Synthesis and characterization of nanofiber-type hydrophobic organic materials as electrodes for improved performance of PVDF-based piezoelectric nanogenerators

Eui Jin Ko, Sung Jae Jeon, Yong Woon Han, Se Yeong Jeong, Chong-Yun Kang, Tae Hyun Sung, Kee Won Seong, Doo Kyung Moon

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Poly(3,4-ethylenedioxythiophene) (PEDOT) derivatives are synthesized by oxidative polymerization using sodium dodecyl sulfate (SDS) as an anionic surfactant dopant. The resulting polymeric materials featuring nanofiber-type one-dimensional (1D) structures are identified as poly(2‐butyl‐2,3‐dihydrothieno[3,4‐b][1,4]dioxine:dodecyl sulfate (PEDOT-C 4 :DS) and poly(2‐hexyl‐2,3‐dihydrothieno[3,4‐b][1,4]dioxine:dodecyl sulfate (PEDOT-C 6 :DS). The ratio of the DS anion doped into PEDOT-C 4 :DS and PEDOT-C 6 :DS is 0.16 and 0.23, respectively. The contact angle of water on the PEDOT-C 4 :DS and PEDOT-C 6 :DS films is 76.6° and 87.7° respectively, showing hydrophobic properties similar to that with water on PVDF. It facilitated the fully uniform film formation due to excellent surface matching. Peeling force of PEDOT-C 4 :DS and PEDOT-C 6 :DS is stronger than the one of PEDOT:PSS‐CNT composite. GIWAX analysis showed that PEDOT-C 4 :DS formed the highly ordered edge-on structure and PEDOT-C 6 :DS formed the bimodal orientation consisting of edge-on structure mainly and face-on structure slightly. The electrical conductivity (σ PEDOT‐C4:DS =50.0 S cm −1 ) of PEDOT-C 4 :DS is 41.7 times higher than that of PEDOT:PSS (σ PEDOT:PSS =1.2 S cm −1 ). The output signals (maximum voltages/currents) of piezoelectric nanogenerators (PNGs, electrode/PVDF/electrode) using these materials as electrodes are PNG-1 (PEDOT:PSS‐CNT composite) 1.25 V/128.5 nA, PNG-2 (PEDOT-C 4 :DS) 1.54 V/166.0 nA, and PNG-3 (PEDOT-C 6 :DS) 1.49 V/159.0 nA. Of these, PNG-2 & PNG-3 show maximum piezoelectric output power of 63.0 nW and 59.9 nW at 9 MΩ compared to PNG-1 (41.0 nW at 10 MΩ). They are enhanced up to 53.7%. The excellent surface matching between a piezoelectric active material and an electrode material leads to high output power.

Original languageEnglish
Pages (from-to)11-22
Number of pages12
JournalNano Energy
Volume58
DOIs
Publication statusPublished - 2019 Apr 1

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Nanofibers
Electrodes
Peeling
Anionic surfactants
Composite materials
Sodium dodecyl sulfate
Contact angle
Water
Negative ions
Polymerization
Doping (additives)
Derivatives
polyvinylidene fluoride
poly(3,4-ethylene dioxythiophene)
Electric potential
Polymers
Sulfates
Sodium Dodecyl Sulfate

Keywords

  • Hydrophobicity
  • Nanofiber
  • Nanofibrillar network
  • Piezoelectric nanogenerator
  • Poly(3,4-ethylenedioxythiophene) derivative

ASJC Scopus subject areas

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

Cite this

Synthesis and characterization of nanofiber-type hydrophobic organic materials as electrodes for improved performance of PVDF-based piezoelectric nanogenerators. / Ko, Eui Jin; Jeon, Sung Jae; Han, Yong Woon; Jeong, Se Yeong; Kang, Chong-Yun; Sung, Tae Hyun; Seong, Kee Won; Moon, Doo Kyung.

In: Nano Energy, Vol. 58, 01.04.2019, p. 11-22.

Research output: Contribution to journalArticle

Ko, Eui Jin ; Jeon, Sung Jae ; Han, Yong Woon ; Jeong, Se Yeong ; Kang, Chong-Yun ; Sung, Tae Hyun ; Seong, Kee Won ; Moon, Doo Kyung. / Synthesis and characterization of nanofiber-type hydrophobic organic materials as electrodes for improved performance of PVDF-based piezoelectric nanogenerators. In: Nano Energy. 2019 ; Vol. 58. pp. 11-22.
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abstract = "Poly(3,4-ethylenedioxythiophene) (PEDOT) derivatives are synthesized by oxidative polymerization using sodium dodecyl sulfate (SDS) as an anionic surfactant dopant. The resulting polymeric materials featuring nanofiber-type one-dimensional (1D) structures are identified as poly(2‐butyl‐2,3‐dihydrothieno[3,4‐b][1,4]dioxine:dodecyl sulfate (PEDOT-C 4 :DS) and poly(2‐hexyl‐2,3‐dihydrothieno[3,4‐b][1,4]dioxine:dodecyl sulfate (PEDOT-C 6 :DS). The ratio of the DS anion doped into PEDOT-C 4 :DS and PEDOT-C 6 :DS is 0.16 and 0.23, respectively. The contact angle of water on the PEDOT-C 4 :DS and PEDOT-C 6 :DS films is 76.6° and 87.7° respectively, showing hydrophobic properties similar to that with water on PVDF. It facilitated the fully uniform film formation due to excellent surface matching. Peeling force of PEDOT-C 4 :DS and PEDOT-C 6 :DS is stronger than the one of PEDOT:PSS‐CNT composite. GIWAX analysis showed that PEDOT-C 4 :DS formed the highly ordered edge-on structure and PEDOT-C 6 :DS formed the bimodal orientation consisting of edge-on structure mainly and face-on structure slightly. The electrical conductivity (σ PEDOT‐C4:DS =50.0 S cm −1 ) of PEDOT-C 4 :DS is 41.7 times higher than that of PEDOT:PSS (σ PEDOT:PSS =1.2 S cm −1 ). The output signals (maximum voltages/currents) of piezoelectric nanogenerators (PNGs, electrode/PVDF/electrode) using these materials as electrodes are PNG-1 (PEDOT:PSS‐CNT composite) 1.25 V/128.5 nA, PNG-2 (PEDOT-C 4 :DS) 1.54 V/166.0 nA, and PNG-3 (PEDOT-C 6 :DS) 1.49 V/159.0 nA. Of these, PNG-2 & PNG-3 show maximum piezoelectric output power of 63.0 nW and 59.9 nW at 9 MΩ compared to PNG-1 (41.0 nW at 10 MΩ). They are enhanced up to 53.7{\%}. The excellent surface matching between a piezoelectric active material and an electrode material leads to high output power.",
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T1 - Synthesis and characterization of nanofiber-type hydrophobic organic materials as electrodes for improved performance of PVDF-based piezoelectric nanogenerators

AU - Ko, Eui Jin

AU - Jeon, Sung Jae

AU - Han, Yong Woon

AU - Jeong, Se Yeong

AU - Kang, Chong-Yun

AU - Sung, Tae Hyun

AU - Seong, Kee Won

AU - Moon, Doo Kyung

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N2 - Poly(3,4-ethylenedioxythiophene) (PEDOT) derivatives are synthesized by oxidative polymerization using sodium dodecyl sulfate (SDS) as an anionic surfactant dopant. The resulting polymeric materials featuring nanofiber-type one-dimensional (1D) structures are identified as poly(2‐butyl‐2,3‐dihydrothieno[3,4‐b][1,4]dioxine:dodecyl sulfate (PEDOT-C 4 :DS) and poly(2‐hexyl‐2,3‐dihydrothieno[3,4‐b][1,4]dioxine:dodecyl sulfate (PEDOT-C 6 :DS). The ratio of the DS anion doped into PEDOT-C 4 :DS and PEDOT-C 6 :DS is 0.16 and 0.23, respectively. The contact angle of water on the PEDOT-C 4 :DS and PEDOT-C 6 :DS films is 76.6° and 87.7° respectively, showing hydrophobic properties similar to that with water on PVDF. It facilitated the fully uniform film formation due to excellent surface matching. Peeling force of PEDOT-C 4 :DS and PEDOT-C 6 :DS is stronger than the one of PEDOT:PSS‐CNT composite. GIWAX analysis showed that PEDOT-C 4 :DS formed the highly ordered edge-on structure and PEDOT-C 6 :DS formed the bimodal orientation consisting of edge-on structure mainly and face-on structure slightly. The electrical conductivity (σ PEDOT‐C4:DS =50.0 S cm −1 ) of PEDOT-C 4 :DS is 41.7 times higher than that of PEDOT:PSS (σ PEDOT:PSS =1.2 S cm −1 ). The output signals (maximum voltages/currents) of piezoelectric nanogenerators (PNGs, electrode/PVDF/electrode) using these materials as electrodes are PNG-1 (PEDOT:PSS‐CNT composite) 1.25 V/128.5 nA, PNG-2 (PEDOT-C 4 :DS) 1.54 V/166.0 nA, and PNG-3 (PEDOT-C 6 :DS) 1.49 V/159.0 nA. Of these, PNG-2 & PNG-3 show maximum piezoelectric output power of 63.0 nW and 59.9 nW at 9 MΩ compared to PNG-1 (41.0 nW at 10 MΩ). They are enhanced up to 53.7%. The excellent surface matching between a piezoelectric active material and an electrode material leads to high output power.

AB - Poly(3,4-ethylenedioxythiophene) (PEDOT) derivatives are synthesized by oxidative polymerization using sodium dodecyl sulfate (SDS) as an anionic surfactant dopant. The resulting polymeric materials featuring nanofiber-type one-dimensional (1D) structures are identified as poly(2‐butyl‐2,3‐dihydrothieno[3,4‐b][1,4]dioxine:dodecyl sulfate (PEDOT-C 4 :DS) and poly(2‐hexyl‐2,3‐dihydrothieno[3,4‐b][1,4]dioxine:dodecyl sulfate (PEDOT-C 6 :DS). The ratio of the DS anion doped into PEDOT-C 4 :DS and PEDOT-C 6 :DS is 0.16 and 0.23, respectively. The contact angle of water on the PEDOT-C 4 :DS and PEDOT-C 6 :DS films is 76.6° and 87.7° respectively, showing hydrophobic properties similar to that with water on PVDF. It facilitated the fully uniform film formation due to excellent surface matching. Peeling force of PEDOT-C 4 :DS and PEDOT-C 6 :DS is stronger than the one of PEDOT:PSS‐CNT composite. GIWAX analysis showed that PEDOT-C 4 :DS formed the highly ordered edge-on structure and PEDOT-C 6 :DS formed the bimodal orientation consisting of edge-on structure mainly and face-on structure slightly. The electrical conductivity (σ PEDOT‐C4:DS =50.0 S cm −1 ) of PEDOT-C 4 :DS is 41.7 times higher than that of PEDOT:PSS (σ PEDOT:PSS =1.2 S cm −1 ). The output signals (maximum voltages/currents) of piezoelectric nanogenerators (PNGs, electrode/PVDF/electrode) using these materials as electrodes are PNG-1 (PEDOT:PSS‐CNT composite) 1.25 V/128.5 nA, PNG-2 (PEDOT-C 4 :DS) 1.54 V/166.0 nA, and PNG-3 (PEDOT-C 6 :DS) 1.49 V/159.0 nA. Of these, PNG-2 & PNG-3 show maximum piezoelectric output power of 63.0 nW and 59.9 nW at 9 MΩ compared to PNG-1 (41.0 nW at 10 MΩ). They are enhanced up to 53.7%. The excellent surface matching between a piezoelectric active material and an electrode material leads to high output power.

KW - Hydrophobicity

KW - Nanofiber

KW - Nanofibrillar network

KW - Piezoelectric nanogenerator

KW - Poly(3,4-ethylenedioxythiophene) derivative

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