Rational design of forest-like nickel sulfide hierarchical architectures with ultrahigh areal capacity as a binder-free cathode material for hybrid supercapacitors

Raju, Ganji Seeta Rama; Pavitra, E.; Nagaraju, Goli; Sekhar, S. Chandra; Ghoreishian, Seyed Majid; Kwak, Cheol Hwan; Yu, Jae Su; Han, Young‐Kyu

doi:10.1039/c8ta02597e

Cited by 85 publications

(27 citation statements)

References 63 publications

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“…However, solar/wind‐powered system is not complete without effective energy storage system, which leads to the rising search for perpetual storage devices . Among various energy storage devices, supercapacitors (SCs) have attracted tremendous attention owing to their desirable features of high‐power density, quick charging ability, long‐term durability, easy fabrication, and low cost . Accordingly, they have been widely used in various electronic devices including military devices, plug‐in electric vehicles, cold‐start assistance, memory back‐up sources, etc .…”

Section: Introductionmentioning

confidence: 99%

An Integrated Approach Toward Renewable Energy Storage Using Rechargeable Ag@Ni_0.67Co_0.33S‐Based Hybrid Supercapacitors

Nagaraju

Sekhar

Ramulu

2019

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Self‐powered charging systems in conjunction with renewable energy conversion and storage devices have attracted promising attention in recent years. In this work, a prolific approach to design a wind/solar‐powered rechargeable high‐energy density pouch‐type hybrid supercapacitor (HSC) is proposed. The pouch‐type HSC is fabricated by engineering nature‐inspired nanosliver (nano‐Ag) decorated Ni0.67Co0.33S forest‐like nanostructures on Ni foam (nano‐Ag@NCS FNs/Ni foam) as a battery‐type electrode and porous activated carbon as a capacitive‐type electrode. Initially, the core–shell‐like NCS FNs/Ni foam is prepared via a single‐step wet‐chemical method, followed by a light‐induced growth of nano‐Ag onto it for enhancing the conductivity of the composite. Utilizing the synergistic effects of forest‐like nano‐Ag@NCS FNs/Ni foam as a composite electrode, the fabricated device shows a maximum capacitance of 1104.14 mF cm−2 at a current density of 5 mA cm−2 and it stores superior energy and power densities of 0.36 mWh cm−2 and 27.22 mW cm−2, respectively along with good cycling stability, which are higher than most of previous reports. The high‐energy storage capability of HSCs is further connected to wind fans and solar cells to harvest renewable energy. The wind/solar charged HSCs can effectively operate various electronic devices for a long time, enlightening its potency for the development of sustainable energy systems.

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Section: Introductionmentioning

confidence: 99%

An Integrated Approach Toward Renewable Energy Storage Using Rechargeable Ag@Ni_0.67Co_0.33S‐Based Hybrid Supercapacitors

Nagaraju

Sekhar

Ramulu

2019

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108

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“…Currently, the requirements for renewable energy resources and energy storage devices are being increased rapidly with the fast development of technology and the social progress [1, 2]. The properties of fast charge-discharge rate, better safety feature, high power density, and long-life span make supercapacitors become one of the most promising candidates for traditional energy storage devices.…”

Section: Introductionmentioning

confidence: 99%

Design of NiO Flakes@CoMoO4 Nanosheets Core-Shell Architecture on Ni Foam for High-Performance Supercapacitors

et al. 2019

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As typical electrode materials for supercapacitors, low specific capacitance and insufficient cycling stability of transition metal oxides (TMOs) are still the problems that need to be solved. Design of core-shell structure is considered as an effective method for preparation of high-performance electrode materials. In this work, NiO flakes@CoMoO 4 nanosheets/Ni foam (NiO flakes@CoMoO 4 NSs/NF) core-shell architecture was constructed by a two-step hydrothermal method. Interestingly, the CoMoO 4 NSs are vertically grown on the surface of NiO flakes, forming a two-dimensional (2D) branched core-shell structure. The porous core-shell architecture has relatively high surface area, effective ions channels, and abundant redox sites, resulting in excellent electrochemical performance. As a positive electrode for supercapacitors, NiO flakes@CoMoO 4 NSs/NF core-shell architecture exhibits excellent capacitive performance in terms of high specific capacitance (1097 F/g at 1 A/g) and outstanding cycling stability (97.5% after 2000 circles). The assembled asymmetric supercapacitor (ASC) of NiO flakes@CoMoO 4 NSs/NF//active carbon (AC)/NF possesses a maximum energy density of 25.8 Wh/kg at power density of 894.7 W/kg. The results demonstrate that NiO flakes@CoMoO 4 NSs/NF electrode displays potential applications in supercapacitors and the design of 2D branched core-shell architecture paves an ideal way to obtain high-performance TMOs electrodes. Electronic supplementary material The online version of this article (10.1186/s11671-019-3054-3) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

“…With the rapid depletion of traditional fossil energy sources, sustainable energies have been becoming the major resources for satisfying the rapid demand of energy development system. [1][2][3] Recently, more and more studies are focusing on the efficient transformation strategies of energy storage materials. [4][5][6] Especially, supercapacitors (SCs) have obtained great attention owing to their rapid discharging and charging processes, good recoverability and long-term service life.…”

Section: Introductionmentioning

confidence: 99%

Dandelion‐like Nanospheres Synthesized by CoO@CuO Nanowire Arrays for High‐Performance Asymmetric Supercapacitors

Huang

Zhong

et al. 2022

ChemElectroChem

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Recently, three-dimensional-structure materials have attracted enormous attention in energy-storage fields on account of their excellent electrochemical performance. In this study, hierarchical nanospheres consisting of mesoporous CoO@CuO nanowires on a three-dimensional conductive Ni foam are prepared by a one-step hydrothermal method combined with a subsequent annealing process. Compared to CoO or CuO alone, the as-obtained CoO@CuO/Ni hybrid nanowires show good electronic conductivity owning to the abundant existence of O vacancies in them. In a three-electrode system, the area capacitance of the prepared CoO@CuO/Ni electrode reaches 2.94 F cm À 2 (1.32 C cm À 2 ) at 1 mA cm À 2 , and the CoO@CuO/Ni electrode presents an outstanding cycle performance. Moreover, a CoO@CuO/Ni//AC ASC asymmetric supercapacitor is fabricated and found to display a high energy density of 20.22 Wh kg À 1 at 800 W kg À 1 . Hence, this novel CoO@CuO/Ni hybrid nanowires with excellent electrochemical properties shows outstanding potential in the practical application of high-energy storage devices.

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Rational design of forest-like nickel sulfide hierarchical architectures with ultrahigh areal capacity as a binder-free cathode material for hybrid supercapacitors

Abstract: The forest-like NiS hierarchical architectures demonstrated superior electrochemical performance with excellent cycling stability.

Cited by 85 publications

References 63 publications

An Integrated Approach Toward Renewable Energy Storage Using Rechargeable Ag@Ni_0.67Co_0.33S‐Based Hybrid Supercapacitors

An Integrated Approach Toward Renewable Energy Storage Using Rechargeable Ag@Ni_0.67Co_0.33S‐Based Hybrid Supercapacitors

Design of NiO Flakes@CoMoO4 Nanosheets Core-Shell Architecture on Ni Foam for High-Performance Supercapacitors

Dandelion‐like Nanospheres Synthesized by CoO@CuO Nanowire Arrays for High‐Performance Asymmetric Supercapacitors

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Rational design of forest-like nickel sulfide hierarchical architectures with ultrahigh areal capacity as a binder-free cathode material for hybrid supercapacitors

Abstract: The forest-like NiS hierarchical architectures demonstrated superior electrochemical performance with excellent cycling stability.

Cited by 85 publications

References 63 publications

An Integrated Approach Toward Renewable Energy Storage Using Rechargeable Ag@Ni0.67Co0.33S‐Based Hybrid Supercapacitors

An Integrated Approach Toward Renewable Energy Storage Using Rechargeable Ag@Ni0.67Co0.33S‐Based Hybrid Supercapacitors

Design of NiO Flakes@CoMoO4 Nanosheets Core-Shell Architecture on Ni Foam for High-Performance Supercapacitors

Dandelion‐like Nanospheres Synthesized by CoO@CuO Nanowire Arrays for High‐Performance Asymmetric Supercapacitors

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An Integrated Approach Toward Renewable Energy Storage Using Rechargeable Ag@Ni_0.67Co_0.33S‐Based Hybrid Supercapacitors

An Integrated Approach Toward Renewable Energy Storage Using Rechargeable Ag@Ni_0.67Co_0.33S‐Based Hybrid Supercapacitors