Layer-by-layer assembly-induced triboelectric nanogenerators with high and stable electric outputs in humid environments

Dojin Kim, Seokmin Lee, Yongmin Ko, Cheong Hoon Kwon, Jinhan Cho

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We introduce a layer-by-layer (LbL) assembly-induced triboelectric nanogenerator (TENG) with a high and stable electric output under a wide range of humidity conditions. In this study, highly porous (cationic poly(allylamine hydrochloride) (PAH)/anionic poly(acrylic acid) (PAA))n multilayer films were prepared via a pH-controlled electrostatic LbL assembly with a subsequent acid treatment and were used as a mold for the triboelectric poly(dimethylsiloxane) (PDMS) replica. The electrical output of the TENGs composed of a protuberant PDMS plate and Al electrodes significantly increased based on the evolution of the nano-/micro-structured PDMS bumps. Particularly, the protuberant PDMS film molded from the porous (1.5 mg mL−1 PAH/0.5 mg mL−1 PAA)20 multilayers displayed a high open-circuit voltage output of 242 V and a short-circuit current density of 16.2 μA cm−2 under a compressive force of 90 N in a relative humidity (RH) of 20%. When this hierarchical PDMS surface was additionally modified by fluorine self-assembled monolayer, the voltage output and current density of the resultant TENG at the same experimental conditions were increased up to approximately 288 V and 17 μA cm−2, respectively, exhibiting a remarkably high humidity-resistant electrical performance (16% loss of the initial voltage at 80% RH).

Original languageEnglish
Pages (from-to)228-239
Number of pages12
JournalNano Energy
Volume44
DOIs
Publication statusPublished - 2018 Feb 1

Fingerprint

Polydimethylsiloxane
carbopol 940
Atmospheric humidity
Acrylics
Acids
Current density
Fluorine
Multilayer films
Electric potential
Self assembled monolayers
Open circuit voltage
Polycyclic aromatic hydrocarbons
Short circuit currents
Electrostatics
Multilayers
baysilon
Electrodes
polyallylamine

Keywords

  • Fluorination, Humidity
  • Layer-by-Layer assembly
  • Nano-/micro-structure
  • Triboelectric nanogenerator

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

Cite this

Layer-by-layer assembly-induced triboelectric nanogenerators with high and stable electric outputs in humid environments. / Kim, Dojin; Lee, Seokmin; Ko, Yongmin; Kwon, Cheong Hoon; Cho, Jinhan.

In: Nano Energy, Vol. 44, 01.02.2018, p. 228-239.

Research output: Contribution to journalArticle

Kim, Dojin ; Lee, Seokmin ; Ko, Yongmin ; Kwon, Cheong Hoon ; Cho, Jinhan. / Layer-by-layer assembly-induced triboelectric nanogenerators with high and stable electric outputs in humid environments. In: Nano Energy. 2018 ; Vol. 44. pp. 228-239.
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