Fabrication of hierarchical porous nickel based metal-organic framework (Ni-MOF) constructed with nanosheets as novel pseudo-capacitive material for asymmetric supercapacitor

Du, Pengcheng; Dong, Yuman; Liu, Chang; Wei, Wenli; Liu, Dong; Liu, Peng

doi:10.1016/j.jcis.2018.02.010

Cited by 317 publications

(157 citation statements)

References 55 publications

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“…The band at 636 cm −1 was attributed to the stretching vibrations of para-aromatic CH groups and δ-OH [28]. The separated bands between the asymmetric and symmetric stretching modes indicate that, -COOof trimesic acid is coordinated to Ni 2+ or Co 2+ or Ni 2+/ Co 2+ via a bidentate ligand mode and the (BDC) 3metallic exhibits a polymeric structure [20]. This evidence can further confirm that the as-prepared samples are having MOF structure.…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 54%

“…Ni-MOF, Co-MOF and Ni/Co-MOF were synthesized using trimesic acid as organic linker and Ni, Co metal ions from their respective nitrate salts at room temperature. These MOFs were synthesized by a simple hydrothermal method to obtain uniform sized molecules of MOF's [20]. The following procedure was adopted to synthesize individual as well as bimetallic MOF.…”

Section: Synthesis Of Mofsmentioning

confidence: 99%

“…Trimesic acid (0.0525 g, 0.25 mmol) and Ni (NO3)2.6H2O (0.4362 g, 1.5 mmol) were dissolved in 30 ml of N, N-dimethylformamide DMF with stirring at room temperature. The mole ratio of trimesic acid and Ni 2+ was set to 1:6 [20]. After stirring for 30 min, the obtained light green solution was then transfered to a 100 ml Teflon-lined autoclave and heated to 170°C for 16 h. After cooling to room temperature, the precipitate was centrifuged and washed with DMF and ethanol several times.…”

Section: Synthesis Of Mofsmentioning

confidence: 99%

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Electrochemical studies on Ni, Co & Ni/Co-MOFs for high-performance hybrid supercapacitors

Radhika¹,

Gopalakrishna²,

Chaitra³

et al. 2020

Mater. Res. Express

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Metal-organic framework (MOF) of Ni-MOF, Co-MOF, and Ni/Co-MOF were synthesized by a facile hydrothermal method using Trimesic acid as structure directing linker. The physico-chemical properties of the synthesized MOFs were characterized by P-XRD (powder X-ray diffraction), FT-IR (fourier transform infrared spectroscopy), SEM-EDS (scanning electron microscopy/energydispersive X-ray spectroscopy), HR-TEM (high-resolution transmission tlectron microscope) and BET (Brunner Emmett Teller) surface area techniques. The supercapacitance performance of these MOFs were studied by electroanalytical techniques such as cyclic voltammetry (CV), chronopotentiometry (CP) and electrochemical impedance spectroscopy (EIS). Amongst the MOFs investigated, Ni/Co-MOF exhibited highest specific capacitance (C s ) of 2041 F g −1 at a scan rate of 2 mV s −1 and 980 F g −1 at a current density of 2.5 A g −1 . Ni/Co-MOFs delivered a maximum energy density (ED) of 55.7 W h Kg −1 at a corresponding power density (PD) of 1 K W kg −1 and maximum PD of 9.8 K W kg −1 at an ED of 41.6 W h Kg −1 . An outstanding supercapacitance performance with superior columbic efficiency of 98.4% and capacitive retention of 73% after 5000 cycles marks this material as potential candidate for supercapacitors (SCs). A comparative electrochemical study of these MOFs were made in three electrode system, further electrochemical performance was corelated with their physico-chemical properties.

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Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 54%

Section: Synthesis Of Mofsmentioning

confidence: 99%

Section: Synthesis Of Mofsmentioning

confidence: 99%

See 1 more Smart Citation

Electrochemical studies on Ni, Co & Ni/Co-MOFs for high-performance hybrid supercapacitors

Radhika¹,

Gopalakrishna²,

Chaitra³

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

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“…Their values are calculated and the relationship curve is drawn in Figure (g). It can be found that energy density always remains between 14.6 and 31.3 Wh kg −1 at different power densities, which is higher than some reported data. The HA‐NiCo‐BPDC//rGO asymmetric supercapacitor has the maximum energy density of 31.3 Wh kg −1 at a power density of 352 W kg −1 .…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, metal‐organic frameworks (MOFs) have attracted extensive attentions as energy storage materials, especially, supercapacitor electrode materials . MOFs are a porous crystalline material self‐assembled by coordination reactions between transition metal ions and organic ligands containing multiple carboxyl groups or nitrogen electrondonors .…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of Humate‐Layer‐Based Bimetal Organic Framework Composites as High Rate‐Capability and Enery‐Density Electrode Materials for Supercapacitors

Wang

Yang

et al. 2020

ChemistrySelect

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A humate‐layer‐based bimetal organic framework (HA‐NiCo‐BPDC) material is successfully synthesized using humate layers obtained by ultrasonic‐hydrothermal peeling as a substrate and BPDC as a ligand via a hydrothermal approach. It exhibits a porous composite structure in which flower‐like NiCo‐BPDC nanosheets are loaded on humate layers, originating a guiding effect of humate layers on the NiCo‐BPDC growth. HA‐NiCo‐BPDC owns a similar crystal structure to NiCo‐BPDC, in which humate and BPDC ions have coordinated with nickel or cobalt ions to form carboxylates. Nickel and cobalt ions present positive divalent states, and they have close ability to coordinate with BPDC or humate ions. Owing to unique hierarchical architectures and fascinating synergetic effects between NiCo‐BPDC nanosheets and humate layers, HA‐NiCo‐BPDC has high specific capacitance and rate capability, and low internal resistance and charge transfer resistance. It exhibits better rate capability than NiCo‐BPDC and larger specific capacitance than HA−Ni(Co)‐BPDC. Moreover, HA‐NiCo‐BPDC//rGO asymmetric supercapacitor has wide operating potential window, high energy density and cycling stability. All those show that HA‐NiCo‐BPDC composites are a promising electrode material for supercapacitors. This study exploits a novel way for value‐added applications of humates and their natural sources “humic acids”.

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Synergistic Enhancement of Supercapacitors with Cobalt–Copper Bimetal–Organic Framework

Zhang,

Wang,

Dong

et al. 2024

Adv Eng Mater

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Metal‐organic frameworks (MOFs), as high‐potential electrode materials for applications in supercapacitors, have received significant attention recently. Unfortunately, MOF materials still suffer from unsatisfactory specific capacitances due to poor conductivity and limited redox active sites. In this work, a novel cobalt‐copper‐based bimetal–organic framework (CoCu‐MOF) was synthesized by a bottom‐up synthesis strategy, the material properties systematically characterized, and finally investigated as a supercapacitor electrode material. The synthesized CoCu‐MOF presented a high specific surface area of 62.4 m2 g−1, and 83% of the copper ions attained the +1 oxidation state contributing to the formation of additional redox active sites and leading to the formation of dual‐redox sites. The CoCu‐MOF displayed an excellent specific capacitance of 618 F g−1 at a current density of 1 A g−1, which was more than twice that of Co‐MOF and four times that of Cu‐MOF. The CoCu‐MOF retained 75% of its original capacitance after 3000 charge‐discharge cycles at the current density of 1 A g−1. Overall, this work demonstrates how the bimetallic synergistic strategy can effectively enhance the electrochemical properties of MOFs by providing a higher specific surface area and by the introduction of dual redox sites.This article is protected by copyright. All rights reserved.

show abstract

Fabrication of hierarchical porous nickel based metal-organic framework (Ni-MOF) constructed with nanosheets as novel pseudo-capacitive material for asymmetric supercapacitor

Cited by 317 publications

References 55 publications

Electrochemical studies on Ni, Co & Ni/Co-MOFs for high-performance hybrid supercapacitors

Electrochemical studies on Ni, Co & Ni/Co-MOFs for high-performance hybrid supercapacitors

Hydrothermal Synthesis of Humate‐Layer‐Based Bimetal Organic Framework Composites as High Rate‐Capability and Enery‐Density Electrode Materials for Supercapacitors

Synergistic Enhancement of Supercapacitors with Cobalt–Copper Bimetal–Organic Framework

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