Coordination derived stable Ni–Co MOFs for foldable all-solid-state supercapacitors with high specific energy

Ye, Changjing; Qin, Qingqing; Liu, Jiaqin; Mao, Wenping; Yan, Jian; Wang, Yan; Cui, Jiewu; Zhang, Qi; Yang, Liping

doi:10.1039/c8ta11948a

Cited by 148 publications

(65 citation statements)

References 55 publications

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“…The broad bands at 3483 cm −1 and 2857 cm −1 , which are found only in Ni/Co-MOF are atrributed to the presence of hydroxyl groups and CH stretching vibration respectively [24]. Two strong bands at ∼1629 and ∼1286 cm −1 were assigned to the asymmetric and symmetric stretching modes of the coordinated (COO-) group respectively [28].…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 95%

“…The peak at 1286 cm −1 is also ascribed to the stretching vibration of C-O bond in the uncoordinated free carboxyl on the surface of the MOFs [29]. 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].…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 96%

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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: 95%

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 96%

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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“…Emerging as a new category of crystalline porous materials with ultrahigh porosity and abundant metal active sites, metal-organic frameworks (MOFs) are assembled by the coordination bond between metal ions and organic ligands, giving the enormous application prospects [20][21][22]. Recently, extensive researches related to transition metal-based MOFs have been demonstrated that they are the appealing candidates for energy conversion and storage [23][24][25]. However, most MOFs electrodes unavoidably suffer from inherently low electrical conductivity and instability, which has greatly thwarted their capacitive performances and rate capacities [26,27].…”

Section: Introductionmentioning

confidence: 99%

Ultrathin 2D Metal–Organic Framework Nanosheets In situ Interpenetrated by Functional CNTs for Hybrid Energy Storage Device

Ran¹,

Xu²,

Pan

et al. 2020

Nano-Micro Lett.

128

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HIGHLIGHTS • The ultrathin nickel metal-organic framework (MOF) nanosheets in situ interpenetrated by functional carboxylated carbon nanotubes (C-CNTs) were successfully constructed. The incorporated C-CNTs effectively adjust the layer thickness of Ni-MOF nanosheets. • The integrated hybrid MOF nanosheets delivered the boosted electrochemical performances and exhibited superior specific capacity of 680 C g −1 at 1 A g −1 .

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“…The specific capacitance of 1.0-3# composite electrode retains 83.9 % of its original capacitance (571 F g À 1 ) when the current density is 10 A g À 1 (Figure 6c). Furthermore, EIS confirms the fast ion diffusion process of 1.0-3# composite electrode ( Figure S7) [48,49] . Figure 6d shows the capacity retention of all electrodes after 1000 cycles at a current density of 10 A g À 1 .…”

Section: Resultsmentioning

confidence: 64%

A Novel Polyaniline Nanowire Arrays/Three‐Dimensional Graphene Composite for Supercapacitor

et al. 2020

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It is an effective way to obtain high performance supercapacitors by increasing the surface area and conductivity of electrode materials. In this paper, three‐dimensional (3D) graphene with a small pore size, good electrical conductivity and high mechanical strength is fabricated by chemical vapor deposition using nickel nanoparticles as the template. Then, a polyaniline nanowire arrays (PANI NWAs)/3D graphene composite is fabricated by in‐situ polymerization. Due to the high conductivity and unique nano‐structure, the as‐prepared PANI NWAs/3D graphene composite exhibits an excellent capacitance of 680 F g−1 at current density of 1 A g−1. Moreover, a symmetric supercapacitor based on the PANI NWAs/3D graphene composite is assembled, and it shows an energy density of 6.43 Wh kg−1 at a power density of 0.4 kW kg−1. The assembled supercapacitor also exhibits a good cycling stability, which retains 78 % of its initial specific capacitance after 1000 cycles.

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Coordination derived stable Ni–Co MOFs for foldable all-solid-state supercapacitors with high specific energy

Abstract: Coordination derived stable Ni–Co MOF (833 F g−1) based foldable all-solid-state supercapacitors show a high specific energy of 77.7 W h kg−1.

Cited by 148 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

Ultrathin 2D Metal–Organic Framework Nanosheets In situ Interpenetrated by Functional CNTs for Hybrid Energy Storage Device

A Novel Polyaniline Nanowire Arrays/Three‐Dimensional Graphene Composite for Supercapacitor

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