Facile fabrication of NiCo-LDH on activated rice husk carbon for high-performance all-solid-state asymmetric supercapacitors

Hu, Hexiang; Li, Kaidi; Li, Xuesong; Wang, Liying; Yang, Xijia; Zhang, Qixian

doi:10.1039/d3nj02592f

Cited by 8 publications

(3 citation statements)

References 48 publications

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“…In recent years, multi-metal layered double hydroxides (LDH) have also attracted much more attention in the design of electrode materials for HSCs. Various successful achievements have been widely reported in the literature [ 171 , 172 , 173 , 174 , 175 , 176 ]. For example, Nagaraju et al [ 173 ] reported a facile and cost-effective process to obtain well-assembled porous Ni-Co LDH nanosheets on conductive textile substrates (Ni-Co LDH NSs/CTs) using a two-electrode system-based electrochemical deposition method.…”

Section: Recent Advances In Materials For Hybrid Supercapacitorsmentioning

confidence: 99%

Electrode Materials, Structural Design, and Storage Mechanisms in Hybrid Supercapacitors

Du,

Lin,

Wang

et al. 2023

Molecules

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Currently, energy storage systems are of great importance in daily life due to our dependence on portable electronic devices and hybrid electric vehicles. Among these energy storage systems, hybrid supercapacitor devices, constructed from a battery-type positive electrode and a capacitor-type negative electrode, have attracted widespread interest due to their potential applications. In general, they have a high energy density, a long cycling life, high safety, and environmental friendliness. This review first addresses the recent developments in state-of-the-art electrode materials, the structural design of electrodes, and the optimization of electrode performance. Then we summarize the possible classification of hybrid supercapacitor devices, and their potential applications. Finally, the fundamental theoretical aspects, charge-storage mechanism, and future developing trends are discussed. This review is intended to provide future research directions for the next generation of high-performance energy storage devices.

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Section: Recent Advances In Materials For Hybrid Supercapacitorsmentioning

confidence: 99%

Electrode Materials, Structural Design, and Storage Mechanisms in Hybrid Supercapacitors

Du,

Lin,

Wang

et al. 2023

Molecules

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“…20 Hu et al grew a layer of Ni−Co double hydroxides on the surface of a rice husk activated-carbon-coated Ni foam electrode; it delivered the specific capacity of 8542.5 mF cm −2 at 2 mA cm −2 current density. 21 Shaku et al activated marula nutshell waste using KOH and used it for supercapacitor applications. It exhibited the capacitance of 248 F g −1 and energy density of 28.4 Wh kg −1 in 2.5 M KNO 3 electrolyte solution.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In a 6 M KOH solution, the electrode demonstrated a specific capacitance of 162.4 F g –1 at a current density of 1 A g –1 in 6 M KOH solution . Hu et al grew a layer of Ni–Co double hydroxides on the surface of a rice husk activated-carbon-coated Ni foam electrode; it delivered the specific capacity of 8542.5 mF cm –2 at 2 mA cm –2 current density . Shaku et al activated marula nutshell waste using KOH and used it for supercapacitor applications.…”

Section: Introductionmentioning

confidence: 99%

Effects of Potassium-Based Activating Agents on the Biochar Derived from Coconut Tree Husk for Enhancing the Surface Area and Supercapacitor Performance

Ajin,

Chandra Bose

2024

Energy Fuels

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The growing demands for environmental and energy sustainability drive the development of energy storage devices with high energy and power densities and, consequently, potential electrode materials. The conversion of biomass waste into sustainable electrode materials has attracted much attention in the scientific community for energy storage applications. In this work, porous carbon is derived from the agricultural biowaste of the coconut tree (Cocos nucifera) husk. This biowaste is activated through a chemical activation method using different activating agents, such as K2CO3, KOH, KMnO4, KCl, KBr, and KI. Among the samples, biomass-derived carbon activated using the KMnO4 activating agent (AC3) delivers a high specific surface area of 2333.4 m2 g–1 with a pore volume of 2.625 cm3 g–1, which results in excellent electrochemical performance, with a gravimetric capacitance of 560 F g–1 at 2 A g–1 current density in 2 M KOH electrolyte solution. To demonstrate the real-time application, symmetric aqueous (KOH) and gel [poly(vinyl alcohol)-PVA/KOH] electrolyte devices are fabricated using the AC3@graphite sheet as positive and negative electrodes. The fabricated symmetric gel electrolyte device achieves a high gravimetric capacitance of 276 F g–1 at the current density of 2 A g–1. The above device manifests an energy density of 38.3 Wh kg–1 at a power density of 1 kW kg–1. Besides, the cycle stability retains 98% even after 5000 cycles at 10 A g–1 current density. These superior electrochemical outcomes suggest that this AC3@graphite sheet electrode will have potential in electric double-layer supercapacitors.

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Preparation of Sea Urchin‐Like Co/Ni Alloy Compounds for Pseudocapacitive Supercapacitor

Wei,

Hu,

Tian

et al. 2024

Energy Tech

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Energy density and power density are the two most crucial metrics in advanced electrochemical energy storage (EES) devices. The design of pseudocapacitor materials with good structure and reasonable composition can ensure that the power density can be greatly increased under the condition of little or no reduction in energy density. However, how to reasonably design excellent pseudocapacitor materials is still a huge challenge. Herein, layered double hydroxides containing Ni and Co elements on carbon materials derived from distillers’ grains by hydrothermal synthesis (NiCo‐LDH/JKPC‐2) are grown. The fabricated NiCo‐LDH/JKPC‐2 has exhibited a sea urchin‐like nanostructure that primarily consists of mesoporous and possesses a high specific surface area (303 m2 g−1), which facilitates the formation of larger active sites, thereby increasing the rate of charge transport. The specific capacitance of the NiCo‐LDH/JKPC‐2 reaches a maximum value of 1454 F g−1 at 1 A g−1. When it combines with carbon materials originating from distillers’ grains, the assembled asymmetric supercapacitor electrode exhibits a remarkable energy density (40.86 Wh kg−1 at 775 W kg−1) and superior power density (7750.8 W kg−1 at 21.53 Wh kg−1). Thus, the NiCo‐LDH/JKPC‐2 asymmetric supercapacitor electrode can be considered as a potential candidate in advanced energy storage device systems.

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Facile fabrication of NiCo-LDH on activated rice husk carbon for high-performance all-solid-state asymmetric supercapacitors

Abstract: NiCo-LDH@RHC electrode material was prepared by calcination and hydrothermal method from rice husk. The nanoflower structure provides more active sites, promotes ion diffusion, and therefore has excellent specific capacitance and cycling properties.

Cited by 8 publications

References 48 publications

Electrode Materials, Structural Design, and Storage Mechanisms in Hybrid Supercapacitors

Electrode Materials, Structural Design, and Storage Mechanisms in Hybrid Supercapacitors

Effects of Potassium-Based Activating Agents on the Biochar Derived from Coconut Tree Husk for Enhancing the Surface Area and Supercapacitor Performance

Preparation of Sea Urchin‐Like Co/Ni Alloy Compounds for Pseudocapacitive Supercapacitor

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