Reinforced polyaniline/polyvinyl alcohol conducting hydrogel from a freezing–thawing method as self-supported electrode for supercapacitors

Huang, Huabo; Yao, Junlong; Li, Liang; Zhu, Furong; Liu, Zhitian; Zeng, Xiaobo; Yu, Xianghua; Huang, Zhiliang

doi:10.1007/s10853-016-0137-8

Cited by 78 publications

(40 citation statements)

References 41 publications

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“…Ever-increasing demands of modern microelectromechanical systems and high-temperature electronic and energy storage devices have stimulated the research and design on multifunctional polymer composites [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. Although polymers such as polypropylene (PP) exhibit excellent processability, insulativity, and are low-cost [ 8 , 9 , 10 ], the lack of dielectric properties restricts their application in dielectric materials and electronic component fields [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Enhancement of Thermal Conductivity and Dielectric Properties in Al2O3/BaTiO3/PP Composites

Yao

Zhou

et al. 2018

Materials

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Multifunctional polymer composites with both high dielectric constants and high thermal conductivity are urgently needed by high-temperature electronic devices and modern microelectromechanical systems. However, high heat-conduction capability or dielectric properties of polymer composites all depend on high-content loading of different functional thermal-conductive or high-dielectric ceramic fillers (every filler volume fraction ≥ 50%, i.e., ffiller ≥ 50%), and an overload of various fillers (fthermal-conductive filler + fhigh-dielectric filler > 50%) will decrease the processability and mechanical properties of the composite. Herein, series of alumina/barium titanate/polypropylene (Al2O3/BT/PP) composites with high dielectric- and high thermal-conductivity properties are prepared with no more than 50% volume fraction of total ceramic fillers loading, i.e., ffillers ≤ 50%. Results showed the thermal conductivity of the Al2O3/BT/PP composite is up to 0.90 W/m·K with only 10% thermal-conductive Al2O3 filler, which is 4.5 times higher than the corresponding Al2O3/PP composites. Moreover, higher dielectric strength (Eb) is also found at the same loading, which is 1.6 times higher than PP, and the Al2O3/BT/PP composite also exhibited high dielectric constant (εr = 18 at 1000 Hz) and low dielectric loss (tan δ ≤ 0.030). These excellent performances originate from the synergistic mechanism between BaTiO3 macroparticles and Al2O3 nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Synergistic Enhancement of Thermal Conductivity and Dielectric Properties in Al2O3/BaTiO3/PP Composites

Yao

Zhou

et al. 2018

Materials

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“…Self-supported electrodes which did not use binder, conductive agent or even current collector have been widely studied due to its low cost, stable structure and excellent electrochemical performance [30]. There were mainly two methods to prepare self-supported electrodes: (1) combining active electrode material on the surface of self-supported substrate (carbon cloth, nickel grid, sponge) [31]; (2) directly using self-supported materials with electrochemical properties as electrode materials via electro-deposition, CVD, electrospinning and hydrothermal method [32][33][34][35][36]. Huang et al [36] directly used PANI/PVA hydrogel as selfsupported electrode for supercapacitor.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Electrochemical Performance of Hollow Activated Carbon Fiber Self-Supported Electrode for Supercapacitor

Jiao

Cardon

et al. 2020

j nanosci nanotechnol

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Hollow activated carbon fiber (HACF) with high specific surface area and high charge storage capability was prepared by pre-oxidation, carbonization and KOH-activation from polyacrylonitrile (PAN). HACF was used as self-supported working electrode directly without any binder and conductive agent. The effect of the activation time on specific surface area of HACF was studied intensively. The results show that the specific surface area of HACF increased with the increase of activation time from 0.5 h to 1.5 h, and then decreased with further increase of activation time. Highest specific surface area of 1873 m 2 g −1 and micropore volume of 0.61 cm 3 g −1 were obtained in HACF activated for 1.5 h. Electrochemical properties of HACF can be improved with increase of activation time, but excessive activation results in the decrease of specific surface area and increase of internal resistance of HACF. The self-supported electrode of HACF possesses a large specific capacitance of 323 F g −1 at 0.05 A g −1 and 216 F g −1 at 1 A g −1 . Therefore, HACF can be a promising self-supported electrode for high performance supercapacitors.

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“…Great efforts have been made to improve the performance and durability of the materials used as electrodes and electrolyte of such devices. As low‐cost and flexible materials, conducting polymer (particularly polyaniline, PANI) based composite gels have received great attention to be used as the electrode material in supercapacitors . Li et al.…”

Section: Introductionmentioning

confidence: 99%

“…As low-cost and flexible materials, conducting polymer (particularly polyaniline, PANI) based composite gels have received great attention to be used as the electrode material in supercapacitors. [7][8][9][10][11][12][13][14][15][16][17] Li et al have reported the supramolecular assembly of polyvinyl alcohol (PVA) and PANI for fabrication of flexible supercapacitors with 13.6 Whkg À 1 energy density. [9] In another work, graphene oxide was mixed with a composite gel to make supercapacitor electrodes with the specific capacitance of 438.8 Fg À 1 .…”

Section: Introductionmentioning

confidence: 99%

A Polyaniline‐Based Redox‐Active Composite Gel Electrolyte with Photo‐Electric and Electrochromic Properties

et al. 2019

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A polyaniline (PANI)‐based gel material with a redox‐active nature has demonstrated unique charge storage, photovoltaic, and electrochromic properties in the bulk of the gel. The specific capacitance in the volume of the gel was measured to be 428.9 mF g−1. Also, a hybrid device for concurrent solar energy harvesting and charge storage was made simply by placing a layer of the gel between a TiO2 coated electrode and a carbon electrode. The hybrid device showed 137 mV open circuit voltage under the light condition with only 10 mV voltage drop in 600 s after cessation of light. The electrochromic property of the composite gel was also studied in a device made of two transparent electrodes. The results showed 64 % transmittance at 564 nm and zero transmittance when the cell was biased at 0.0 V and 2.0 V, respectively. The photoelectric property and the redox‐active nature of the gel suggest existence of both ionic and electronic conductions through the electrolytes. The results are encouraging to further customize the composite gel for various applications, including supercapacitors, solar cells, photoactive supercapacitors, and electrochromic windows.

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Reinforced polyaniline/polyvinyl alcohol conducting hydrogel from a freezing–thawing method as self-supported electrode for supercapacitors

Cited by 78 publications

References 41 publications

Synergistic Enhancement of Thermal Conductivity and Dielectric Properties in Al2O3/BaTiO3/PP Composites

Synergistic Enhancement of Thermal Conductivity and Dielectric Properties in Al2O3/BaTiO3/PP Composites

Preparation and Electrochemical Performance of Hollow Activated Carbon Fiber Self-Supported Electrode for Supercapacitor

A Polyaniline‐Based Redox‐Active Composite Gel Electrolyte with Photo‐Electric and Electrochromic Properties

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