3D self-supporting heterostructure NiCo-LDH/ZnO/CC electrode for flexible high-performance supercapacitor

Xiong, Haotian; Liu, Lianlian; Fang, Liang; Wu, Fang; Zhang, Shufang; Luo, Hai; Tong, Cunzhu; Hu, Baoshan; Zhou, Miao

doi:10.1016/j.jallcom.2020.158275

Cited by 37 publications

(22 citation statements)

References 32 publications

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“…Meanwhile, the related energy and power density of ASCs devices were calculated. The maximum energy density of our fabricated 3D-NiCo-SDBS-LDH//AC device reached as high as 73.14 W h•kg −1 at power density of 800 W•kg −1 , which is higher than many previously reported NiCo-LDH-based ASCs demonstrated in Table 2 [38,[54][55][56][57][58]. Remarkably, the 3D-NiCo-SDBS-LDH//AC device retained 71.1% capacitance at increasing current density from 1 A•g −1 to 20 A•g −1 (Figure 7e), revealing the good rate performance.…”

Section: Resultscontrasting

confidence: 49%

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Hydrazine Hydrate Induced Three-Dimensional Interconnected Porous Flower-like 3D-NiCo-SDBS-LDH Microspheres for High-Performance Supercapacitor

et al. 2022

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Porous structure and surface defects are important to improve the performance of supercapacitors. In this study, a facile pathway was developed for high-performance supercapacitors, which can produce transition metal hydroxides (LDHs) with abundant porous structure and surface defects. The NiCo-SDBS-LDH was prepared by one-step hydrothermal reaction using sodium dodecylbenzene sulfonate (SDBS) as anionic surfactant. And then, three dimensional (3D) interconnected porous flower-like 3D-NiCo-SDBS-LDH microspheres were designed and synthesized using the gas-phase hydrazine hydrate reduction method. Results showed that the hydrazine hydrate reduction not only introduces a large number of pores into 3D-NiCo-SDBS-LDH microspheres and causes the formation of oxygen vacancies, but it also roughens the surface of the microspheres. All these changes contribute to the enhancement of electrochemical activity of 3D-NiCo-SDBS-LDH; the NiCo-SDBS-LDH electrode after hydrazine hydrate treatment (3D-NiCo-SDBS-LDH) exhibits a higher specific capacitance of 1148 F·g−1 at 1 A·g−1 (about 1.46 times larger than that of NiCo-SDBS-LDH) and excellent long cycle life with 94% retention after 4000 cycles. Moreover, the assembled 3D-NiCo-SDBS-LDH//AC (active carbon) asymmetric supercapacitor (ASC) achieves remarkable energy density of 73.14 W h·kg−1 at 800 W·kg−1 and long-term cycling stability of 95.5% retention for up to 10,000 cycles. The outstanding electrochemical performance can be attributed to the synergy between the rich porous structure and the roughened surface that has been created by the hydrazine hydrate treatment.

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Section: Resultscontrasting

confidence: 49%

“…All electrochemical experiments were performed in 1 M KOH solution on a CHI 760E electrochemical workstation. The electrode's specific capacitance Cs (F•g −1 ) was calculated using Equation (1) [38]:…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Hydrazine Hydrate Induced Three-Dimensional Interconnected Porous Flower-like 3D-NiCo-SDBS-LDH Microspheres for High-Performance Supercapacitor

et al. 2022

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“…Our sample exhibited an energy density of 33.3 WhÁkg À1 at a power density of 2000 WÁkg À1 , which was lower than the energy density of 34 WhÁkg À1 exhibited by the sample of Xiong et al at a power density of 2400 WÁkg À125 However, it is noted that the high energy density reported by Xiong et al could be attributed to the battery-like characteristics of NiCo-LDH/ZnO NF//AC. 25 Thus, the samples in this work are groundbreaking in that they have a wide potential window using a neutral aqueous electrolyte. The energy density of the C-ZPH2 cell was purely attributable to the capacitive charge-storage mechanism.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

“…Metalized fibers, 22,23 carbon cloth, and CNT sheets 24 are good alternatives, but they are relatively more expensive than cotton fabrics. Nevertheless, flexible and lightweight substrates are the most suitable for portable and wearable electronics 25 . In this regard, Ghorbani et al 26 synthesized ZnO/rGO/ZnO sandwich‐type supercapacitor electrodes using the sol‐gel technique.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, flexible and lightweight substrates are the most suitable for portable and wearable electronics. 25 In this regard, Ghorbani et al 26 synthesized ZnO/rGO/ZnO sandwich-type supercapacitor electrodes using the sol-gel technique. Although the electrodes were flexible, they exhibited a low capacitance of 61 FÁg À1 at a scan rate of 5 mVÁs À1 .…”

Section: Introductionmentioning

confidence: 99%

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Wearable fabric supercapacitors based on CNTs and polyhedral ZnO with a wide potential window

Samuel

Joshi

Park

et al. 2022

Intl J of Energy Research

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Summary Wearable electronic devices such as health monitors, sensors, and e‐skin can be powered by lightweight, high‐power supercapacitors. Using a binder‐free and low‐temperature hydrothermal method, polyhedral ZnO nanoparticles were grown on carbon nanotube (CNT)‐decorated cotton fabric, which is friendly to human skin and highly wearable, inexpensive, and thus commercially viable. The concentration of the starting material, zinc acetate, was varied to optimize the electrochemical performance. The evenly spaced polyhedral ZnO facilitated efficient permeation of the electrolyte into the active material. The fabric filaments were decorated with CNTs to enhance electron transfer and the overall electrochemical processes. The symmetric cell comprised of cotton fabric decorated with ZnO polyhedron/CNT showed no discernible change in the cyclic voltammetry curves even after 500 bending cycles, demonstrating the mechanical durability of the electrode. The potential window of 1.6 V using a Na2SO4/K2SO4 aqueous dual‐ion electrolyte improved the long‐term electrochemical stability and increased the energy storage capacity. The capacitance retention was 94% after 5000 cycles at a current density of 1 A·g−1, indicating long‐term electrochemical stability. A specific capacitance of 375 F·g−1 at a current density of 5 A·g−1 and energy density of 33.3 Wh·kg−1 at a power density of 2000 W·kg−1 were recorded for the optimized electrode. Highlights Polyhedral ZnO was grown on cotton fabric using a hydrothermal process. The electrochemical performance was optimized by varying the zinc acetate concentration. The highest specific capacitance was 375 F·g−1 at a current density of 5 A·g−1. Under optimal conditions, the capacitance retention was 94% at N = 5000 cycles. The energy density of the electrode was as high as 33.3 Wh·kg−1.

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Enhanced Electrochemical Performance of NiCo‐Layered Double Hydroxides: Optimal Synthesis Conditions and Supercapacitor Applications

Li,

Shen,

et al. 2024

Advanced Sustainable Systems

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In the quest for high‐performance supercapacitor electrode materials, layered double hydroxides (LDHs) containing transition metals, particularly nickel–cobalt layered double hydroxides (NiCo‐LDH), have garnered significant attention due to their distinctive structural and electrochemical properties. In this study, five different temperatures, five distinct reaction times, and four varied Ni:Co ratios to determine the optimal reaction conditions are established. Utilizing these parameters, NiCo‐LDH via a one‐step hydrothermal method is synthesized. Under optimal conditions the specific capacitance reaches 400.2 C g−1 at a current density of 1 A g−1. The assembled supercapacitor has a high energy density of 51.59 µWh cm−2 at a power density of 1.125 mW cm−2. After 10 000 cycles, the capacity retention is 70%, indicating good cycling stability and demonstrating potential for application in supercapacitors. These tests provide theoretical and data‐based support for subsequent experiments and present new opportunities for advancing energy storage and conversion technologies.

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3D self-supporting heterostructure NiCo-LDH/ZnO/CC electrode for flexible high-performance supercapacitor

Cited by 37 publications

References 32 publications

Hydrazine Hydrate Induced Three-Dimensional Interconnected Porous Flower-like 3D-NiCo-SDBS-LDH Microspheres for High-Performance Supercapacitor

Hydrazine Hydrate Induced Three-Dimensional Interconnected Porous Flower-like 3D-NiCo-SDBS-LDH Microspheres for High-Performance Supercapacitor

Wearable fabric supercapacitors based on CNTs and polyhedral ZnO with a wide potential window

Enhanced Electrochemical Performance of NiCo‐Layered Double Hydroxides: Optimal Synthesis Conditions and Supercapacitor Applications

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