Ultrathin Ni-MOF nanosheet arrays grown on polyaniline decorated Ni foam as an advanced electrode for asymmetric supercapacitors with high energy density

Cheng, Qiuhui; Tao, Kai; Han, Xue; Yang, Yujing; Yang, Zheng; Ma, Qingxiang; Han, Lei

doi:10.1039/c9dt00386j

Cited by 136 publications

(64 citation statements)

References 37 publications

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“…29 Furthermore, the positions of oxidation and reduction peaks shi slightly with increasing the scan rate, which are mainly related to the increment of the internal diffusion resistance and polarization of the electrodes. 42 Fig. 4F shows the GCD curves of PPy-MOF- To evaluate the practical applications of PPy-MOF, a PPy-MOF//AC ASC is fabricated by utilizing PPy-MOF-0.2 composite, AC and 3 M KOH as the positive electrode, negative electrode and electrolyte, respectively.…”

Section: Fabrication Of Asymmetric Supercapacitormentioning

confidence: 99%

“…5A) shows the characteristics of the double layer and faradaic redox behaviors, and no obvious change is observed on the curves with increasing the scan rate from 2 to 50 mV s À1 , indicating a good electrochemical reversibility of the assembled ASC. 42 The ASC is also investigated by GCD test at different current densities from 0.2 to 8 A g À1 (Fig. 5B).…”

Section: Fabrication Of Asymmetric Supercapacitormentioning

confidence: 99%

“…It can be seen that the assembled ASC delivers an energy density of 120.7 W h kg À1 at a power density of 225.0 W kg À1 , while the energy density reaches 40.1 W h kg À1 when the power density is 1500.6 W kg À1 , which is much higher than recently reported ASCs, such as Ni x Co 1Àx (OH) 2 //AC (21.9 W h kg À1 at 348.9 W kg À1 ), 45 Ni-MOF// AC (57.29 W h kg À1 at 160 W kg À1 ), 46 and Ni-MOF/CNT-5//rGO/ C 3 N 4 -3 (36.6 W h kg À1 , 480 W kg À1 ), 47 and Ni-MOF/PANI//AC (45.6 W h kg À1 at 850.0 W kg À1 ). 42 The superior performance of the PPy-MOF composite may be attributed to the following aspects. First, the addition of PPy facilitates the electron transfer of Ni-MOF structure.…”

Section: Fabrication Of Asymmetric Supercapacitormentioning

confidence: 99%

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Incorporating Ni-MOF structure with polypyrrole: enhanced capacitive behavior as electrode material for supercapacitor

Wang

Liu

et al. 2020

RSC Adv.

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Section: Fabrication Of Asymmetric Supercapacitormentioning

confidence: 99%

Section: Fabrication Of Asymmetric Supercapacitormentioning

confidence: 99%

Section: Fabrication Of Asymmetric Supercapacitormentioning

confidence: 99%

See 1 more Smart Citation

Incorporating Ni-MOF structure with polypyrrole: enhanced capacitive behavior as electrode material for supercapacitor

Wang

Liu

et al. 2020

RSC Adv.

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“…The Ni 3 S 2 nanosheet arrays were synthesized by sulfidation of Ni−MOF nanosheet arrays (Ni−MOF/NF), which were synthesized according to our previous work . The obtained Ni−MOF/NF was put in an autoclave containing TAA (0.04 M, ethanol).…”

Section: Methodsmentioning

confidence: 99%

“…The Ni 3 S 2 nanosheet arrays were synthesized by sulfidation of NiÀ MOF nanosheet arrays (NiÀ MOF/NF), which were synthesized according to our previous work. [32] The obtained NiÀ MOF/NF was put in an autoclave containing TAA (0.04 M, ethanol). The autoclave was maintained at 120°C for 6 h. Finally, the Ni 3 S 2 /NF was rinsed thoroughly with ethanol and dried.…”

Section: Synthesis Of Ni 3 S 2 /Nf Nanosheet Arraysmentioning

confidence: 99%

Construction of Hierarchical 2D PANI/Ni₃S₂ Nanosheet Arrays on Ni Foam for High‐Performance Asymmetric Supercapacitors

Cheng

Yang

Han

et al. 2020

Batteries & Supercaps

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In this work, a hierarchical 2D polyaniline (PANI)/Ni3S2 nanosheet arrays on Ni foam (NF) with open network was successfully developed by the growth of Ni3S2 nanosheet arrays derived from 2D Ni−MOF templates followed by the electrodeposition of a layer of PANI nanoflakes. The as‐prepared PANI/Ni3S2/NF was served as self‐standing supercapacitor electrode. The optimized PANI/Ni3S2/NF‐100 electrode exhibits a high areal capacity of 1.56 mA h cm−2 (487.5 mA h g−1) at 5 mA cm−2 and good rate capability (57.7 % retention at 50 mA cm−2), which significantly outperforms individual PANI/NF or Ni3S2/NF. Furthermore, an asymmetric supercapacitor fabricated by PANI/Ni3S2/NF‐100 and activated carbon electrodes can deliver a high energy density of 48.3 W h kg−1 at a power density of 799.8 W kg−1 with outstanding durability (85.7 % retention of the initial capacity) during 15000 consecutive charge‐discharge cycles. The superior electrochemical performance of PANI/Ni3S2/NF‐100 is attributed to the unique hierarchical PANI/Ni3S2 nanosheet arrays structure. Firstly, the hierarchical open network facilitates the electrolyte ions transport. Secondly, the ultrathin 2D Ni3S2 nanosheets lead to abundant electroactive sites for the Faradaic process, and the conductive PANI layer builds superb highway for fast electron transfer. Thirdly, the free‐standing electrode enables fast redox reaction and low interfacial resistance. Finally, the synergetic effect of Ni3S2 and PANI also contributes to the enhanced capacity.

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Vertically Oriented Cu₂₊₁O@Cu‐MOFs Hybrid Clusters for High‐Performance Electrochemical Capacitors

Zheng

Tan

Wang

et al. 2021

Adv Materials Inter

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electrodes can be realized via template approach in which MOFs used as precursors or sacrificial templates to fabricate MOF-derived materials, such as porous carbons, [6] metal oxides, [7][8][9] or metal oxidecarbon composites. [10] As well known, the electrolyte ions can easily diffuse through these micro/mesopores MOFs to facilitate expose reactive sites, which is regarded as the originating active centers for the excellent electrochemical performance of MOFs. However, the high temperature treatment will inevitably cause damage to the unique and intricate porous structure and channels of MOFs. In addition, the annealing process is costly and not environmentally benign. Considering the problem of MOF-derived electrodes, many efforts have been devoted into MOFs' direct application as SCs electrodes materials during the last decade. [11][12][13] However, the low electrical conductivity and random orientation of MOFs restrict the straightforward application of pristine MOFs as SCs electrodes. [14,15] Recently, the templatedirected strategy to synthesis MOFs arrays throughout a highly conductive substrate is recognized as one of the most efficient ways to increase the conductivity and shape the orientation. [16] There have been many excellent works reported by us and others, mainly focusing on using metal oxides, hydroxides, carbonated hydroxides as precursors or templates to prepare highly ordered MOFs array on conductive substrates for SCs electrodes. [17,18] Deng and co-workers reported synthesis of vertically oriented CoNi-MOF on carbon fiber paper by using Co(OH) 2 as the template and precursor, and applied them as electrode materials for SCs which shows a high specific capacitance of 1044 F g −1 and excellent rate capability. [17] We had used the vertically oriented Cu(OH) 2 nanorod array on copper foam as template to synthesize highly oriented star anise-like Co doped Cu-MOF/Cu 2+1 O composite electrode, which exhibit an ultrahigh areal capacity of 1.548 F cm −2 , excellent rate capability, and extraordinary cycling stability. [12] However, the above mentioned template-directed strategy of transform various precursors to MOFs has mainly encountered a series of problems due to the limitation of traditional solvothermal methods: [19] 1) It is difficult to completely turn the precursors into MOFs, but resulting the composite of precursors and MOFs with core-shell structure. 2) the MOFs crystallization rates may hardly match the precursors dissolution in organic solvent. 3) The use of organic solvent under solvothermalThe study of metal-organic framework (MOF) as supercapacitor materials has attracted much attention. Here, a novel vapor-phase approach is developed to in situ grow arrays of Cu 2+1 O (Cu 2 O with metal excess defects) @Cu-MOF clusters on copper foam (CF) from the well-aligned Cu(OH) 2 nanorods in response to the exposure in the ligand gas. Benefiting from highly oriented and hierarchical structure of Cu-MOF clusters arrays, synergistic effect between Cu 2+1 O and Cu-MOF, and intimate connection of ...

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Ultrathin Ni-MOF nanosheet arrays grown on polyaniline decorated Ni foam as an advanced electrode for asymmetric supercapacitors with high energy density

Abstract: High energy density is achieved on an electrode based on ultrathin Ni-MOF nanosheet arrays grown on PANI decorated NF.

Cited by 136 publications

References 37 publications

Incorporating Ni-MOF structure with polypyrrole: enhanced capacitive behavior as electrode material for supercapacitor

Incorporating Ni-MOF structure with polypyrrole: enhanced capacitive behavior as electrode material for supercapacitor

Construction of Hierarchical 2D PANI/Ni₃S₂ Nanosheet Arrays on Ni Foam for High‐Performance Asymmetric Supercapacitors

Vertically Oriented Cu₂₊₁O@Cu‐MOFs Hybrid Clusters for High‐Performance Electrochemical Capacitors

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Ultrathin Ni-MOF nanosheet arrays grown on polyaniline decorated Ni foam as an advanced electrode for asymmetric supercapacitors with high energy density

Abstract: High energy density is achieved on an electrode based on ultrathin Ni-MOF nanosheet arrays grown on PANI decorated NF.

Cited by 136 publications

References 37 publications

Incorporating Ni-MOF structure with polypyrrole: enhanced capacitive behavior as electrode material for supercapacitor

Incorporating Ni-MOF structure with polypyrrole: enhanced capacitive behavior as electrode material for supercapacitor

Construction of Hierarchical 2D PANI/Ni3S2 Nanosheet Arrays on Ni Foam for High‐Performance Asymmetric Supercapacitors

Vertically Oriented Cu2+1O@Cu‐MOFs Hybrid Clusters for High‐Performance Electrochemical Capacitors

Contact Info

Product

Resources

About

Construction of Hierarchical 2D PANI/Ni₃S₂ Nanosheet Arrays on Ni Foam for High‐Performance Asymmetric Supercapacitors

Vertically Oriented Cu₂₊₁O@Cu‐MOFs Hybrid Clusters for High‐Performance Electrochemical Capacitors