TY - JOUR

T1 - Optimization of Sulfonated Polycatechol:PEDOT Energy Storage Performance by the Morphology Control

AU - Vereshchagin, Anatoliy A.

AU - Potapenkov, Vasiliy V.

AU - Vlasov, Petr S.

AU - Lukyanov, Daniil A.

AU - Levin, Oleg V.

N1 - Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2022/6/3

Y1 - 2022/6/3

N2 - Anionic catechol-containing polymers represent a promising class of functional dopants for the capacity improvement of conductive polymers. For example, sulfonated poly(vinylcatechol) SPVC with outstanding theoretical capacity was used as a dopant for poly(ethylenedixythiophene) (PEDOT) conductive polymer, increasing its energy storage performance. However, such materials suffer from insufficient utilization of the theoretical capacity of SPVC originating from non-optimal morphology. In the present study, we performed systematic optimization of the composition and morphology of the PEDOT:SPVC material as a function of the deposition parameters to overcome this problem. As a result, a capacity of 95 mAh·g−1 was achieved in a thin film demonstrating considerable electrochemical stability: 75% capacity retention after 100 cycles and 57% after 1000 cycles. Since the capacity was found to suffer from thickness limitation, a nanocomposite of PE-DOT:SPVC and single-walled carbon nanotubes with high PEDOT:SPVC loading was fabricated, yielding the capacitance 178 F·g−1 or 89 F·cm−2. The capacity values exceed non-optimized film twofold for thin film and 1.33 times for nanocomposite with carbon nanotubes. The obtained results demonstrate the importance of fine-tuning of the composition and morphology of the PE-DOT:SPVC materials to ensure optimal interactions between the redox/anionic and conductive components.

AB - Anionic catechol-containing polymers represent a promising class of functional dopants for the capacity improvement of conductive polymers. For example, sulfonated poly(vinylcatechol) SPVC with outstanding theoretical capacity was used as a dopant for poly(ethylenedixythiophene) (PEDOT) conductive polymer, increasing its energy storage performance. However, such materials suffer from insufficient utilization of the theoretical capacity of SPVC originating from non-optimal morphology. In the present study, we performed systematic optimization of the composition and morphology of the PEDOT:SPVC material as a function of the deposition parameters to overcome this problem. As a result, a capacity of 95 mAh·g−1 was achieved in a thin film demonstrating considerable electrochemical stability: 75% capacity retention after 100 cycles and 57% after 1000 cycles. Since the capacity was found to suffer from thickness limitation, a nanocomposite of PE-DOT:SPVC and single-walled carbon nanotubes with high PEDOT:SPVC loading was fabricated, yielding the capacitance 178 F·g−1 or 89 F·cm−2. The capacity values exceed non-optimized film twofold for thin film and 1.33 times for nanocomposite with carbon nanotubes. The obtained results demonstrate the importance of fine-tuning of the composition and morphology of the PE-DOT:SPVC materials to ensure optimal interactions between the redox/anionic and conductive components.

KW - catechol

KW - conductive polymer

KW - PEDOT

KW - polythiophene

KW - quinone

KW - rechargeable batteries

KW - redox polymer

UR - http://www.scopus.com/inward/record.url?scp=85131202566&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/ce625257-81d0-367a-9c6e-644b4333d6e4/

U2 - 10.3390/nano12111917

DO - 10.3390/nano12111917

M3 - Article

AN - SCOPUS:85131202566

VL - 12

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 11

M1 - 1917

ER -