Ionogel electrolyte with dynamic metal-ligand interactions enabled self-healable supercapacitor with high energy density

Wu, Jintian; Huang, Ling; Wang, Shunping; Li, Xinran; Wen, L.; Li, Xiumei; Feng, Tao; Li, Pengyu; Fang, Zixuan; Wu, Mengqiang; Lv, Wei

doi:10.1016/j.ensm.2023.03.003

Cited by 25 publications

(17 citation statements)

References 56 publications

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“…16a). 135 It is worth mentioning that a novel gel electrolyte (P 28 /Zn 2+ /2IL ion gel) was prepared in this system that enables the self-healing of FSCs (Fig. 16b).…”

Section: Sc Device Applicationsmentioning

confidence: 99%

Recent advances in the utilization of covalent organic frameworks (COFs) as electrode materials for supercapacitors

Xu,

Wu,

Wang

et al. 2023

Chem. Sci.

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“…16a). 135 It is worth mentioning that a novel gel electrolyte (P 28 /Zn 2+ /2IL ion gel) was prepared in this system that enables the self-healing of FSCs (Fig. 16b).…”

Section: Sc Device Applicationsmentioning

confidence: 99%

Recent advances in the utilization of covalent organic frameworks (COFs) as electrode materials for supercapacitors

Xu,

Wu,

Wang

et al. 2023

Chem. Sci.

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“…One is that the electrochemically inactive selfhealing substrates are commonly incorporated in self-healing supercapacitor, which is unfavorable to energy density and simple configuration. 38 The second is that the healing effect of these proposed electrolytes usually requires additional stimuli such as heat, magnetism, light, etc., leading to limited practical application because of the required complex and stringent reaction conditions. 39 Although concern is that the self-healing ability is not enough since the efficiency and the repeatability of the functions are still relatively limited for several times.…”

Section: Introductionmentioning

confidence: 99%

“…Although much progress on a self-healing supercapacitor has been made, there are still some key issues that need to be addressed. One is that the electrochemically inactive self-healing substrates are commonly incorporated in self-healing supercapacitor, which is unfavorable to energy density and simple configuration . The second is that the healing effect of these proposed electrolytes usually requires additional stimuli such as heat, magnetism, light, etc., leading to limited practical application because of the required complex and stringent reaction conditions .…”

Section: Introductionmentioning

confidence: 99%

Environmentally Friendly and Self-Healable Supercapacitors Realized by a NaCl-Penetrable Polyampholyte Conductive Hydrogel

Zhang,

Jiang,

et al. 2024

ACS Appl. Energy Mater.

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Environmentally friendly and self-healable supercapacitors (EFSH-supercapacitors) hold promise to support high safety and extend the lifetime when undergoing mechanical loads and, therefore, share great application in flexible wearable electronics. Here, we develop this kind of a supercapacitor through using a polyampholyte (PA) hydrogel that possesses the capability of salt permeation and self-healing. The ionic conductivity of the PA hydrogel is largely enhanced (up to 13.2 mS cm −1 ) by both bonding and adsorbing NaCl salt. The balanced electrical and mechanical performance of NaCl infiltrated PA hydrogel facilitates strong electrode−electrolyte interfacial linkage and low charge transfer resistance, which enables the EFSH-supercapacitor to have stateof-the-art electrochemical properties. We show that supercapacitor after structural failure as PA hydrogel electrolyte is cut into two pieces, for which stored energy was previously completely damped, can now be rapidly (8 min) and repeatedly repaired (∼54% after four times self-healing). We also prove that the damage of the whole supercapacitor including both electrodes and electrolyte can also be successfully repaired. The electrolyte-dried supercapacitor recovers to efficient work by adding synthetic sweat, demonstrating its practical application in wearable electronics.

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“…This ionogel electrolyte not only possesses good flexibility and high mechanical strength of 0.58 MPa but also demonstrates fast self-healing capabilities and a high specific capacitance of 99 F/g at a current density of 0.1 A/g. 15 Chen et al report a hydrogel of a copolymer cross-linked by double linkers of Laponite (synthetic hectorite-type clay) and graphene oxide that not only exhibits an ultrahigh mechanical stretchability of 1000% but also achieves repeated healable performance and high capacitance (180 mF/cm 2 at 0.1 V/s). 16 High metal ions can be introduced into hydrogels by immersion, but the physical properties of the hydrogels will be significantly reduced.…”

Section: ■ Introductionmentioning

confidence: 99%

A Flexible Superhydrophobic Supercapacitor with Enhanced Metal Ion Coordination by Electrochemical Optimization

Wang,

Zheng,

Han

et al. 2024

Energy Fuels

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Portable energy storage is developing rapidly with the miniaturization and integration of devices, and flexible supercapacitors are one of the important development directions. Nevertheless, the performance of most supercapacitors will be dramatically degraded after being eroded by water droplets or repeatedly stretched. In this research, the superhydrophobic electrode is constructed by a chemical modification. After the water droplets impale the electrode surface, they will eject, which prompts the surface dust to roll down and demonstrate a self-cleaning property. Meanwhile, an electrochemistry functionalization strategy was applied onto the hydrogel, which not only enhanced the mechanical properties but also effectively improved the energy storage density. The integrated superhydrophobic supercapacitor has a specific capacitance of 97.2 F/g at a current density of 0.8 mA/cm 2 , and a capacitor retention rate of 95.5% after 3500 cycles. Furthermore, it can withstand bending 2000 times and 24 h of immersion with either strong acid or alkali and can achieve long-term underwater work (3500 h). This versatile supercapacitor has potential applications in integrated flexible electronic systems by powering functional devices in harsh environments.

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Ionogel electrolyte with dynamic metal-ligand interactions enabled self-healable supercapacitor with high energy density

Cited by 25 publications

References 56 publications

Recent advances in the utilization of covalent organic frameworks (COFs) as electrode materials for supercapacitors

Recent advances in the utilization of covalent organic frameworks (COFs) as electrode materials for supercapacitors

Environmentally Friendly and Self-Healable Supercapacitors Realized by a NaCl-Penetrable Polyampholyte Conductive Hydrogel

A Flexible Superhydrophobic Supercapacitor with Enhanced Metal Ion Coordination by Electrochemical Optimization

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