Stretchable supercapacitor at −30 °C

Jin, Xiaojuan; Song, Li; Yang, Hongsheng; Dai, Chunlong; Xiao, Yukun; Zhang, Xinqun; Han, Yuanfei; Bai, Chao; Lü, Bing; Liu, Qianwen; Yang, Zhao; Zhang, Jiatao; Zhang, Zhipan; Qu, Liangti

doi:10.1039/d0ee04066e

Cited by 150 publications

(102 citation statements)

References 76 publications

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“…First, conventional aqueous electrolytes significantly limited the electrochemical window of MSCs to 0-1 V. [29] As shown in Figure 7a,b, once the working voltage exceeded 1.3 V, the decomposition of water molecules in representative aqueous electrolytes of H 2 SO 4 (acidic), KOH (alkaline), or LiCl (salt) abruptly aggravated. Similarly, limited by the fact that water molecules are easily decomposed under high voltage, all reported anti-freezing gel electrolytes based on ethylene glycol or other organic solvents such as dimethyl sulfoxide also show a low working voltage of about 1 V. [13,[87][88][89][90] In contrast, the HVTT-PAM-10.5 polyelectrolyte maintained a stable non-faradaic capacitive current at a much higher voltage of up to 2.3 V (Figure 7b), which can be attributed to the efficient coordination of free water molecules by lithium ion. In order to rationalize the high-voltage mechanism, density-functional-theory-based molecular dynamics (DFT-MD) calculations were applied to the HVTT-PAM-21 and HVTT-PAM-10.5 electrolytes to simulate the status of water, EG and LiTFSI molecules therein.…”

Section: Working Mechanism Of the High-performance Hvtt-msc Under The Wide Temperature Range From −40 To 100 °Cmentioning

confidence: 99%

An Aqueous Anti‐Freezing and Heat‐Tolerant Symmetric Microsupercapacitor with 2.3 V Output Voltage

Jin

Song

Dai

et al. 2021

Advanced Energy Materials

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Symmetric aqueous microsupercapacitors (MSCs) generally show a low working voltage (≤1 V) and narrow operating temperature window in the vicinity of 25 °C due to the poor temperature tolerance and instability of conventional aqueous electrolytes under high voltage. It is challenging to develop MSCs that can offer a high‐voltage output (>2 V) under complex ambient temperature. In this work, a symmetric MSC is fabricated by using the anti‐freezing and heat‐tolerant aqueous polyacrylamide polyelectrolyte (HVTT‐PAM‐10.5) and carbon nanotube microelectrodes, which achieves a record high output voltage of 2.3 V and the widest operating temperature window of −40 to 100 °C among the aqueous MSCs reported previously. It can deliver an ultrahigh areal energy density of above 4.9 μWh cm−2 at temperatures from −40 to 100 °C, outperforming the previous carbon‐based MSCs with aqueous electrolytes at room temperature. Additionally, even after 324 000 cycles at −40 °C and 10 000 cycles at 100 °C, the MSC still retains the high capacitance retention of 92.6% and 90.4%, respectively. Impressively, the HVTT‐PAM‐10.5 polyelectrolyte can also be paired with other electrode materials such as CNT/polyaniline to obtain the highest energy density of 48.6 μWh cm−2 among all symmetric/asymmetric MSCs with aqueous electrolytes.

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Section: Working Mechanism Of the High-performance Hvtt-msc Under The Wide Temperature Range From −40 To 100 °Cmentioning

confidence: 99%

An Aqueous Anti‐Freezing and Heat‐Tolerant Symmetric Microsupercapacitor with 2.3 V Output Voltage

Jin

Song

Dai

et al. 2021

Advanced Energy Materials

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“…On the other hand, there are only limited studies reporting PVA-based materials tested under sub-zero temperatures 12 . With the gradual freezing of conventional PVA-based materials below ice point, these materials tend to lose their exibility and stretchability towards low temperatures (such as -30 °C) and even fewer reliable approaches have been proposed to solve the poor stretchability of PVA-based materials under these circumstances 13,14 . However, extreme and complex environments in practice like labeling and transfering foods and biosamples at cryogenic temperature pose great challenges to current materials, especially for the supercold tolerance 15 .Therefore, it is of great importance but still chanllengable to explore robust and toughness materials that can tolerate supercold conditions.…”

Section: Introductionmentioning

confidence: 99%

Development of a multifunctional nanocomposite film with record-high ultralow temperature toughness and unprecedented fatigue-resistance

Jiang

Wei

et al. 2022

Chemical Engineering Journal

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In the quest of materials that can tolerate extreme environments (i.e., aerospace, polar regions of earth), facile design of self-healing, high fatigue-resistant and multifunctional nanocomposite materials with excellent ultralow temperature toughness, especially by utilizing inexpensive and sustainable bioresources is still currently challengeable. In current study, we present a material that displays remarkable ultralow temperature toughness, shows excellent toughness (107.3 MJ•m -3 ) at − 196°C and maintains high mechanical strength in highly humid environments. This material is a spider silk-inspired, poly(vinyl alcohol) (PVA)-based, autonomous room temperature self-healable nanocomposite by complexation of boron nitride (BN), quantum dots (QDs) and soybean protein isolate grafted lignin (SPIlignin). The fabricated material, namely PVA-BN-QDs-SPI-lignin, simultaneously exhibits outstanding tensile strength (53.3 MPa), toughness (182.8 MJ•m -3 ), fatigue-resistance as well as antiultraviolet and uorescent properties and sets an impressive new record of folding-failure (900 000 times) and toughness, which are 10.6 to 45.7 times higher than other graphene-based nanocomposites. It can be impressively self-healed within only 2 minutes. Of particular interest is its facile, green, mild and inexpensive preparation method that can be easily scale up. It is believed that this work, beginning with abundant biodegradable resources, opens the door to develop biobased multifunctional materials in practical applications, such as exible wearable materials.

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“…The comparison of the AMP‐tackified organohydrogel‐based supercapacitor with recently reported gel‐based supercapacitors is presented in Figure 5f. [ 11,13,24,27,48 ] The nucleotide‐tackified organohydrogel‐based supercapacitor featured superior performances with strong interfacial adhesion, satisfied conductivity, high specific capacitance, excellent low temperature tolerance, and anti‐drying ability. These merits meet the demands of flexible energy storage devices.…”

Section: Resultsmentioning

confidence: 99%

Nucleotide‐Tackified Organohydrogel Electrolyte for Environmentally Self‐Adaptive Flexible Supercapacitor with Robust Electrolyte/Electrode Interface

Zhang

Hou

Liu

et al. 2021

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Hydrogel electrolytes have attracted enormous attention in flexible and safe supercapacitors. However, the interfacial contact problem between hydrogel electrolyte and electrodes, and the environmental instability are the key factors restricting the development of hydrogel‐based supercapacitors. Here, a nucleotide‐tackified adhesive organohydrogel electrolyte is successfully constructed and exhibits freezing resistance and water‐holding ability based on the water/glycerol binary solvent system. Adenosine monophosphate enables the organohydrogels to possess outstanding adhesion and mechanical robustness. The robust adhesion can ensure close contact between the organohydrogel electrolyte and electrodes for constructing an all‐in‐one supercapacitor with low interfacial contact resistance. Impressively, the integrated organohydrogel‐based supercapacitors display an areal specific capacitance of 163.6 mF cm−2. Besides, the supercapacitors feature prominent environmental stability with capacitance retention of 90.6% after 5000 charging/discharging cycles at −20 °C. Furthermore, based on the strong interfacial adhesion, the supercapacitors present excellent electrochemical stability without delamination/displacement between electrolyte and electrodes even under severe deformations such as bending and twisting. It is anticipated that this work will provide an encouraging way for developing flexible energy storage devices with electrochemical stability and environmental adaptability.

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Stretchable supercapacitor at −30 °C

Abstract: At relatively low temperature (e.g, -30 oC), most flexible supercapacitors that work well at room temperature will lose their stretchability due to the poor cold intolerance of conventional electrolytes and...

Cited by 150 publications

References 76 publications

An Aqueous Anti‐Freezing and Heat‐Tolerant Symmetric Microsupercapacitor with 2.3 V Output Voltage

An Aqueous Anti‐Freezing and Heat‐Tolerant Symmetric Microsupercapacitor with 2.3 V Output Voltage

Development of a multifunctional nanocomposite film with record-high ultralow temperature toughness and unprecedented fatigue-resistance

Nucleotide‐Tackified Organohydrogel Electrolyte for Environmentally Self‐Adaptive Flexible Supercapacitor with Robust Electrolyte/Electrode Interface

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