Honeycombed NiCo2O4 nanosheets grown on the sponge of a carbon nanotube/graphene prepared by the flame burning method with an advanced performance as a supercapacitor

Jin, Fengqiao; Tong, Hao; Lu, Liang; Meng, Qing; Yue, Shihong; Ding, Bing; Zhang, Xiaogang

doi:10.1016/j.jallcom.2019.02.011

Cited by 16 publications

(7 citation statements)

References 53 publications

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“…The prepared CoS 2 / NSC-CNT-p electrode has good electrochemical performance, including high specific capacitance (635.8 F/g, 1 A/g), good rate performance (544.2 F/g, 10 A/g), and long-term cycling stability (88.0% after 2000 cycles). In addition, when the power density is 0.71 kW/kg, the energy density of the CoS 2 /NSC-CNT-p/AC asymmetric supercapacitor reaches 14.1 Wh/kg, and its capacitance remains at 92.2% after 2000 cycles within the potential range of 0-1.4 V. Jin et al 82 successfully prepared a 3D elastic sponge composed of single-walled carbon nanotubes/graphene (SWNT-RGO-S) in an open environment within 20 s using an ultra-fast and simple flame combustion method, and they further deposited layered NiCo 2 O 4 on the SWNT-RGO-S scaffold through hydrothermal treatment and annealing treatment. The compressed NiCo 2 O 4 /SWNT-RGO-S electrode has a high weight capacitance of 2050 F/g and a volume capacitance of 1200 F/cm 3 and has high cyclic stability after 6800 cycles at a current density of 20 A/g with a capacitance retention rate of 115.3%.…”

Section: Cncsmentioning

confidence: 99%

“…Metal compounds, such as CO‐Co 3 O 4 , 79 MnO 2 , 80 CoS 2 , 81 NiCo 2 O 4 , 82 and NiO, have been widely used in the field of supercapacitors. Metal compounds as electrode materials have high specific capacitance, but because of the poor conductivity of metal compounds, the cycle stability and rate capability are poor.…”

Section: Binary Complexesmentioning

confidence: 99%

“…Rapid microwave process in 2 min 980.5 F/g at 1 A/g 82% after 9000 cycles 25.61 Wh/kg (810 W/kg) [Composite of metal organic framework (MOFs) materials and carbon materials Ni-CO LDH/GNR Solvent thermal method 1765 F/g 80% after 2000 cycles 749 W/kg (25.4 W/kg) Composite of carbon material and conductive polymer PANI-SRPG In situ oxidation polymerization 939.96 F/g at 1 A/g 98.46% after 5000 cycles 145 Wh/kg (17578.13 W/kg) [68] DMC/PANI In-situ polymerization 985 F/g at 0.5 A/g 82% after 5000 cycles 32 Wh/kg (125 W/kg) g at 0.2 A/g 97% after 3000 cycles 93.73 Wh/kg (850 W/kg) [Composite of carbon materials and metal compounds Metal compounds, such as CO-Co 3 O 4 , 79 MnO 2 , 80 CoS 2 , 81 NiCo 2 O 4 ,82 and NiO, have been widely used in the field of supercapacitors. Metal compounds as electrode materials have high specific capacitance, but because of the poor conductivity of metal compounds, the cycle stability and rate capability are poor.…”

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confidence: 99%

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Carbon nanomaterials and their composites for supercapacitors

2022

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As a type of energy storage device between traditional capacitors and batteries, the supercapacitor has the advantages of energy saving and environmental protection, high power density, fast charging and discharging speed, long cycle life, and so forth. One of the key factors affecting the performance of supercapacitor is the electrode material. Carbon materials, such as carbon nanotube, graphene, activated carbon, and carbon nanocage, are most widely concerned in the application of supercapacitors. The synergistic effect of composites can often obtain excellent results, which is one of the common strategies to increase the electrochemical performance of supercapacitors. To further improve the performance of binary composites, it is a relatively simple method to increase the components as the "bridge" between the two materials to form the ternary composites. The review mainly introduces the current research progress of supercapacitors with pure carbon nanomaterials and multistage carbon nanostructures (composites) as electrodes. The characteristics and application directions of different pure carbon nanomaterials are introduced in detail. Different ways of multilevel structure (material) composite have their own effects on the development of high-performance supercapacitors. We also highlight the recent advances related to these fields and provide our insight into high-energy supercapacitors.

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Section: Cncsmentioning

confidence: 99%

Section: Binary Complexesmentioning

confidence: 99%

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confidence: 99%

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Carbon nanomaterials and their composites for supercapacitors

2022

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“…Therefore, the hydrothermal treatment of ammonia is beneficial to generate more active sites, resulting in accelerating the ion diffusion rate in the electrolyte and obtaining higher charge storage capacity and rate capability. 27 To gain deep insight into the structural changes of MnO 2 before and after doping nitrogen, it is essential to determine the internal structure of MnO 2 via high-magnification transmission electron microscopy (HR-TEM). The surface morphology obtained by SEM in Figure 3 displays the images of HR-TEM for MnO 2 and N−MnO 2 scraped off the substrate.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Reaction Kinetics of N–MnO₂ Nanosheets with Oxygen Vacancies via Mild NH₃·H₂O Bath Treatment for Advanced Aqueous Supercapacitors

Gong

Tong

Xiao

et al. 2022

ACS Appl. Energy Mater.

Self Cite

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Suffering from the sluggish kinetics resulting from the inferior conductivity of manganese dioxide (MnO 2 ), many endeavors have been devoted to promoting the electrochemical performance of MnO 2 . Doping heteroatoms into host materials has emerged as an effective strategy to generate lattice vacancies for fast diffusion of ions/electrons in MnO 2 -based materials for supercapacitors (SCs). To eliminate the use of dangerous solvents and the severe reaction conditions used in previous reports, in this work, we first obtain N-doped MnO 2 (N−MnO 2 ) nanosheets with abundant oxygen vacancies simultaneously by a mild hydrothermal reaction. Thus, thanks to the mutual effect of N doping and oxygen vacancies, the capability of ion diffusion for N−MnO 2 /NGCF (NGCF represents N-doped single-wall carbon nanotube cross-linked graphene composite film) has increased an order of magnitude (1.68 × 10 −11 cm 2 s −1 compared with 8.42 × 10 −13 cm 2 s −1 for MnO 2 /NGCF) and shows superior rate capability, where at 30 A g −1 a capacitance retention of 51.7% remains, i.e., 185.1 F g −1 , compared with 44% at 15 A g −1 for MnO 2 /NGCF. In addition, we apply ex situ X-ray diffraction (XRD) and scanning electron microscopy (SEM) to verify the fact that nitrogen doping with abundant vacancies will benefit reversible intercalation/stripping of Na + by triggering the phase change from MnO 2 to MnOOH for N−MnO 2 compared with MnO 2 with adsorption/desorption during the charge−discharge process, which has never been discussed before. Excitingly, an asymmetric supercapacitor (ASC), fabricated by N−MnO 2 /NGCF as a cathode and MnO 2 /NGCF as an anode, delivers a maximum energy and power density of 75.3 Wh kg −1 and 18.1 × 10 3 W kg −1 , respectively. This work provides an approach to design self-standing advanced N-doped MnO 2 and a deeper insight into the mode of reaction of MnO 2 in neutral electrolyte for aqueous SCs.

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“…The composite was applied as a free-standing electrode and showed a high-specific capacitance of 540 F g −1 at 1 A g −1 . A 3D carbon sponge composed of single-walled CNTs/graphene was prepared by a dipping and burning method, and NiCo 2 O 4 nanosheets were deposited on the carbon scaffolds by the hydrothermal method [80]. The hybrid could act as self-standing and binder-free electrodes and exhibited a high gravimetric capacitance of 2050 F g −1 at 2 A g −1 .…”

Section: Film Electrodesmentioning

confidence: 99%

Recent Research of NiCo2O4/Carbon Composites for Supercapacitors

Yang

Cheng

et al. 2022

Surfaces

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Supercapacitors have played an important role in electrochemical energy storage. Recently, researchers have found many effective methods to improve electrode materials with more robust performances through the increasing volume of scientific publications in this field. Though nickel cobaltite (NiCo2O4), as a promising electrode material, has substantially demonstrated potential properties for supercapacitors, its composites usually show much better performances than the pristine NiCo2O4. The combination of carbon-based materials and NiCo2O4 has been implemented recently due to the dual mechanisms for energy storage and the unique advantages of carbon materials. In this paper, we review the recent research on the hybrids of NiCo2O4 and carbon nanomaterials for supercapacitors. Typically, we focused on the reports related to the composites containing graphene (or reduced graphene oxide), carbon nanotubes, and amorphous carbon, as well as the major synthesis routes and electrochemical performances. Finally, the prospect for the future work is also discussed.

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Honeycombed NiCo2O4 nanosheets grown on the sponge of a carbon nanotube/graphene prepared by the flame burning method with an advanced performance as a supercapacitor

Cited by 16 publications

References 53 publications

Carbon nanomaterials and their composites for supercapacitors

Carbon nanomaterials and their composites for supercapacitors

Enhanced Reaction Kinetics of N–MnO₂ Nanosheets with Oxygen Vacancies via Mild NH₃·H₂O Bath Treatment for Advanced Aqueous Supercapacitors

Recent Research of NiCo2O4/Carbon Composites for Supercapacitors

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Honeycombed NiCo2O4 nanosheets grown on the sponge of a carbon nanotube/graphene prepared by the flame burning method with an advanced performance as a supercapacitor

Cited by 16 publications

References 53 publications

Carbon nanomaterials and their composites for supercapacitors

Carbon nanomaterials and their composites for supercapacitors

Enhanced Reaction Kinetics of N–MnO2 Nanosheets with Oxygen Vacancies via Mild NH3·H2O Bath Treatment for Advanced Aqueous Supercapacitors

Recent Research of NiCo2O4/Carbon Composites for Supercapacitors

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Enhanced Reaction Kinetics of N–MnO₂ Nanosheets with Oxygen Vacancies via Mild NH₃·H₂O Bath Treatment for Advanced Aqueous Supercapacitors