NiCo2S4 nanosheet grafted SiO2@C core-shelled spheres as a novel electrode for high performance supercapacitors

Sajjad, Muhammad; Jiang, Ye; Guan, Linlin; Xu, Chen; Iqbal, Azhar; Zhang, Shuyu; Ren, Yang; Zhou, Xiaowei

doi:10.1088/1361-6528/ab4d0a

Cited by 59 publications

(15 citation statements)

References 51 publications

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“…26 Another important phenomenon that can be extracted from the CV curves is the reaction kinetics of the electrodes. The CV curves of any electrode can be described as follows: 42 = I av b (1) where I is the current, v designates the scan rate, and a and b are the adjustable parameters. The value of b can be extracted from the slope of the plot log(i) vs log(v), as described in Figure 4d.…”

Section: Resultsmentioning

confidence: 99%

Phosphine-Based Porous Organic Polymer/rGO Aerogel Composites for High-Performance Asymmetric Supercapacitor

Sajjad

Tao

Kang

et al. 2021

ACS Appl. Energy Mater.

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Two-dimensional porous organic polymers (POPs) can offer overlapped π electron clouds between the stacked layers, conjugated skeletons, and multiple high-rate charge carriers transport pathways that include open channels with variable environments. However, in bulk POPs, the active sites tend to be deep-buried and only a small fraction of them could be electrochemically accessible, limiting their corresponding performance. Herein, solvothermal synthesis of phosphine-based POP (Phos-POP, denoted as PP) and rGO aerogel composites (denoted as PPrGOs) is reported where uniform nanosheets of PP can be rapidly grown on rGO aerogel. An asymmetric supercapacitor (ASC) device based on PPrGO-2 cathode and activated carbon (AC) anode can be operated in a wide potential window up to 1.6 V and achieves high cycling stability (88% retained after 12000 cycles) even at a high current density of 7 A g −1 . Encouragingly, our ASC device delivers a high energy density of 33.3 Wh kg −1 with a power density of 3996 W kg −1 , remaining an exceptionally high power density of 8370 W kg −1 with the downfall of the energy density of 9.3 Wh kg −1 , disclosing outstanding capacitive performance. Furthermore, the two-electrode ASC device could light up a red LED for ∼30 s after charging, implying its promising prospect for future energy storage devices. This work provides a way to further enhance the electrochemical performance of POPs based electrode for high-performance SCs.

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Section: Resultsmentioning

confidence: 99%

Phosphine-Based Porous Organic Polymer/rGO Aerogel Composites for High-Performance Asymmetric Supercapacitor

Sajjad

Tao

Kang

et al. 2021

ACS Appl. Energy Mater.

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“…The specific capacitance of NCO-U at different current densities is 1009 F g À1 (0.5 A g À1 ), 914.3 F g À1 (1.0 A g À1 ), 816.1 F g À1 (2.0 A g À1 ) and 598.8 F g À1 (5.0 A g À1 ), which constitutes an improvement over previously reported supercapacitors (Table S3). [49][50][51][52][53][54][55][56][57] F I G U R E 5 (A) Co 2p XPS spectrum, (B) Ni 2p XPS spectrum, and (C) O 1 second XPS spectrum for the as-prepared NCO-U As shown in Figure 7A, the CV curves of different samples at a scan rate of 50 mV s À1 within a potential window ranging from À0.2 to 0.6 V were recorded.…”

Section: Electrochemical Performance As a Supercapacitor Electrodementioning

confidence: 99%

Facile hydrothermal synthesis of urchin‐like NiCo ₂ O ₄ as advanced electrochemical pseudocapacitor materials

et al. 2021

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The urchin-like NiCo 2 O 4 material was prepared by a one-step hydrothermal method. The optimal synthetic conditions were systematically investigated by an orthogonal test method and single factor of hydrothermal time to evaluate the influence of sample morphology and electrochemical performance. The synthesis conditions for preparing NiCo 2 O 4 with different morphologies were systematically studied. In the single factor experiment, when the hydrothermal time is 6, 12, 16, and 24 hours, the corresponding morphologies are urchin-like (NCO-U), flower-like (NCO-F), sheet-like (NCO-S), and block-like (NCO-B), respectively. The element content of the prepared materials under different synthesis conditions was tested by an inductive-coupled plasma emission spectrometer, and an interesting phenomenon was found. As the reaction time

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“…To date, many kinds of biomass sources including animals and plants have been explored as precursors for carbon-based electrode materials [23][24][25][26][27]. In general, biomass carbonaceous materials display manifold microcosmic morphologies, such as tubes, fibers, spheres, and sheets [28][29][30][31][32][33][34][35]. These biomass carbon materials applied for supercapacitors exhibit many advantages of well-distributed pore size, ultrahigh SSA, stable surface chemical properties, and high electric conductivity, which make them promising materials for electrodes of supercapacitors [36,37].…”

Section: Introductionmentioning

confidence: 99%

Nanoporous Carbon Derived from Green Material by an Ordered Activation Method and Its High Capacitance for Energy Storage

Zhou

Chen

et al. 2020

Nanomaterials

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Carbon materials have been widely used as electrode materials for supercapacitors, while the current carbon precursors are mainly derived from fossil fuels. Biomass-derived carbon materials have become new and effective materials for electrodes of supercapacitors due to their sustainability, low pollution potential, and abundant reserves. Herein, we present a new biomass carbon material derived from water hyacinth by a novel activation method (combination of KOH and HNO3 activation). According to the electrochemical measurements, the material presents an ultrahigh capacitance of 374 F g−1 (the current density is 1 A g−1). Furthermore, the material demonstrates excellent rate performance (105 F g−1 at a higher density of 20 A g−1) and ideal cycling stability (87.3% capacity retention after 5000 times charge–discharge at 2 A g−1). When used for a symmetrical supercapacitor device, the material also shows a relatively high capacity of 330 F g−1 at 1 A g−1 (a two-electrode system). All measurements suggest the material is an effective and noteworthy material for the electrodes of supercapacitors.

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NiCo₂S₄ nanosheet grafted SiO₂@C core-shelled spheres as a novel electrode for high performance supercapacitors

Cited by 59 publications

References 51 publications

Phosphine-Based Porous Organic Polymer/rGO Aerogel Composites for High-Performance Asymmetric Supercapacitor

Phosphine-Based Porous Organic Polymer/rGO Aerogel Composites for High-Performance Asymmetric Supercapacitor

Facile hydrothermal synthesis of urchin‐like NiCo ₂ O ₄ as advanced electrochemical pseudocapacitor materials

Nanoporous Carbon Derived from Green Material by an Ordered Activation Method and Its High Capacitance for Energy Storage

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NiCo2S4 nanosheet grafted SiO2@C core-shelled spheres as a novel electrode for high performance supercapacitors

Cited by 59 publications

References 51 publications

Phosphine-Based Porous Organic Polymer/rGO Aerogel Composites for High-Performance Asymmetric Supercapacitor

Phosphine-Based Porous Organic Polymer/rGO Aerogel Composites for High-Performance Asymmetric Supercapacitor

Facile hydrothermal synthesis of urchin‐like NiCo 2 O 4 as advanced electrochemical pseudocapacitor materials

Nanoporous Carbon Derived from Green Material by an Ordered Activation Method and Its High Capacitance for Energy Storage

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NiCo₂S₄ nanosheet grafted SiO₂@C core-shelled spheres as a novel electrode for high performance supercapacitors

Facile hydrothermal synthesis of urchin‐like NiCo ₂ O ₄ as advanced electrochemical pseudocapacitor materials