A novel all-in-one integrated flexible supercapacitor based on self-healing hydrogel electrolyte

Gao, Xiaojie; Hu, Qinzheng; Sun, Kanjun; Peng, Hui; Xie, Xuan; Hamouda, Hamouda Adam; Ma, Guofu

doi:10.1016/j.jallcom.2021.161554

Cited by 51 publications

(20 citation statements)

References 41 publications

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“…Remarkably, the energy density of the ASC decreases from 0.33 to 0.18 mW h cm −2 as the power density increases from 1.5 to 15 mW cm −2 . Obviously, the ASC device in this work outperforms most of the previously reported nanomaterials, such as PANI/MCNTs-rGO/TPU fiber (3.45 μW h cm −2 ), 62 ZnO nanowire array-modified fiber (0.027 μW h cm −2 ), 63 all-graphene fiber (0.17 μW h cm −2 ), 64 CNT@Co 3 O 4 yarn (1.10 μW h cm −2 ), 54 CuO@CoFe-LDH NWAs (93.75 μW h cm −2 ), 28 Cu wire/CuO NWs (9.31 μW h cm −2 ), 55 CuO/Co(OH) 2 /rGO (3.33 μW h cm −2 ), 56 GO-(FeCl 3 )/PPy@PLA (3.5 μW h cm −2 ), 65 PVA/PA-PANI (31.7 μW h cm −2 ), 66 and PEDOT:PSS/CNP (30.86 μW h cm −2 ). 67 EIS was also conducted to evaluate the performance of the ASC, and the corresponding Nyquist plot shows R s and R ct values of 0.694 and 7.6 Ω, respectively, in Figure 4e, indicating that the composite material is a potential candidate to meet the requirements of a high-performance ASC device.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

CoNi Layered Double Hydroxide Nanosheets Vertically Grown on Electrodeposited Dendritic Copper Substrates for Supercapacitor Applications

Ren

Zhang

et al. 2022

ACS Appl. Nano Mater.

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Layered double hydroxides (LDHs) have attracted numerous interests in developing high-performance electrochemical supercapacitors (SCs). However, the anchored conductive substrates are critical in the high-dense growth of LDH with favorable crystal orientations for maximizing performances, in which the conventional amorphous carbon-based materials and microporous nickel foams cannot be fitted. Herein, we utilize the electrodeposited 3D dendritic copper as the conductive substrate for the vertical growth of CoNi-LDH nanosheets. The composite possesses excellent electrical conductivity, a high degree of crystallinity with (003) orientation, and a large surface area, resulting in an impressive specific capacitance of 5743 mF cm–2 at 1 mA cm–2 with 56.6% rate capability at 20 mA cm–2 and excellent cycling lifespan. In comparison, pure CoNi-LDH shows a smaller specific capacitance of 1798.18 mF cm–2 at 1 mA cm–2 with 46.1% rate capability at 20 mA cm–2. Such improved electrochemical performances of the composite electrode are possibly due to the sufficient exposure of the active centers, the shortened diffusion distance of electrolyte ions, and the synergistic interaction of the copper core and the LDH shell. The assembled asymmetric supercapacitor device based on the as-prepared composite anode and the activated carbon cathode exhibits an energy density of 0.33 mW h cm–2 at a large power density of 1.5 mW cm–2. This work reveals a facile and feasible strategy for improving the performances of LDH-based SC devices through the engineering of conductive substrates.

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Section: ■ Results and Discussionmentioning

confidence: 99%

CoNi Layered Double Hydroxide Nanosheets Vertically Grown on Electrodeposited Dendritic Copper Substrates for Supercapacitor Applications

Ren

Zhang

et al. 2022

ACS Appl. Nano Mater.

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“…The use of PU/CB as a current collector with high conductivity can lead to rapid electronic transport for electrodes as well as achieve high electrochemical performance. To our knowledge, reports on self-healing conductive electrodes and current collectors for supercapacitor application are rather rare compared with self-healing electrolyte-based supercapacitors. − Furthermore, the interface layer compatibility of both the PU/CB current collector and the PH–MWNT active layer made of polymer composite constitutes a synergistic effect in boosting the conductivity and capacitive performance of the FISH-SC. The energy storage device has a 5.8 μWh cm –2 energy density at 1 mA cm –2 and a 605.6 mW cm –2 maximum power density at 8 mA cm –2 .…”

Section: Introductionmentioning

confidence: 99%

Flexible and Self-Healable Supercapacitor with High Capacitance Restoration

Mai

Nguyen

et al. 2022

ACS Appl. Energy Mater.

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This work reports on the fabrication of a flexible and self-healing high-performance quasi-solid-state supercapacitor that uses a conductive composite electrode. The supercapacitor employs an active layer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT/PSS)–multiwalled carbon nanotube (MWNT)-coated polyurethane/carbon black composite electrode sandwiched with a poly(vinyl alcohol) (PVA)/H3PO4 gel electrolyte. The supercapacitor possesses the highest capacitance over 47 mF cm–2 and a high energy density from 5.8 to 1.7 μWh cm–2 with the corresponding power density changing from 0.13 to 0.61 W cm–2 at a current density from 1 to 8 mA cm–2. The supercapacitor can retain up to 94% of its electrochemical performance even after a fifth severing/healing cycle, and using capacitance retention, it maintains mechanical stability under various bending deformations. As a result, this self-healing supercapacitor features device-level toughness with more than 96% areal capacitance conserved, even under 180° bending (1.6 mm of bending radius). With its high durability and longevity against dynamic deformation and damage, our study demonstrates the high application potential of this supercapacitor in portable/wearable electronics.

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Section: Introductionmentioning

confidence: 99%

“…However, in comparison with aqueous solution electrolytes, HEs display more extensive application prospects because HEs can avoid electrolyte leakage, make the encapsulation easier and show deformability endowing the usage of HEs in flexible devices. [18][19][20][21] So, the design and synthesis of superiorperformance HEs are still challenging and significant. Increment in the specific capacitance of SCs can generally be achieved through the construction of high-specific-capacitance pseudocapacitive electrode materials, for example, conducting polymers and transition metal oxides/hydroxides/sulfides.…”

Section: Introductionmentioning

confidence: 99%

Improvement of quasi-solid-state supercapacitors based on a “water-in-salt” hydrogel electrolyte by introducing redox-active ionic liquid and carbon nanotubes

et al. 2022

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A novel all-in-one integrated flexible supercapacitor based on self-healing hydrogel electrolyte

Cited by 51 publications

References 41 publications

CoNi Layered Double Hydroxide Nanosheets Vertically Grown on Electrodeposited Dendritic Copper Substrates for Supercapacitor Applications

CoNi Layered Double Hydroxide Nanosheets Vertically Grown on Electrodeposited Dendritic Copper Substrates for Supercapacitor Applications

Flexible and Self-Healable Supercapacitor with High Capacitance Restoration

Improvement of quasi-solid-state supercapacitors based on a “water-in-salt” hydrogel electrolyte by introducing redox-active ionic liquid and carbon nanotubes

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