Vibration-to-electric energy conversion with porous graphene oxide-nickel electrode

Chen ZHANG, Fei DANG, Youlong CHEN, Yuan YAN, Yilun LIU, Xi CHEN

Research output: Journal PublicationsJournal Article (refereed)peer-review

7 Citations (Scopus)

Abstract

In this work, we present a new approach of converting vibration energy to electric energy using porous graphene oxide-nickel (pGO-Ni) electrode and ionic solution. When actuated by vibration, the ionic solution repeatedly flows across the pGO-Ni electrode which changes the electric double layer at the interface between the pGO-Ni electrode and ionic solution. Therefore, a significant potential difference between the working electrode and the reference electrode immersed into the static ionic solution is observed. The output voltage first increases with the vibration frequency and then gradually approaches to a saturated value of 70.12 mV as the vibration frequency increases to 15 Hz. By connecting a 3 kΩ resistance to the energy conversion system, the discharging behaviors of the energy conversion system are studied, which shows an exponential decay of the output voltage and current. The proposed energy conversion system is analogous to a supercapacitor, whose effective capacitance, internal resistance and energy conversion efficiency are deduced based on the discharging experiments. The work provides a new vibration-to-electric energy conversion mechanism, which may inspire potential applications in flow sensor and harvesting waste mechanical or vibration energy. © 2017 Elsevier B.V.
Original languageEnglish
Pages (from-to)73-77
Number of pages5
JournalJournal of Power Sources
Volume368
DOIs
Publication statusPublished - 2017
Externally publishedYes

Bibliographical note

Y.L. acknowledges the support from the National Natural Science Foundation of China (No. 11572239) and National Key Research and Development Program of China (No. 2016YFB0700300). X.C. acknowledges the support from the National Natural Science Foundation of China (Nos. 11372241 and 11572238), ARPA-E (DE-AR0000396) and AFOSR (FA9550-12-1-0159). Y.C. acknowledges the China Scholarship Council for financial support.

Keywords

  • Electric double layer
  • Graphene oxide
  • Self-powered capacitor
  • Vibration flow
  • Vibration-to-electric energy conversion

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