Hexagonal-like NiCo2O4 nanostructure based high-performance supercapacitor electrodes

Venkatachalam, V.; Alsalme, Ali; Alghamdi, Aassem M.; Jayavel, R.

doi:10.1007/s11581-016-1868-x

Cited by 71 publications

(29 citation statements)

References 44 publications

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“…Its specific capacitance is ≈580.0 F g −1 at the current density of 1 A g −1 , much lower than that of Ni‐Co‐12. Figure S9 (Supporting Information) shows a comparison of the specific capacitance of Ni‐Co‐12 aerogel with those of other materials previously reported . Obviously, our results are much better than those reported by others.…”

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confidence: 51%

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Toward Aerogel Electrodes of Superior Rate Performance in Supercapacitors through Engineered Hollow Nanoparticles of NiCo₂O₄

Chen

Zhu

et al. 2017

Advanced Science

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A biomass‐templated pathway is developed for scalable synthesis of NiCo2O4@carbon aerogel electrodes for supercapacitors, where NiCo2O4 hollow nanoparticles with an average outer diameter of 30–40 nm are conjoined by graphitic carbon forming a 3D aerogel structure. This kind of NiCo2O4 aerogel structure shows large specific surface area (167.8 m2 g−1), high specific capacitance (903.2 F g−1 at a current density of 1 A g−1), outstanding rate performance (96.2% capacity retention from 1 to 10 A g−1), and excellent cycling stability (nearly without capacitance loss after 3000 cycles at 10 A g−1). The unique structure of the 3D hollow aerogel synergistically contributes to the high performance. For instance, the 3D interconnected porous structure of the aerogel is beneficial for electrolyte ion diffusion and for shortening the electron transport pathways, and thus can improve the rate performance. The conductive carbon joint greatly enhances the specific capacity, and the hollow structure prohibits the volume changes during the charge–discharge process to significantly improve the cycling stability. This work represents a giant step toward the preparation of high‐performance commercial supercapacitors.

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confidence: 51%

“…Figure S9 (Supporting Information) shows a comparison of the specific capacitance of Ni-Co-12 aerogel with those of other materials previously reported. [6,24,27,[31][32][33][34][35][36][37][38][39][40][41] Obviously, our results are much better than those reported by others.…”

mentioning

confidence: 52%

Toward Aerogel Electrodes of Superior Rate Performance in Supercapacitors through Engineered Hollow Nanoparticles of NiCo₂O₄

Chen

Zhu

et al. 2017

Advanced Science

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“…This strong peak is caused by the decomposition of the precursors to NiCo 2 O 4 NPs and removal of organic components, and thereafter, the TG curve becomes stable with negligible weight loss when it goes beyond 600 °C, which is a result of to the partial decomposition of NiCo 2 O 4 material to NiO. 34 Therefore, we chose to anneal the sample at 550 °C for 5 h. Now, the XRD pattern of this annealed sample is found to be best matched with the standard powder XRD pattern of cubic spinel NiCo 2 O 4 (JCPDS#73−1702, a = 8.1138 Å) (Figure 1a). 35 No additional peaks or phases are observed in the diffraction pattern, indicating that the synthesized NiCo 2 O 4 NPs are in a pure phase.…”

Section: ■ Introductionmentioning

confidence: 98%

Faster Ion Switching NiCo₂O₄ Nanoparticle Electrode-Based Supercapacitor Device with High Performances and Long Cycling Stability

Kumar

Chauhan

Yadav

et al. 2018

ACS Appl. Energy Mater.

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Although nanostructured NiCo 2 O 4 is the most appealing and studied electrode material by far as it is cheap, nontoxic, and efficient for supercapacitor application, it still lacks suitable device application comprising a wide voltage window and high operating current density, high specific energy and power, and absolute stability. Here, we report a successful application of our NiCo 2 O 4 nanoparticles (NPs) in a highly efficient electrochemical supercapacitor device, which is brought to reality because of the NPs' fast ion intercalation/extraction and fast reversible Faradaic surface reactions. The as-synthesized spinel NiCo 2 O 4 NPs are 65 nm in average diameter, have 59 m 2 /g of surface area, and 0.44 cm 3 /g of pore volume. Charge storage capability and reliability of the material as an active electrode have been demonstrated in terms of a conventional three-electrode method and in a coin-cell device. Specific capacity values of 150.56 to 41.66 mAh•g −1 (1084 to 300 Fg −1 in terms of capacitance) have been realized in the applied potential window (0.0−0.5 and 0.0−1.5 V) and in current densities of 2 to 10 Ag −1 , which are >98% stable in any of these given conditions up to 20 000 measured charge−discharge cycles. The NiCo 2 O 4 NP electrode exhibits a maximum energy density of 10.42 Wh kg −1 and a power density of 3750 Wkg −1 at 10 Ag −1 and makes itself an efficient electrode material for superior supercapacitor devices. These high performances are corroborated to the ultrafast intercalation reaction of electrolyte ions with nickel cobaltate at the electrode surface.

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“…For NCO, the peaks at 192 and 514 cm −1 correspond to F 2g whereas 461, 654, and 1031 cm −1 signify the presence of E g , A 1g , and 2LO modes for NiCo 2 O 4 . [ 64 ] In the case of CPNP@NC, CPNP@NC_NCO, and CPNP@NC_NCO/300, defect (D) and graphitic (G) band for carbon are observed. The ratio of the defect and graphitic band intensity ( I D / I G ) was evaluated to be 0.89, 1.04, and 0.91 for CPNP@NC, CPNP@NC_NCO, and CPNP@NC_NCO/300.…”

Section: Resultsmentioning

confidence: 99%

Design of Hierarchical Oxide‐Carbon Nanostructures for Trifunctional Electrocatalytic Applications

Devi

Bisen

Cao

et al. 2022

Adv Materials Inter

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The rational design of efficient trifunctional catalysts for oxygen evolution reaction (OER), oxygen reduction reaction (ORR), and hydrogen evolution reaction (HER) is of significant importance for metal–air batteries and electrolyzers. Herein, a hierarchical carbon architecture that comprises of 1D tubes and 2D sheets supported on Ni–Co oxide is synthesized. The 1D–2D carbon nanostructures further support homogeneously dispersed Co/Ni–Nx centers, NiCo and its oxide nanoparticles that are beneficial for ORR, HER, and OER, respectively. The hierarchical nanostructures offer highly exposed surface that enables the maximum utility of active sites for different reactions and also provide a single platform that can be used as OER–ORR and OER‐HER bifunctional catalyst for metal– air batteries and electrolyzers, respectively. The catalyst displays a low ΔE (EJ(OER) = 10 − E½(ORR)) of 0.846 V for bifunctional OER–ORR and low potential of 1.54 V at 10 mA cm−2 for overall water splitting with appreciable durability for 40 h. Overall, the nanostructures exhibit remarkable activity and are durable for OER, ORR, and HER. Moreover, the study offers a pathway to expand the functionality of the non‐noble electrocatalyst and simultaneously offers a platform to prove that preferential active sites exist for different reactions.

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Hexagonal-like NiCo2O4 nanostructure based high-performance supercapacitor electrodes

Cited by 71 publications

References 44 publications

Toward Aerogel Electrodes of Superior Rate Performance in Supercapacitors through Engineered Hollow Nanoparticles of NiCo₂O₄

Toward Aerogel Electrodes of Superior Rate Performance in Supercapacitors through Engineered Hollow Nanoparticles of NiCo₂O₄

Faster Ion Switching NiCo₂O₄ Nanoparticle Electrode-Based Supercapacitor Device with High Performances and Long Cycling Stability

Design of Hierarchical Oxide‐Carbon Nanostructures for Trifunctional Electrocatalytic Applications

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Hexagonal-like NiCo2O4 nanostructure based high-performance supercapacitor electrodes

Cited by 71 publications

References 44 publications

Toward Aerogel Electrodes of Superior Rate Performance in Supercapacitors through Engineered Hollow Nanoparticles of NiCo2O4

Toward Aerogel Electrodes of Superior Rate Performance in Supercapacitors through Engineered Hollow Nanoparticles of NiCo2O4

Faster Ion Switching NiCo2O4 Nanoparticle Electrode-Based Supercapacitor Device with High Performances and Long Cycling Stability

Design of Hierarchical Oxide‐Carbon Nanostructures for Trifunctional Electrocatalytic Applications

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Toward Aerogel Electrodes of Superior Rate Performance in Supercapacitors through Engineered Hollow Nanoparticles of NiCo₂O₄

Toward Aerogel Electrodes of Superior Rate Performance in Supercapacitors through Engineered Hollow Nanoparticles of NiCo₂O₄

Faster Ion Switching NiCo₂O₄ Nanoparticle Electrode-Based Supercapacitor Device with High Performances and Long Cycling Stability