Passion fruit-like microspheres of FeS<sub>2</sub> wrapped with carbon as an excellent fast charging material for supercapacitors

Liu, Xuexia; Deng, Wubing; Liu, Limin; Wang, Yin-Feng; Huang, Chunfang; Wang, Zhijun

doi:10.1039/d2nj01749k

Cited by 7 publications

(8 citation statements)

References 46 publications

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“…As current density changes from 1 A g –1 to 5 A g –1 , the energy density decreases from 16.8 at 800 W kg –1 to 7.89 Wh kg –1 at 4000 W kg –1 . Ragone plots exhibit both the energy density and power density of some previously reported devices assembled from similar sulfides, such as Cu 2 MoS 4 SSC (3.92 Wh, kg 1– @ 1250 W kg 1– ), Cu 2 MoS 4 /Ni SSC (23.61 Wh kg 1– @ 1000 W kg 1– ), CuS/three-dimensional graphene SSC (5 Wh kg 1– @ 450 W kg 1– ), MoS 2 SSC (4.19 Wh kg 1– @ 225W kg 1– ), and FeS 2 @carbon//AC ASC (13.6 Wh kg 1– @ 683.8 W kg 1– ) . The comparison with other negative electrode materials is given in Table S3, which further confirms the application potential of the electrode in the present work as an ideal supercapacitor negative electrode.…”

Section: Resultsmentioning

confidence: 99%

Dual-Phase Coexistence Design and Advanced Electrochemical Performance of Cu₂MoS₄ Electrode Materials for Supercapacitor Application

Pian

Liu

et al. 2023

Energy Fuels

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The tetragonal layered transition metal copper−molybdenum sulfide Cu 2 MoS 4 (CMS) possesses a high theoretical electrochemical potential because of its abundant redox properties and large layered surface area, which is favorable for ion adsorption/desorption and transport. Cu 2 MoS 4 contains P and I phases, exhibiting different crystal structures, ion transport characteristics, and electrochemical properties accordingly. In this work, for the first time, Cu 2 MoS 4 electrode materials with dual-phase compositions are designed and prepared for supercapacitor application, providing a synergistic effect with high electron transport efficiency and structural stability. Upon an in-depth optimization process, the optimal CMS-4 sample having P and I phases coexisting yields the optimal electrochemical behavior. The CMS-4@carbon cloth (CC) electrode provides a specific capacity of 33.9 mAh g −1 at 1 A g −1 , which is 12.6 and 4.0 times higher than the pure P and I phases, respectively. The assembled MnO 2 @CC//CMS-4@CC supercapacitor exhibits a high energy density of 16.8 Wh kg −1 at 800 W kg −1 power density. The results demonstrate that two-phase coexistence of Cu 2 MoS 4 significantly enhances the electrochemical activities owing to the synergistic effects of P and I phases and provides a promising material for supercapacitor negative electrodes.

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Section: Resultsmentioning

confidence: 99%

Dual-Phase Coexistence Design and Advanced Electrochemical Performance of Cu₂MoS₄ Electrode Materials for Supercapacitor Application

Pian

Liu

et al. 2023

Energy Fuels

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“…The power density of 260.5 Wkg −1 was moderate compared to the literature values ranging from 175 to 639 Wkg −1 . 31,33 The obtained energy density was 116.8 Wh kg −1 , which is the highest energy density among those reported for pure FeS 2 -based electrode materials, where the literature values range from 47 to 79 Wh kg −1 . 23,24 According to these results, the developed FeS 2 -based electrode approaches the level of practical significance.…”

Section: Electrochemical Analysismentioning

confidence: 67%

“…Moreover, the size of each flake is too thick to demonstrate the effect of the nanostructures through nanometer-level control, and the method of artificially controlling the structure of FeS 2 is limited in situations that rely on a simple hydrothermal method. In addition to the aforementioned FeS 2 nanostructures, FeS 2 nanospheres, microspheres, and FeS 2 nanoparticles of less than 100 nm have been attached to graphene (FeS 2 /GNS) and evaluated as electrode materials. − Notably, FeS 2 nanoparticle/GNS afforded a significantly increased capacity of 721 Fg –1 . However, this is the result of the asymmetric cell of FeS 2 /GNS//Ni(OH) 2 @Co 9 S 8 , whereas it is difficult to attribute the enhanced performance to the nanostructural control of pure FeS 2 …”

Section: Introductionmentioning

confidence: 99%

Fabrication of Assembled FeS₂ Nanosheet and Application for High-Performance Supercapacitor Electrodes

Azimov

Lee

Park

et al. 2023

ACS Appl. Mater. Interfaces

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To overcome the low-energy-density limitation of supercapacitors, we aimed to achieve a material with a high specific capacitance by manipulating the nanostructure of FeS2, which comprises the most abundant and affordable elements. In this study, nanosheet-assembled FeS2 (NSA-FeS2) was fabricated using a novel method. Sub-micron droplets of sulfur particles stabilized with polyvinylpyrrolidone were formed in silicone oil medium, and Fe(CO)5 was absorbed and reacted on the surface to form core-shell particles, ES/[Fe], with a sulfur core and an iron-containing outer shell. The high temperature treatment of ES/[Fe] produced NSA-FeS2, in which pyrite FeS2 nanosheets grew and were partially interconnected. In a three-electrode system, the as-prepared NSA-FeS2 and NSA-FeS2/polyaniline (PANI) composites exhibited specific capacitances of 763 and 976 Fg–1, respectively, at a current density of 0.5 Ag–1, with corresponding capacitance retentions of 93 and 96% after 3000 charge–discharge cycles. The capacitance retention of the NSA-FeS2/PANI composites was 49% when the current density was increased from 0.5 to 5 Ag–1. Notably, the obtained specific capacitances exhibited the highest values in pure FeS2 and FeS2-based composites, indicating the significant potential for the utilization of iron sulfide in pseudocapacitive electrode materials.

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“…The use of 3DPC as FeS 2 substrate can improve the conductivity of the electrode material and effectively inhibit the volume collapse of FeS 2 . Liu et al reported a facile hydrothermal method coupled with an etching method to synthesize passion fruit-like FeS 2 @Carbon microspheres . The FeS 2 @Carbon microsphere-based electrode exhibits electrochemical performance with a specific capacity of 278.4 F g –1 at 1 A g –1 and a capacity retention of 57.7% at 5 A g –1 after 10,000 cycles.…”

Section: Introductionmentioning

confidence: 99%

Iron Sulfide Microspheres Supported on Cellulose-Carbon Nanotube Conductive Flexible Film as an Electrode Material for Aqueous-Based Symmetric Supercapacitors with High Voltage

Parayangattil Jyothibasu,

Tien,

Chen

et al. 2024

ACS Omega

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Nanostructured iron disulfide (FeS 2 ) was uniformly deposited on regenerated cellulose (RC) and oxidized carbon nanotube (CNT)-based composite films using a simple chemical bath deposition method to form RC/CNT/FeS 2 composite films. The RC/CNT composite film served as an ideal substrate for the homogeneous deposition of FeS 2 microspheres due to its unique porous architecture, large specific surface area, and high conductivity. Polypyrrole (PPy), a conductive polymer, was coated on the RC/CNT/FeS 2 composite to improve its conductivity and cycling stability. Due to the synergistic effect of FeS 2 with high redox activity and PPy with high stability and conductivity, the RC/ CNT/FeS 2 /PPy composite electrode exhibited excellent electrochemical performance. The RC/CNT/0.3FeS 2 /PPy-60 composite electrode tested with Na 2 SO 4 aqueous electrolyte could achieve an excellent areal capacitance of 6543.8 mF cm −2 at a current density of 1 mA cm −2 . The electrode retained 91.1% of its original capacitance after 10,000 charge/discharge cycles. Scanning electron microscopy (SEM) images showed that the ion transfer channels with a pore diameter of 5−30 μm were formed in the RC/ CNT/0.3FeS 2 /PPy-60 film after a 10,000 cycle test. A symmetrical supercapacitor device composed of two identical pieces of RC/ CNT/0.3FeS 2 /PPy-60 composite electrodes provided a high areal capacitance of 1280 mF cm −2 , a maximum energy density of 329 μWh cm −2 , a maximum power density of 24.9 mW cm −2 , and 86.2% of capacitance retention after 10,000 cycles at 40 mA cm −2 when tested at a wide voltage window of 1.4 V. These results demonstrate the greatest potential of RC/CNT/FeS 2 /PPy composite electrodes for the fabrication of high-performance symmetric supercapacitors with high operating voltages.

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Passion fruit-like microspheres of FeS₂ wrapped with carbon as an excellent fast charging material for supercapacitors

Abstract: Pyrite (FeS2) has attracted growing attention as pseudocapacitance electrode materials for supercapacitors. However, the fast capacity fading and the poor cycling performance, greatly hinder its practical application. Herein, a facile...

Cited by 7 publications

References 46 publications

Dual-Phase Coexistence Design and Advanced Electrochemical Performance of Cu₂MoS₄ Electrode Materials for Supercapacitor Application

Dual-Phase Coexistence Design and Advanced Electrochemical Performance of Cu₂MoS₄ Electrode Materials for Supercapacitor Application

Fabrication of Assembled FeS₂ Nanosheet and Application for High-Performance Supercapacitor Electrodes

Iron Sulfide Microspheres Supported on Cellulose-Carbon Nanotube Conductive Flexible Film as an Electrode Material for Aqueous-Based Symmetric Supercapacitors with High Voltage

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Passion fruit-like microspheres of FeS2 wrapped with carbon as an excellent fast charging material for supercapacitors

Abstract: Pyrite (FeS2) has attracted growing attention as pseudocapacitance electrode materials for supercapacitors. However, the fast capacity fading and the poor cycling performance, greatly hinder its practical application. Herein, a facile...

Cited by 7 publications

References 46 publications

Dual-Phase Coexistence Design and Advanced Electrochemical Performance of Cu2MoS4 Electrode Materials for Supercapacitor Application

Dual-Phase Coexistence Design and Advanced Electrochemical Performance of Cu2MoS4 Electrode Materials for Supercapacitor Application

Fabrication of Assembled FeS2 Nanosheet and Application for High-Performance Supercapacitor Electrodes

Iron Sulfide Microspheres Supported on Cellulose-Carbon Nanotube Conductive Flexible Film as an Electrode Material for Aqueous-Based Symmetric Supercapacitors with High Voltage

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Product

Resources

About

Passion fruit-like microspheres of FeS₂ wrapped with carbon as an excellent fast charging material for supercapacitors

Dual-Phase Coexistence Design and Advanced Electrochemical Performance of Cu₂MoS₄ Electrode Materials for Supercapacitor Application

Dual-Phase Coexistence Design and Advanced Electrochemical Performance of Cu₂MoS₄ Electrode Materials for Supercapacitor Application

Fabrication of Assembled FeS₂ Nanosheet and Application for High-Performance Supercapacitor Electrodes