A flexible semitransparent dual-electrode hydrogel based triboelectric nanogenerator with tough interfacial bonding and high energy output

Xin Jing, Heng Li, Hao Yang Mi, Pei Yong Feng, Xiaoming Tao, Yuejun Liu, Chuntai Liu, Changyu Shen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

Triboelectric Nanogenerators (TENGs), as a novel tool that is capable of harnessing ubiquitous mechanical energy, have gained tremendous attention in recent years. Developing flexible and transparent TENGs with high triboelectric output performance is a major challenge towards adaptable and invisible energy harvesters. Previously developed transparent TENGs are normally used in a single electrode working mode or have relatively low output. Herein, a flexible semitransparent dual-electrode hydrogel-based TENG (DH-TENG) with high output was developed. The DH-TENG contains a thermoplastic polyurethane (TPU) tribopositive layer and a polydimethylsiloxane (PDMS) tribonegative layer. Both materials are highly transparent. NaCl containing polyacrylamide (PAM) hydrogels were used as electrodes, and polyethylene terephthalate (PET) sheets were used to provide mechanical stiffness. A benzophenone (BP) grafting method was used to enhance the interfacial bonding between hydrophobic triboelectric materials and hydrophilic hydrogels, which realized a significant improvement in tear strength of over 12 times. The DH-TENG demonstrated a high instant voltage and current of 311.5 V and 32.4 µA respectively. A maximum power density of 2.7 W m-2was achieved on a 4.7 MO resistor. Furthermore, the DH-TENG showed a highly stable output under continuous running and demonstrated the capability to charge capacitors and power small electronics such as a timer, pedometer, and digital watch.

Original languageEnglish
Pages (from-to)5752-5760
Number of pages9
JournalJournal of Materials Chemistry C
Volume8
Issue number17
DOIs
Publication statusPublished - 7 May 2020

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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