NiCo<sub>2</sub>O<sub>4</sub>-based materials for electrochemical supercapacitors

Wu, Zhibin; Zhu, Yirong; Ji, Xiaobo

doi:10.1039/c4ta02390k

Cited by 430 publications

(218 citation statements)

References 105 publications

Supporting

Mentioning

212

Contrasting

Unclassified

Order By: Relevance

“…As a typical electrode material for pseudocapacitors, NiCo 2 O 4 has been widely investigated in the past few years due to its ultrahigh specific capacitance (over 2000 F g −1 ). [45][46][47][48] Herein, we report the preparation of thin 2D NiCo 2 O 4 nanosheet-coated 3DGN, referred to as NiCo 2 O 4 NS/3DGN, for high-performance supercapacitor application. This novel NiCo 2 O 4 NS/3DGN hybrid exhibits excellent electrochemical performance, such as ultra-high specific capacitance and excellent rate capability.…”

mentioning

confidence: 99%

Two-dimensional NiCo₂O₄nanosheet-coated three-dimensional graphene networks for high-rate, long-cycle-life supercapacitors

et al. 2015

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 99%

Two-dimensional NiCo₂O₄nanosheet-coated three-dimensional graphene networks for high-rate, long-cycle-life supercapacitors

et al. 2015

View full text Add to dashboard Cite

show abstract

“…[12][13][14][15][16][17][18] Formally, it is an inverse spinel with Ni 2+ ions occupying the octahedral site (O h ) and Co 3+ ions distributed over the O h and tetrahedral site (T d ) but the real cation distribution may significantly differ from this, depending on the preparation method. 19 The conduction mechanism is still a subject of discussion and a large variation in the resistivity values is reported in literature.…”

Section: Introductionmentioning

confidence: 99%

Atomic layer deposition of nickel–cobalt spinel thin films

2017

View full text Add to dashboard Cite

We report the atomic layer deposition (ALD) of high-quality crystalline thin films of the spinel-oxide system (Co 1−x Ni x ) 3 O 4 . These spinel oxides are ferrimagnetic p-type semiconductors promising for several applications ranging from photovoltaics and spintronics to thermoelectrics. The spinel phase is obtained for Ni contents exceeding thex = 0.33 limit for bulk samples. It is observed that the electrical resistivity decreases continuously with x while the magnetic moment increases up to x = 0.5. This is in contrast to bulk samples where a decrease of resistivity is not observed for x > 0.33 due to the formation of a rock-salt phase. From UV-VIS-NIR absorption measurements, a change from distinct absorption edges for the parent oxide Co 3 O 4 to a continuous absorption band ranging deep into the near infrared for 0 < x ≤ 0.5 was observed. The conformal deposition of dense films on high-aspect-ratio patterns is demonstrated.

show abstract

“…20,21 In addition, for MCo 2 O 4 , it is assumed that both the metal cations take part in the redox reactions that will again contribute to additional specific capacitance. 22 Furthermore, there is a need to improve capacitive performance of the MCo 2 O 4 electrode by substituting metal cations for Co. In that prospect, FeCo 2 O 4 can provide excellent electrochemical characteristics than the corresponding single components because it undergoes redox reactions from both the cations.…”

Section: Introductionmentioning

confidence: 99%

Direct growth of FeCo2O4 nanowire arrays on flexible stainless steel mesh for high-performance asymmetric supercapacitor

et al. 2017

View full text Add to dashboard Cite

Currently, one-dimensional nanostructured binary metal oxides attract a great attention in supercapacitors (SCs) application due to their rapid charge transportation. In this respect, different nanostructures of FeCo 2 O 4 are designed by simply tuning the reaction temperature in hydrothermal synthesis. These nanostructures are directly grown on flexible stainless steel mesh and further applied as binder-free electrodes for SCs. The systematic study is carried out to confirm the relation between surface characteristics and electrochemical properties of FeCo 2 O 4 thin film. Among different nanostructures, FeCo 2 O 4 nanowire arrays exhibit hierarchical mesoporous structure and demonstrate good surface properties including high surface area and appropriate pore volume. As a consequence, relatively high specific capacitance of 1963 F g − 1 is obtained for the FeCo 2 O 4 nanowire electrode. Further, asymmetric SC is fabricated using nanowired-FeCo 2 O 4 and nanoparticulated-MnO 2 thin films as negative and positive electrodes with neutral Na 2 SO 4 electrolyte. Impressively, the MnO 2 //FeCo 2 O 4 cell could be successfully cycled in a wide voltage window of 2.0 V, which can achieve a specific capacitance of 218 F g − 1 and energy density of 43 Wh kg − 1 . In addition, the SCs exhibit improved capacitance with cycling, which is attributed to opening of micro-pores occurred by frequent ion transport. NPG Asia Materials (2017) 9, e419; doi:10.1038/am.2017.145; published online 18 August 2017 INTRODUCTIONResearchers and engineers have always focused on the development of efficient methods for energy production to improve the quality of human lives. 1,2 Fossil fuels are the major energy sources that are being used in the world today to fulfill the energy demand. However, the excessive consumption of fossil fuels leads to air pollution due to release of toxic gases such as CO 2 , CO, NO 2 and SO 2 . Consequently, obtaining energy from clean and safe renewable energy resources (like solar, wind and ocean energy) to reduce the air pollution is getting important. However, the energy obtained from renewable energy resources is uncertain and inconsistent as it depends upon environmental conditions. To overcome the difficulties, energy storage technology for storing the renewable energy should be developed. 3,4 Since the last decade, the industry and research institutes have made significant effort to develop inexpensive and proficient energy storage devices. 5 Presently, Li-ion batteries (LIBs) and supercapacitors (SCs) are considered as the promising energy storage devices because of their excellent electrochemical capabilities. 6 Especially, SCs have garnered more attention than LIBs due to their outstanding electrochemical

show abstract

NiCo₂O₄-based materials for electrochemical supercapacitors

Abstract: NiCo2O4-based materials have become a new class of energy storage materials for electrochemical supercapacitors, which manifest remarkable electrochemical performances.

Cited by 430 publications

References 105 publications

Two-dimensional NiCo₂O₄nanosheet-coated three-dimensional graphene networks for high-rate, long-cycle-life supercapacitors

Two-dimensional NiCo₂O₄nanosheet-coated three-dimensional graphene networks for high-rate, long-cycle-life supercapacitors

Atomic layer deposition of nickel–cobalt spinel thin films

Direct growth of FeCo2O4 nanowire arrays on flexible stainless steel mesh for high-performance asymmetric supercapacitor

Contact Info

Product

Resources

About

NiCo2O4-based materials for electrochemical supercapacitors

Abstract: NiCo2O4-based materials have become a new class of energy storage materials for electrochemical supercapacitors, which manifest remarkable electrochemical performances.

Cited by 430 publications

References 105 publications

Two-dimensional NiCo2O4nanosheet-coated three-dimensional graphene networks for high-rate, long-cycle-life supercapacitors

Two-dimensional NiCo2O4nanosheet-coated three-dimensional graphene networks for high-rate, long-cycle-life supercapacitors

Atomic layer deposition of nickel–cobalt spinel thin films

Direct growth of FeCo2O4 nanowire arrays on flexible stainless steel mesh for high-performance asymmetric supercapacitor

Contact Info

Product

Resources

About

NiCo₂O₄-based materials for electrochemical supercapacitors

Two-dimensional NiCo₂O₄nanosheet-coated three-dimensional graphene networks for high-rate, long-cycle-life supercapacitors

Two-dimensional NiCo₂O₄nanosheet-coated three-dimensional graphene networks for high-rate, long-cycle-life supercapacitors