Rational design and facile synthesis of two-dimensional hierarchical porous M3V2O8 (M = Co, Ni and Co–Ni) thin sheets assembled by ultrathin nanosheets as positive electrode materials for high-performance hybrid supercapacitors

Huang, Biao; Wang, Wensong; Pu, Tao; Li, Jie; Zhao, Chenglan; Xie, Li; Chen, Lingyun

doi:10.1016/j.cej.2019.121969

Cited by 148 publications

(51 citation statements)

References 82 publications

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“…The faradaic features of NiCo-MOFs were thought to be caused by the redox reactions of Co and Ni anions under the action of OH − , during the electrochemical experiment. 11,61,65 And the reactions may be probably described as follows, In monometallic counterpart MOF samples, only one metal (Co or Ni) ion undergoes redox reactions. Meanwhile, the CV areas of NiCo-MOF electrodes are larger than those of two monometallic counterpart MOF samples, indicating higher capacitances of NiCo-MOF materials.…”

Section: Resultsmentioning

confidence: 99%

Ni/Co bimetallic organic framework nanosheet assemblies for high-performance electrochemical energy storage

et al. 2020

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Section: Resultsmentioning

confidence: 99%

Ni/Co bimetallic organic framework nanosheet assemblies for high-performance electrochemical energy storage

et al. 2020

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“…Moreover, pseudocapacitors achieve rapid charge–discharge through the rapid and reversible redox reactions on the electrodes or electrode surfaces within a certain potential range. , Because pseudocapacitors can store energy on the surface or inside of the active electrodes, the specific capacitance and electrochemical energy storage of pseudocapacitor materials are superior to those of EDLCs. Based on the foregoing properties, researchers are keen to explore pseudocapacitor electrode materials, such as metal oxides. − …”

Section: Introductionmentioning

confidence: 99%

Defect-Engineered 3D Cross-Network Co₃O_4–xN_x Nanostructure for High-Performance Solid-State Asymmetric Supercapacitors

Xing

Gao

Liang

et al. 2020

ACS Appl. Energy Mater.

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A 3D cross-network Co 3 O 4−x N x nanostructure is obtained from the cobalt−alanine complex (Co(C 3 H 5 O 2 N) 2 ) by amino acid self-assembly and subsequent pyrolysis. In this process, Co(C 3 H 5 O 2 N) 2 forms a 2D sheet structure by intermolecular selfassembly; then, the 2D sheet structure self-assembles to form a 3D cross-network nanostructure, which undergoes pyrolysis to form Co 3 O 4−x N x . The resulting Co 3 O 4−x N x has a 3D cross-network nanostructure with a high specific surface area and suitable pore diameter. The unique 3D cross-network nanostructure of Co 3 O 4−x N x can supply a large amount of active sites, and the pores can promote ion migration, which can reduce volume expansion during cycling. Importantly, the amino acid self-assembly strategy is performed at the molecular level so that the N atoms in alanine (C 3 H 7 O 2 N) migrate in the molecule to form in-situ doping and simultaneously create defects. Defect engineering can facilitate rapid transport of electrons in the electrode, further effectively improving the conductivity of the material, which has been further proved by density functional theory calculations. N-doping can also improve the hydrophilicity of the material. Hence, the Co 3 O 4−x N x -300 electrode shows high specific capacitance (666 Fg −1 at 1 Ag −1 ) and outstanding cycling stability (a capacitance retention rate of 74.1% after 10,000 cycles). In addition, an all-solid-state asymmetric supercapacitor based on the Co 3 O 4−x N x -300 cathode and active carbon anode displays a high energy density of 33.2 W h kg −1 at 751.1 W kg −1 and long cycling stability with a capacitance loss of 15.8% after 5000 cycles. All the experiment results show that the Co 3 O 4−x N x material has great potential as a supercapacitor material. KEYWORDS: supercapacitor, amino acid self-assembly, Co 3 O 4−x N x , defect-engineered, all-solid-state asymmetric device

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“…These redox peaks are caused by the Faradaic reaction due to the electron transfer of CoVO in the KOH electrolyte [ 39 ]. The possible chemical reactions are as follows [ 40 ]:

…”

Section: Resultsmentioning

confidence: 99%

ZIF-67 Derived Co2VO4 Hollow Nanocubes for High Performance Asymmetric Supercapacitors

Zhu

2022

Nanomaterials

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In this work, a new type of Co2VO4 hollow nanocube (CoVO-HNC) was synthesized through an ion exchange process using ZIF-67 nanocubes as a template. The hollow nanocubic structure of the CoVO-HNC provides an abundance of redox sites and shortens the ion/electron diffusion path. As the electrode material of supercapacitors, the specific capacitance of CoVO-HNC is 427.64 F g−1 at 1.0 A g−1. Furthermore, an asymmetric supercapacitor (ASC) was assembled using CoVO-HNC and activated carbon (AC) as electrodes. The ASC device attains an energy density of 25.28 Wh kg−1 at a high-power density of 801.24 W kg−1, with 78% capacitance retention after 10,000 cycles at 10 A g−1.

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Rational design and facile synthesis of two-dimensional hierarchical porous M3V2O8 (M = Co, Ni and Co–Ni) thin sheets assembled by ultrathin nanosheets as positive electrode materials for high-performance hybrid supercapacitors

Cited by 148 publications

References 82 publications

Ni/Co bimetallic organic framework nanosheet assemblies for high-performance electrochemical energy storage

Ni/Co bimetallic organic framework nanosheet assemblies for high-performance electrochemical energy storage

Defect-Engineered 3D Cross-Network Co₃O_4–xN_x Nanostructure for High-Performance Solid-State Asymmetric Supercapacitors

ZIF-67 Derived Co2VO4 Hollow Nanocubes for High Performance Asymmetric Supercapacitors

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Rational design and facile synthesis of two-dimensional hierarchical porous M3V2O8 (M = Co, Ni and Co–Ni) thin sheets assembled by ultrathin nanosheets as positive electrode materials for high-performance hybrid supercapacitors

Cited by 148 publications

References 82 publications

Ni/Co bimetallic organic framework nanosheet assemblies for high-performance electrochemical energy storage

Ni/Co bimetallic organic framework nanosheet assemblies for high-performance electrochemical energy storage

Defect-Engineered 3D Cross-Network Co3O4–xNx Nanostructure for High-Performance Solid-State Asymmetric Supercapacitors

ZIF-67 Derived Co2VO4 Hollow Nanocubes for High Performance Asymmetric Supercapacitors

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Rational design and facile synthesis of two-dimensional hierarchical porous M3V2O8 (M = Co, Ni and Co–Ni) thin sheets assembled by ultrathin nanosheets as positive electrode materials for high-performance hybrid supercapacitors

Defect-Engineered 3D Cross-Network Co₃O_4–xN_x Nanostructure for High-Performance Solid-State Asymmetric Supercapacitors