High performance, flexible, poly(3,4-ethylenedioxythiophene) supercapacitors achieved by doping redox mediators in organogel electrolytes

Zhang, Huanhuan; Li, Jinyu; Gu, Cheng; Yao, Mingming; Yang, Bing; Lü, Ping; Ma, Yuguang

doi:10.1016/j.jpowsour.2016.09.137

Cited by 38 publications

(27 citation statements)

References 42 publications

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“…Below that the imaginary part of complex impedance (Z′′) increases abruptly with respect to real part impedance (Z′). This clearly tells the ideal capacitive behavior of the device below 279 Hz (knee frequency) . The phase shift and total impedance of the cell with respect to frequency are presented in Figure F.…”

Section: Resultsmentioning

confidence: 70%

Electrochemical Material Processing via Continuous Charge‐Discharge Cycling: Enhanced Performance upon Cycling for Porous LaMnO₃ Perovskite Supercapacitor Electrodes

2018

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Creating controlled porous morphologies in smart materials offers a significant enhancement in their properties, which can not only open access to various applications, but also improve their efficiency and performance. Among smart materials, porous carbon electrodes have been receiving much attention owing to their smooth and faster ionic kinetics in regard to their electrode‐electrolyte interface, which is promising for the development of high performance devices with a prolonged lifetime. Various techniques including soft and hard templating approaches are available for controlling the pore structure and morphological control of these porous carbon nanostructures, used as negative electrodes. However, reports on stable porous positive electrodes are quite limited. Here, we report on porous LaMnO3 electrodes and their application in symmetric supercapacitors exhibiting high energy and power densities over prolonged lifetime (>110,000 cycles). We demonstrate that a simple electrochemical cycling process can be used as an efficient tool to create proper channels by interconnecting the adjacent pores of the porous electrode material to facilitate smooth and faster ionic transport or intercalation/deintercalation of electrolyte species into the electrode surface. The creation of channels and preconditioning of the electrode surface are well investigated by analysing the voltammogram at various cycles and supports the enhancement of the supercapacitance even after myriad cycles.

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Section: Resultsmentioning

confidence: 70%

Electrochemical Material Processing via Continuous Charge‐Discharge Cycling: Enhanced Performance upon Cycling for Porous LaMnO₃ Perovskite Supercapacitor Electrodes

2018

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“…The redox system is a typical form of pseudocapacitance, where the mechanism involves the adsorption of electroactive ions onto the surface or near‐surface region of electrode materials and faradaic reactions occur with charge transfer. Typical examples include transition metal oxides (e.g., RuO 2 and MnO 2 ) and conducting polymers generated using electrochemical methods (e.g., polyaniline (PANI), polypyrrole, and poly(3,4‐ethylenedioxythiophene)). Transition metal oxides exhibit pseudocapacitance on the bias of fast redox reactions caused by the intercalation of protons (H + ) or alkali metal cations (C + = Na + , K + , etc.…”

Section: Principle Of Energy Storage In Ecsmentioning

confidence: 99%

Advanced Energy Storage Devices: Basic Principles, Analytical Methods, and Rational Materials Design

et al. 2017

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Tremendous efforts have been dedicated into the development of high‐performance energy storage devices with nanoscale design and hybrid approaches. The boundary between the electrochemical capacitors and batteries becomes less distinctive. The same material may display capacitive or battery‐like behavior depending on the electrode design and the charge storage guest ions. Therefore, the underlying mechanisms and the electrochemical processes occurring upon charge storage may be confusing for researchers who are new to the field as well as some of the chemists and material scientists already in the field. This review provides fundamentals of the similarities and differences between electrochemical capacitors and batteries from kinetic and material point of view. Basic techniques and analysis methods to distinguish the capacitive and battery‐like behavior are discussed. Furthermore, guidelines for material selection, the state‐of‐the‐art materials, and the electrode design rules to advanced electrode are proposed.

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“…It still achieves 291.43 F/g even at 10 A/g, exhibiting a good high-rate discharge ability. Comparing specific capacitance of super-capacitors with reported values in Figure 7 c, the PEDOT:PSS/MWCNTs electrode achieved a specific capacity of 1314.24 F/g (1 A/g) in 1 M H 2 SO 4 -0.1 M KI, which is better than that of some similar electrodes based on conducting polymers and or carbon materials, including PEDOT-PSS/SWCNT (single-walled carbon nanotubes) [ 40 ], PEDOT:PSS/MWCNTs [ 21 ], active carbon/PEDOT:PSS [ 38 ], PEDOT:PSS/MWNT/MnO 2 [ 41 ], PEDOT:MWCNT:PTS [ 42 ], PEDOT/HT-CFC (hydrothermal carbon fibre cloth) [ 43 ], PEDOT/Fc (ferrocene) [ 44 ], PEDOT:PSS/MWCNT [ 25 ]. Figure 7 d showed Nyquist plot of PEDOT:PSS/MWCNTs electrodes in 1 M H 2 SO 4 -1 M KI.…”

Section: Resultsmentioning

confidence: 99%

High Performance of Supercapacitor from PEDOT:PSS Electrode and Redox Iodide Ion Electrolyte

Gao

Cai

et al. 2018

Nanomaterials

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Insufficient energy density and poor cyclic stability is still challenge for conductive polymer-based supercapacitor. Herein, high performance electrochemical system has been assembled by combining poly (3,4-ethylenedioxythiophene) (PEDOT):poly (styrene sulfonate) (PSS) redox electrode and potassium iodide redox electrolyte, which provide the maximum specific capacity of 51.3 mAh/g and the retention of specific capacity of 87.6% after 3000 cycles due to the synergic effect through a simultaneous redox reaction both in electrode and electrolyte, as well as the catalytic activity for reduction of triiodide of the PEDOT:PSS.

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High performance, flexible, poly(3,4-ethylenedioxythiophene) supercapacitors achieved by doping redox mediators in organogel electrolytes

Cited by 38 publications

References 42 publications

Electrochemical Material Processing via Continuous Charge‐Discharge Cycling: Enhanced Performance upon Cycling for Porous LaMnO₃ Perovskite Supercapacitor Electrodes

Electrochemical Material Processing via Continuous Charge‐Discharge Cycling: Enhanced Performance upon Cycling for Porous LaMnO₃ Perovskite Supercapacitor Electrodes

Advanced Energy Storage Devices: Basic Principles, Analytical Methods, and Rational Materials Design

High Performance of Supercapacitor from PEDOT:PSS Electrode and Redox Iodide Ion Electrolyte

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High performance, flexible, poly(3,4-ethylenedioxythiophene) supercapacitors achieved by doping redox mediators in organogel electrolytes

Cited by 38 publications

References 42 publications

Electrochemical Material Processing via Continuous Charge‐Discharge Cycling: Enhanced Performance upon Cycling for Porous LaMnO3 Perovskite Supercapacitor Electrodes

Electrochemical Material Processing via Continuous Charge‐Discharge Cycling: Enhanced Performance upon Cycling for Porous LaMnO3 Perovskite Supercapacitor Electrodes

Advanced Energy Storage Devices: Basic Principles, Analytical Methods, and Rational Materials Design

High Performance of Supercapacitor from PEDOT:PSS Electrode and Redox Iodide Ion Electrolyte

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Product

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Electrochemical Material Processing via Continuous Charge‐Discharge Cycling: Enhanced Performance upon Cycling for Porous LaMnO₃ Perovskite Supercapacitor Electrodes

Electrochemical Material Processing via Continuous Charge‐Discharge Cycling: Enhanced Performance upon Cycling for Porous LaMnO₃ Perovskite Supercapacitor Electrodes