Poly(3,4-ethylenedioxythiophene) Based Solid-State Polymer Supercapacitor with Ionic Liquid Gel Polymer Electrolyte

Du, Haiyan; Wu, Zhi Yuan; Xu, Youlong; Liu, Shaoze; Yang, Huimin

doi:10.3390/polym12020297

Cited by 28 publications

(11 citation statements)

References 57 publications

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“…Porous polymer membranes with IL have demonstrated 85.5 F/g at 120 °C . Finally, H 2 SO 4 -doped polymers show widely varying performances of 33, 87, 160, or 394 F/g at 25 °C, although the last entry was for charging rates of 2 mA/cm 2 . − These systems also do not report high temperature stability.…”

Section: Resultsmentioning

confidence: 99%

Solid-State, Single-Anion-Conducting Networks for Flexible and Stable Supercapacitor Electrolytes

Shen

Kabbani

Evans

2021

ACS Appl. Polym. Mater.

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Supercapacitors are a complementary energy storage technology to batteries and will be important for next-generation applications such as wearable sensors, soft robotics, roll-up displays, and electric vehicles. Here, we report a flexible supercapacitor with an all solid-state, single-ion-conducting polymer network electrolyte. The electrodes are comprised of reduced graphene oxide held together with a neutral polymer network to stabilize the dispersion and lend flexibility to the overall supercapacitor. Due to the high thermal and electrochemical stability of the network polymerized ionic liquid electrolyte, the resulting device can be charged to high voltages (3 V) and operated at high temperatures (120 °C) with excellent cycling stability. A 300 F/g specific capacitance is achieved by charging the device at 0.57 A/g and 90 °C or at 1.8 A/g and 120 °C. Due to the flexible network, the device can bend up to 180° without a substantial change in capacitance. The electrode/electrolyte interface, network architecture, and single-ion-conducting nature of the electrolyte are shown to be critical for high capacitance through a series of control experiments with ionic liquid supercapacitors.

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Section: Resultsmentioning

confidence: 99%

Solid-State, Single-Anion-Conducting Networks for Flexible and Stable Supercapacitor Electrolytes

Shen

Kabbani

Evans

2021

ACS Appl. Polym. Mater.

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“…After 5000 cycles at 120 mAg À 1 , the capacitance retention rate of the SC with 10 wt.% PIL is only is 55 %, while the SC with 35 wt.% PIL exhibits an excellent cycle stability and its capacitance retention in the final 5000 cycles is 87 %, which is a good result compared to the literature data for such systems. [29][30][31][32] This supercapacitor displays not only high stability of the discharge capacitance for more than 7000 cycles but also a high effectiveness of charge-discharge process (Table 2). The reason for the result can be explained by the change in the electrode/ electrolyte interface, which is essential in controlling the storage and delivery of charge.…”

Section: Resultsmentioning

confidence: 99%

Modular Platform for Synthesis of Poly(Ionic Liquid) Electrolytes for Electrochemical Applications in Supercapacitors

et al. 2021

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Pyrrolidinium based poly(ionic liquids) (PIL) are successfully obtained and characterized. Special attention is paid to the detailed characterization of the polymer products to determine their molecular-mass characteristics and to establish the composition-property relationship when selecting polymer electrolytes suitable for electrochemical tests. Characterization is performed using: chromatographic methods-combined gel permeation chromatography (GPC) with triple detection-refractometry, UV and laser light scattering; spectroscopy methods-Fourier transform infrared (FTIR), proton (1H) NMR spectro-scopy; thermogravimetric analysis (TGA) and TGA/gas chromatography (GC)/mass selective detection (MSD). Supercapacitors based on commercial activated carbon, with electrolyte containing PIL dissolved in dimethylformamide (DMF) have been developed and preliminary charge/discharge galvanostatic tests in a two-electrode supercapacitor cell as well as an assessment of electrodes material and its stability in the polymeric ionic electrolyte were conducted. The PIL supercapacitor demonstrates stable capacitance characteristics and is promising for further studies in this direction.

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“…The specific capacitance ( C s , F g –1 ) of the supercapacitors can be calculated according to the GCD curves at different current densities using eq . where I (A) is the charge–discharge current, Δ t (s) is the discharge time, Δ U (V) is the potential window, and m (g) is the effective total weight of AC of the positive and negative electrodes …”

Section: Methodsmentioning

confidence: 99%

Dual-Aspect Expanding Electrochemical Characteristics of Flexible Supercapacitors via an Ionic Liquid and a High-Boiling-Point Solvent

2022

ACS Appl. Energy Mater.

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The operating window and specific capacitance are key parameters for supercapacitors. Broadening the operating window and boosting specific capacitance simultaneously remain a challenge for researchers. In this work, the ionic liquid 1-butyl-3-methylimidazolium iodide (BMIMI) and dimethylsulfoxide (DMSO) are innovatively introduced into a polyvinyl alcohol (PVA) gel at the same time with KI as conductive ions for supercapacitors. It is found that the use of DMSO obviously increased the potential window from 1 V (with the PVA-H2O-KI system) to 2 V (PVA-DMSO-KI); the use of BMIMI substantially increased the specific capacitance from 39.6 F g–1 (PVA-DMSO-KI) to 56.5 F g–1 (PVA-DMSO-KI-BMIMI). With activated carbon as electrodes, an energy density of 31.39 W h kg–1 (4.28 times that of PVA-H2O-KI at 0.5 A g–1) and a power density of 5012.58 W kg–1 (two times that of PVA-H2O-KI at 5 A g–1) are obtained. Using bendable copper foil as current collectors, the supercapacitor can work stably at any bending angle. In addition, the stability within 100 °C shows its excellent portability. It provides a pathway for the development of commercialized high-performance supercapacitors.

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Poly(3,4-ethylenedioxythiophene) Based Solid-State Polymer Supercapacitor with Ionic Liquid Gel Polymer Electrolyte

Cited by 28 publications

References 57 publications

Solid-State, Single-Anion-Conducting Networks for Flexible and Stable Supercapacitor Electrolytes

Solid-State, Single-Anion-Conducting Networks for Flexible and Stable Supercapacitor Electrolytes

Modular Platform for Synthesis of Poly(Ionic Liquid) Electrolytes for Electrochemical Applications in Supercapacitors

Dual-Aspect Expanding Electrochemical Characteristics of Flexible Supercapacitors via an Ionic Liquid and a High-Boiling-Point Solvent

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