In situ encapsulation of V2O5@ZIF-8 nanocomposites as electrode materials for high-performance supercapacitors with long term cycling stability

Siva, V.; Murugan, A.; Shameem, A.; Thangarasu, S.; Kannan, Soundarapandian; Bahadur, S. Asath

doi:10.1039/d2tc03996f

Cited by 15 publications

(3 citation statements)

References 60 publications

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“…In recent years, various metal oxides with high theoretical specific capacitances have been widely investigated as electrode materials for supercapacitors. − However, most of the metal oxides have poor electrical conductivity, resulting in poor rate and cycle performance in supercapacitors. , Recently, certain transition metal chalcogenides have attracted much attention due to their higher electrical conductivity, reduced band gap, and excellent electrochemical activity compared to their transition metal oxide analogues . In particular, iron sulfides have attracted much interest due to their low cost, high theoretical capacity (890 mA h g –1 ), narrow band gap, nontoxic nature, and abundant natural supply. , However, the rate and power capability of iron sulfide-based electrodes need further improvement for their effective utilization in electrochemical energy storage systems.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, various metal oxides with high theoretical specific capacitances have been widely investigated as electrode materials for supercapacitors. 13 − 16 However, most of the metal oxides have poor electrical conductivity, resulting in poor rate and cycle performance in supercapacitors. 17 , 18 Recently, certain transition metal chalcogenides have attracted much attention due to their higher electrical conductivity, reduced band gap, and excellent electrochemical activity compared to their transition metal oxide analogues.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

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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“…Nowadays, significant research is aimed at maintaining significant energy sustainability in this field. As part of the massive effort to accomplish this goal, supercapacitors, also known as ultracapacitors or electrochemical supercapacitors, have drawn a lot of curiosity owing to their valuable features, such as their protracted cyclic stability [6,7], superior power and energy densities [8], and their performance being considerably higher than that of other energy storage devices like faradic batteries, electrostatic capacitors, electrolytic capacitors, ceramic capacitors, etc. [9,10].…”

Section: Introductionmentioning

confidence: 99%

A High-Performance Supercapacitor Based on Hierarchical Template-Free Ni/SnO2 Nanostructures via Hydrothermal Method

Shameem,

Murugan,

Siva

et al. 2024

Materials

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Novel flake-like Ni1−xSnxO2 particles were successfully prepared by template-free hydrothermal synthesis. The prepared samples were investigated for their properties by different characterization techniques. Scanning micrographs showed that the obtained particles consisted of nanoflakes. The X-ray diffraction results of the Ni1−xSnxO2 revealed the formation of mixed-phase Ni/SnO2 having the typical tetragonal structure of SnO2, and the cubic structure of Ni in a nanocrystalline nature. The doping with Ni had a certain influence on the host’s lattice structure of SnO2 at different doping concentrations. Confirmation of the functional groups and the elements in the nanomaterials was accomplished using FTIR and EDS analyses. The electrochemical performance analysis of the prepared nanomaterials were carried out with the help of the CV, GCD, and EIS techniques. The specific capacitance of the synthesized nanomaterials with different concentrations of Ni dopant in SnO2 was analyzed at different scanning rates. Interestingly, a 5% Ni-doped SnO2 nanocomposite exhibited a maximum specific capacitance of 841.85 F g−1 at 5 mV s−1 in a 6 M KOH electrolyte. Further, to boost the electrochemical performance, a redox additive electrolyte was utilized, which exhibited a maximum specific capacitance of 2130.33 at 5 mV s−1 and an excellent capacitance retention of 93.22% after 10,000 GCD cycles. These excellent electrochemical characteristics suggest that the Ni/SnO2 nanocomposite could be utilized as an electrode material for high-performance supercapacitors.

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Facile synthesis and asymmetric device fabrication of zeolite like Co-MOF as a promising electrode material with improved cyclic stability

Siva,

Sanjana,

Murugan

et al. 2024

J Mater Sci: Mater Electron

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In situ encapsulation of V₂O₅@ZIF-8 nanocomposites as electrode materials for high-performance supercapacitors with long term cycling stability

Abstract: The development of hierarchical MOFs consisting of interconnected nanostructures is of great attention in biosensors, energy storage, health care and catalysis as a consequence of efficient mass transfer kinetics by means of mesopores.

Cited by 15 publications

References 60 publications

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

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

A High-Performance Supercapacitor Based on Hierarchical Template-Free Ni/SnO2 Nanostructures via Hydrothermal Method

Facile synthesis and asymmetric device fabrication of zeolite like Co-MOF as a promising electrode material with improved cyclic stability

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