grant No. [2012] 003) and High-level Creative Talent Training Program in Guizhou Province of China.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of MedicineGuizhou UniversityGuiyangPeople’s Republic of China
  2. 2.Department of EquipmentGuiZhou Provincial People’s HospitalGuiyangPeople’s Republic of China
  3. 3.School of Computer Science and EngineeringNanyang Technological University (NTU)SingaporeSingapore
  4. 4.Special and Key Laboratory of Guizhou Provincial Higher Education for Green Energy-Saving MaterialsGuiyangPeople’s Republic of China
  5. 5.Institute of New Type Optoelectronic Materials and Technology, College of Big Data and Information EngineeringGuizhou UniversityGuiyangPeople’s Republic of China

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