Realizing the potential of polyethylene oxide as new positive tribo-material: Over 40 W/m2 high power flat surface triboelectric nanogenerators

Peng Ding, Jinkai Chen, Umar Farooq, Pengfei Zhao, Navneet Soin, Liyang Yu, Hao Jin, Xiaozhi Wang, Shurong Dong, Jikui Luo

Research output: Contribution to journalArticle

25 Citations (Scopus)
81 Downloads (Pure)

Abstract

The on-going research into the negative tribo-materials has led to significant improvements in the performance of triboelectric nanogenerators (TENGs), however, very little attention has been paid to the positive tribo-materials. This work reports on the use of poly(ethylene oxide) (PEO) as the positive tribo-material for the fabrication of TENGs and shows that PEO has much higher positive tribo-polarity than the existing choice of polyamide-6 (PA6). A 2 × 2 cm2 TENG comprising of spin-coated flat PEO and polydimethylsiloxane (PDMS) films produces a voltage of up to 970 V, a current density of 85 mAm−2, and a power of ~ 40 W m−2 under a 50 N contact force. Comparatively, the PA6/PDMS TENG only produces 630 V, 30 mAm−2, and a power of ~ 18 W m−2, showing the remarkable property of the PEO as the positive tribo-material. The results are further supported by the contact potential difference between PEO (1.26 V) and PA6 (0.87 V) obtained using Kelvin Probe Force Microscopy. Furthermore, the triboelectric behavior of PEO is explained in the context of the positively charged oxygen functional groups and the lower work function of PEO as compared to PA6. The work thus expands the current portfolio of materials used for triboelectric nanogenerators with great prospects.

Original languageEnglish
Pages (from-to)63-72
Number of pages10
JournalNano Energy
Volume46
Early online date31 Jan 2018
DOIs
Publication statusPublished - 30 Apr 2018

Keywords

  • High surface potential
  • High triboelectric affinity
  • Poly(ethylene oxide)
  • Polyimide (PA6 Nylon)
  • Triboelectric nanogenerator

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