A novel bilayer heterogeneous poly(ionic liquid) electrolyte for high-performance flexible supercapacitors with ultraslow self-discharge

Dong, Keyi; Liu, Yanan; Chen, Zilin; Tian, Lu; Tang, Weiyang; Cao, Shaokui; Chen, Tao

doi:10.1039/d3mh00198a

Cited by 9 publications

(1 citation statement)

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“…In addition to their excellent applications in lithium-ion devices, polyionic liquids, which combine many advantages such as excellent thermodynamic properties and a wide potential window with low vapor pressure, are also a promising polymer gel electrolyte for high-performance flexible supercapacitors. A new bilayered nonhomogeneous polyionic liquid electrolyte (BHPE) has been designed by Dong et al 226 As shown in Fig. 50a, the BHPE consists of a layer of polyanionic complex of poly[1-ethyl-3-methylimidazolium(3-sulfopropyl)methacrylate] (PES) and a layer of polycationic complex of poly[2-(methacryloyloxy)ethyl]trimethylammonium bis(trifluoromethylsulfonyl)imide (PMT) synthesized by free radical polymerization.…”

Section: Applicationmentioning

confidence: 99%

Poly(ionic liquid)s: an emerging platform for green chemistry

Zhu,

Yang

2024

Green Chem.

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Section: Applicationmentioning

confidence: 99%

Poly(ionic liquid)s: an emerging platform for green chemistry

Zhu,

Yang

2024

Green Chem.

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Surface ‒OH Termination‐Reduced Ti₃C₂T_x Pseudo‐capacitors with Reinforced Ionic Liquid Accessibility to Achieve High Energy Density

Shi,

Ma,

Sun

et al. 2024

Adv Funct Materials

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Highly conductive Ti3C2Tx pseudo‐capacitors hold promise to expand energy density by utilizing ionic liquid (IL) electrolytes (e.g., 1‐ethyl‐3‐methylimidazolium bis trifluoromethane sulfonyl imide, EMITFSI) that possesses broaden voltage window, resulting in various applications involving hybrid vehicle, rail transportation, and power system. However, abundantly random surface ‒OH terminations cannot maintain an extremely stabilized Ti3C2Tx layer spacing framework for efficient ion arrangements, increase ionic diffusion barriers, and decline in energy density. Herein, intensely chemical covalent bonding interactions of ‒SH, ‒COOH, and ‒NH2 terminated L‐cysteine molecules with ‒OH terminations are proposed to stabilize Ti3C2Tx and expand interlayer structure, allowing sufficient ionic transport and realizing high energy‐density Ti3C2Tx pseudo‐capacitors. It is found that, with cysteine molecules stayed flat to Ti3C2Tx layer, superior hydrophilic surface, and increased interlayer spacing to 1.51 nm, 2.16‐folds higher than Ti3C2Tx electrode, the Ti3C2Tx‒cysteine electrode delivered high capacitance of 279 F g−1 in EMITFSI/acetonitrile electrolyte. Assembled asymmetric Ti3C2Tx‒cysteine//activated carbon flexible device exhibited a high voltage of 2.9 V and a high energy density of 72.1 Wh kg−1 at a power density of 874 W kg−1, which could power various colored smart rollable flexible electronics at bent angle of 90°. Additionally, identical mechanisms are found in Ti3C2Tx‐amino acid systems, wherein amino acid stayed flat between Ti3C2Tx layers with optimized content, interlayer spacing, and capacitance, no matter amino acid in different charged feature and different sidechain lengths (e.g., glutamine, cysteine, and lysine). The present study provides systematically experimental evidence for improving ion accessibility in IL electrolytes based on an organic‐modified Ti3C2Tx electrode structure.

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Faradaic and Non‐Faradaic Self‐Discharge Mechanisms in Carbon‐Based Electrochemical Capacitors

Zhang,

Wei

2024

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Electrochemical capacitors (ECs) play a crucial role in electrical energy storage, offering great potential for efficient energy storage and power management. However, they face challenges such as moderate energy densities and rapid self‐discharge. Addressing self‐discharge necessitates a fundamental understanding of the underlying processes. This review sets itself apart from other reviews by focusing on the basic principles of self‐discharge processes in carbon‐based ECs, particularly examining the nature of the process and the involvement of redox reactions. This study delineates the potential conditions for various self‐discharge processes and proposes plausible criteria for differentiation, complemented by mathematical modeling. Additionally, the model selection, curve fitting, and effective tuning methods are explored to control self‐discharge processes.

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A novel bilayer heterogeneous poly(ionic liquid) electrolyte for high-performance flexible supercapacitors with ultraslow self-discharge

Abstract: Flexible supercapacitors with high power density and long cyclic stability represent a promising candidate to be used as power supplies for portable electronics, but often suffer from the limited working...

Cited by 9 publications

References 61 publications

Poly(ionic liquid)s: an emerging platform for green chemistry

Poly(ionic liquid)s: an emerging platform for green chemistry

Surface ‒OH Termination‐Reduced Ti₃C₂T_x Pseudo‐capacitors with Reinforced Ionic Liquid Accessibility to Achieve High Energy Density

Faradaic and Non‐Faradaic Self‐Discharge Mechanisms in Carbon‐Based Electrochemical Capacitors

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A novel bilayer heterogeneous poly(ionic liquid) electrolyte for high-performance flexible supercapacitors with ultraslow self-discharge

Abstract: Flexible supercapacitors with high power density and long cyclic stability represent a promising candidate to be used as power supplies for portable electronics, but often suffer from the limited working...

Cited by 9 publications

References 61 publications

Poly(ionic liquid)s: an emerging platform for green chemistry

Poly(ionic liquid)s: an emerging platform for green chemistry

Surface ‒OH Termination‐Reduced Ti3C2Tx Pseudo‐capacitors with Reinforced Ionic Liquid Accessibility to Achieve High Energy Density

Faradaic and Non‐Faradaic Self‐Discharge Mechanisms in Carbon‐Based Electrochemical Capacitors

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Product

Resources

About

Surface ‒OH Termination‐Reduced Ti₃C₂T_x Pseudo‐capacitors with Reinforced Ionic Liquid Accessibility to Achieve High Energy Density