Supercapacitors: Aligned Ionogel Electrolytes for High‐Temperature Supercapacitors (Adv. Sci. 5/2019)

Liu, Xinhua; Taiwo, Oluwadamilola O.; Yin, Chengyao; Ouyang, Mengzheng; Chowdhury, Ridwanur; Wang, Baofeng; Wang, Huizhi; Wu, Billy; Brandon, Nigel P.; Wang, Qigang; Cooper, Samuel J.

doi:10.1002/advs.201970029

Cited by 4 publications

(3 citation statements)

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“…At high temperatures, the ionic conductivity was increased through the dissolution and ionization of aligned NaAc crystals, suggesting an increase of specific capacitance (Figure 35c). [195,196] The capacity retention percentage after 10 000 cycles at -20, 20, and 60 °C were 75.3, 86.6, and 92.7%, respectively. The thermal resistance of A 0 D 15 -NaAc 1.2 electrolyte was tested under liquid nitrogen (-196 °C) and flame test (>200 °C).…”

Section: Hydrogelsmentioning

confidence: 97%

Solid Electrolytes for High‐Temperature Stable Batteries and Supercapacitors

Kumaravel

Bartlett

Pillai

2020

Advanced Energy Materials

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Reports of recent fire accidents in the electronics and electric vehicles (EVs) industries show that thermal runaway (TR) reactions are a key consideration for the industry. Utilization of solid electrolytes (SEs) could be an important solution in to the TR issues connected to exothermic electrochemical reactions. Data on the thermal stability of modern SEs, ionic transport mechanisms, kinetics, thermal models, recent advances, challenges, and future prospects are presented in this review. Ceramic polymer nanocomposites are the most appropriate SEs for high‐temperature stable batteries (in the range of 80–200 °C). Hydrogels and ionogels can be employed as stable, flexible, and mechanically durable SEs for antifreeze (up to –50 °C) and high‐temperature (up to 200 °C) applications in supercapacitors. Besides the thermal safety features, SEs can also prolong the lifecycle of energy storage devices in next‐generation EVs, space devices, aviation gadgets, defense tools, and mobile electronics.

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Section: Hydrogelsmentioning

confidence: 97%

Solid Electrolytes for High‐Temperature Stable Batteries and Supercapacitors

Kumaravel

Bartlett

Pillai

2020

Advanced Energy Materials

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“…The preparation of ionogels mainly includes chemical crosslinking [ 20,21 ] and physical crosslinking, [ 22,23 ] which imparts the ionogels with different properties, such as mechanical properties, self‐healing capability, and adhesive capacity. [ 13,24 ] The chemical‐crosslink ionogel usually exhibits satisfactory fracture strength and elasticity, owing to the stretchable covalent bond between crosslinker and the polymers.…”

Section: Introductionmentioning

confidence: 99%

Strong and Ultratough Ionogel Enabled by Ingenious Combined Ionic Liquids Induced Microphase Separation

Tie,

Mao,

Zhang

et al. 2023

Adv Funct Materials

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Ionogels have become a popular material in flexible electronics and soft robotics based on their excellent ionic conductivity, environmental tolerance, and electrochemical stability. However, it remains a challenge to develop an ionogel integrated with high strength, toughness, self‐healing, and adhesion. Herein, a novel strategy is established to design a high‐strength (0.97 MPa) and tensile (980%), excellent crack insensitivity, self‐healing ionogel based on the cosolvent method. By virtue of differential interactions between the specific polymer and various ionic liquids with gradient polarity, cosolvent systems are employed to achieve high‐performance ionogels by a simple one‐step polymerization. Gel permeation chromatography, atomic force microscopy, time‐domain nuclear magnetism, and density functional theoretical calculation are used to analyze the reasons. Microphase separation can be induced by hydrone or stretching to enhance strength of the ionogel. Therefore, ionogels can be assembled as strain and temperature sensors to monitor human movement and person's body temperature with a low detection threshold (0.1 °C) in extreme environments. This concept creates a new path to achieve soft materials with high performance, and provide a prospective strategy to regulate the in situ microphase change and performance of the resulting ionogel via the one‐step polymerization.

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“…[3,4] To date, plentiful gelation approaches have been developed to construct rationally designed gel electrolytes, such as hydrogels, organohydrogels, ionogels, and ionic elastomers via homogeneous solvent-swelling or salt-plasticized soft chain cross-link. [5][6][7][8][9][10][11][12][13] For ionic conduction, however, a formidable challenge remains to overcome the poor modulation of soft chain networks. The randomness of interior porous channels prohibits the free transportation of ions.…”

Section: Introductionmentioning

confidence: 99%

Liquid Crystal Electrolyte with Lamellar Ionic Channels for All‐In‐One Gel Flexible Supercapacitor

Wu,

Chu,

Zhang

et al. 2023

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Liquid crystalline hydrogels with nanoscale order are an attractive soft material to transport ions or electrons with high efficiency. By employing noncovalent interactions between amphiphiles and solvents, defined anisotropic ordered structures can assemble that serve as interior transmissible channels. Herein, the phase behaviors of a polymerizable amphiphile of 1‐vinyl‐3‐alkylimidazolium bromide (VCnIMBr, n = 12, 14, 16) are investigated at different concentrations in a deep eutectic solvent. The aggregation such as micelle, hexagonal, and lamellar liquid crystal phase is created. Through in‐phase polymerization, the lamellar structures within an an isotropic liquid crystal can be well solidified to obtain a conductive gel electrolyte. A sandwich‐structured all‐in‐one gel flexible supercapacitor is then built with this specific gel electrolyte. With greatly increased adhesion and minimized interfacial resistance between electrode and electrolyte, the approach will be able to create energy‐storage devices with anisotropic ionic and electronic charge transportations envisioned for various electrochemical applications.

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Supercapacitors: Aligned Ionogel Electrolytes for High‐Temperature Supercapacitors (Adv. Sci. 5/2019)

Cited by 4 publications

References 0 publications

Solid Electrolytes for High‐Temperature Stable Batteries and Supercapacitors

Solid Electrolytes for High‐Temperature Stable Batteries and Supercapacitors

Strong and Ultratough Ionogel Enabled by Ingenious Combined Ionic Liquids Induced Microphase Separation

Liquid Crystal Electrolyte with Lamellar Ionic Channels for All‐In‐One Gel Flexible Supercapacitor

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