Superelastic Graphene Aerogel/Poly(3,4-Ethylenedioxythiophene)/MnO2 Composite as Compression-Tolerant Electrode for Electrochemical Capacitors

Lv, Peng; Wang, Yaru; Ji, Chenglong; Yuan, Jiajiao

doi:10.3390/ma10121353

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Superelastic Graphene Aerogel/Poly(3,4-Ethylenedioxythiophene)/MnO₂ Composite as Compression-Tolerant Electrode for Electrochemical Capacitors

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College of Electronic and Optical Engineering, Nanjing University of Posts & Telecommunications, Nanjing 210023, China

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Materials 2017, 10(12), 1353; https://doi.org/10.3390/ma10121353

Received: 13 October 2017 / Revised: 9 November 2017 / Accepted: 21 November 2017 / Published: 24 November 2017

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Abstract

Ultra-compressible electrodes with high electrochemical performance, reversible compressibility and extreme durability are in high demand in compression-tolerant energy storage devices. Herein, an ultra-compressible ternary composite was synthesized by successively electrodepositing poly(3,4-ethylenedioxythiophene) (PEDOT) and MnO₂ into the superelastic graphene aerogel (SEGA). In SEGA/PEDOT/MnO₂ ternary composite, SEGA provides the compressible backbone and conductive network; MnO₂ is mainly responsible for pseudo reactions; the middle PEDOT not only reduces the interface resistance between MnO₂ and graphene, but also further reinforces the strength of graphene cellar walls. The synergistic effect of the three components in the ternary composite electrode leads to high electrochemical performances and good compression-tolerant ability. The gravimetric capacitance of the compressible ternary composite electrodes reaches 343 F g⁻¹ and can retain 97% even at 95% compressive strain. And a volumetric capacitance of 147.4 F cm⁻³ is achieved, which is much higher than that of other graphene-based compressible electrodes. This value of volumetric capacitance can be preserved by 80% after 3500 charge/discharge cycles under various compression strains, indicating an extreme durability. View Full-Text

Keywords: graphene; poly(3,4-ethylenedioxythiophene); MnO₂; composite; compression-tolerant; electrode; electrochemical capacitors

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MDPI and ACS Style

Lv, P.; Wang, Y.; Ji, C.; Yuan, J. Superelastic Graphene Aerogel/Poly(3,4-Ethylenedioxythiophene)/MnO₂ Composite as Compression-Tolerant Electrode for Electrochemical Capacitors. Materials 2017, 10, 1353. https://doi.org/10.3390/ma10121353

AMA Style

Lv P, Wang Y, Ji C, Yuan J. Superelastic Graphene Aerogel/Poly(3,4-Ethylenedioxythiophene)/MnO₂ Composite as Compression-Tolerant Electrode for Electrochemical Capacitors. Materials. 2017; 10(12):1353. https://doi.org/10.3390/ma10121353

Chicago/Turabian Style

Lv, Peng, Yaru Wang, Chenglong Ji, and Jiajiao Yuan. 2017. "Superelastic Graphene Aerogel/Poly(3,4-Ethylenedioxythiophene)/MnO₂ Composite as Compression-Tolerant Electrode for Electrochemical Capacitors" Materials 10, no. 12: 1353. https://doi.org/10.3390/ma10121353

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Superelastic Graphene Aerogel/Poly(3,4-Ethylenedioxythiophene)/MnO₂ Composite as Compression-Tolerant Electrode for Electrochemical Capacitors

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