Morphological evolution of hollow NiCo<sub>2</sub>O<sub>4</sub>microspheres and their high pseudocapacitance contribution for Li/Na-ion battery anodes

Dong, Kangze; Wang, Zhiyuan; Wang, Dan; Sun, Meizhu; Luo, Shaohua; Liu, Yanguo

doi:10.1039/c8nj03965h

Cited by 18 publications

(14 citation statements)

References 39 publications

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“…Remarkably, the capacities of both electrodes exhibit an increased process after short decay at the initial cycles. The phenomenon about the sudden attenuation and increase in capacity also appears in literature on vanadium oxides anode materials . The improved cycling performance may be attributed to the fact that doped nitrogen may cause more defects in the structure, thereby increasing the active sites and promoting the storage capability of Li …”

Section: Resultsmentioning

confidence: 66%

Plant Oil–Inspired 3D Flower‐Like Zn₃V₃O₈ Nanospheres Coupled with N‐Doped Carbon as Anode Material for Li‐/Na‐Ion Batteries

Cheng

Shi

et al. 2019

Energy Tech

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Plant oil–inspired 3D flower‐like Zn3V3O8 nanospheres coupled with nitrogen doped (N‐doped) carbon synthesized via the microemulsion/calcination strategy are used as anodes for lithium‐/sodium‐ion batteries (LIBs/SIBs). The synergistic interaction between the unique 3D flower‐like structure and the existence of N‐doped carbon can provide enough space to buffer volume expansion during the Li+/Na+ intake/outlet process and enhance conductivity, respectively. Thus, the material delivers progressive electrochemical performance. Specifically, the Zn3V3O8 nanospheres exhibit a reversible specific capacity of 1140.6 mAh g−1 after 200 cycles for LIBs and 113.0 mAh g−1 after 400 cycles for SIBs at a current density of 200 mA g−1. Furthermore, the Zn3V3O8 nanospheres electrode owns rate capability for LIBs such as 933.8, 847.9, 780.8, and 664.1 mAh g−1 at elevated current densities of 200, 400, 800, and 1600 mAh g−1, respectively. In addition, it delivers reversible capacities of 207.5, 119.2, 74.1, and 42.7 mAh g−1 at 100, 200, 500, 1000, and 2000 mA g−1 for SIBs, respectively.

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Section: Resultsmentioning

confidence: 66%

Plant Oil–Inspired 3D Flower‐Like Zn₃V₃O₈ Nanospheres Coupled with N‐Doped Carbon as Anode Material for Li‐/Na‐Ion Batteries

Cheng

Shi

et al. 2019

Energy Tech

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“…A higher diffusive contribution of 66% is achieved at 0.1 mVs −1 , which decreases at higher scan rates due to more surface-controlled reactions. An increasing trend of capacitive behavior with 34%, 42% and 46% contribution [42,50] are observed at 0.1, 0.2 and 0.3 mVs −1 scan rates. These results are presented in the percentage ratio versus the scan rate in Fig.…”

Section: Resultsmentioning

confidence: 86%

“…5(b), to evaluate the b values for oxidative and reductive peaks, which are found to be around 0.5 and 0.8, respectively. These values suggest for a combination of both diffusive (anodic regime) and pseudo-capacitive (cathodic regime) controlled Na + insertion/de-insertion into the NCPP/NC composite electrode [33,34,42,50].…”

Section: Resultsmentioning

confidence: 90%

“…Moreover, the reversible peaks appear at 0.01 V in cathode region and 0.09 V in anodic region due to the intercalation and deintercalation of Na ions in carbon matrix [39,41]. From the second cycle onwards, the reversible peaks appear at around 0.9 V and 1.9 V due to the sodiation/desodiation process along with the electrochemical reduction/oxidation of Co in the active material [42][43][44][45] of NCPP electrodes. Similar redox couples are observed in the CV curves of the pristine NCPP material, which suggests for the same electrochemical reactions.…”

Section: Resultsmentioning

confidence: 99%

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Na$_{4}$Co$_{3}$(PO$_{4}$)$_{2}$P$_{2}$O$_{7}$/NC composite as a negative electrode for sodium-ion batteries

Dwivedi¹,

Sapra²,

Pati³

et al. 2021

Preprint

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In recent years, the mixed phosphates based polyanionic electrode materials have attracted great attention in sodium-ion batteries due to their structural stability during cycling and open framework for ion diffusion. Here, we report the electrochemical performance of Na4Co3(PO4)2P2O7/nitrogen doped carbon (NCPP/NC) composite as a negative electrode (anode) for sodium ion batteries in the working potential range of 0.01-3.0 V. It delivers a reversible discharge capacity of 250 mAhg −1 at 0.5 C current rate, which corresponds to the insertion/extraction of four sodium ions. The rate capability study indicates the reversible mechanism and highly stable capacity (61 mAhg −1 ) even at high rate up to 5 C as compared to pristine NCPP. The incorporation of the N doped carbon spheres in the composite is expected to enhance the electronic/ionic conductivity, which plays an important role in improving the performance and stability up to 400 cycles at 1 C rate. Intriguingly, the analysis of cyclic voltammetry data measured at different scan rates confirm the capacitive/diffusive controlled mechanism and the extracted diffusion coefficient is found to be around 10 −10 cm 2 s −1 . Our results demonstrate that the NCPP/NC composite is also a potential candidate as anode in sodium-ion batteries due to its three dimensional framework, cost effectiveness, enhanced specific capacity as well as further possibility of improving the stability.

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“…The pore size distribution is calculated by Barrett-Joyner-Halenda (BJH) theory, and the specific surface area is determined by the Brunauer-Emmett-Teller (BET) method. According to our previous research results, 41 the four samples were tested by BET, as shown in S2. The larger specific surface area and abundant pores improve the electrochemical performance of the electrode, which could promote the diffusion of electrolyte to the electrode and the volume expansion of the buffer material during charging and discharging.…”

Section: Influence Hydrothermal Time On the Microscopic Morphology And Chemical Composition Of Ni 1àx Co 2+x Omentioning

confidence: 99%

Facile hydrothermal synthesis of urchin‐like NiCo ₂ O ₄ as advanced electrochemical pseudocapacitor materials

et al. 2021

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The urchin-like NiCo 2 O 4 material was prepared by a one-step hydrothermal method. The optimal synthetic conditions were systematically investigated by an orthogonal test method and single factor of hydrothermal time to evaluate the influence of sample morphology and electrochemical performance. The synthesis conditions for preparing NiCo 2 O 4 with different morphologies were systematically studied. In the single factor experiment, when the hydrothermal time is 6, 12, 16, and 24 hours, the corresponding morphologies are urchin-like (NCO-U), flower-like (NCO-F), sheet-like (NCO-S), and block-like (NCO-B), respectively. The element content of the prepared materials under different synthesis conditions was tested by an inductive-coupled plasma emission spectrometer, and an interesting phenomenon was found. As the reaction time

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Morphological evolution of hollow NiCo₂O₄microspheres and their high pseudocapacitance contribution for Li/Na-ion battery anodes

Abstract: Hollow urchin-like NiCo2O4 microspheres (∼3 μm) with a large specific surface area (158.57 m2 g−1) have been synthesized by a facile template-free hydrothermal method and a morphology evolution mechanism of “bundles-solid spheres-hollow urchin-like microspheres” was proposed.

Cited by 18 publications

References 39 publications

Plant Oil–Inspired 3D Flower‐Like Zn₃V₃O₈ Nanospheres Coupled with N‐Doped Carbon as Anode Material for Li‐/Na‐Ion Batteries

Plant Oil–Inspired 3D Flower‐Like Zn₃V₃O₈ Nanospheres Coupled with N‐Doped Carbon as Anode Material for Li‐/Na‐Ion Batteries

Na$_{4}$Co$_{3}$(PO$_{4}$)$_{2}$P$_{2}$O$_{7}$/NC composite as a negative electrode for sodium-ion batteries

Facile hydrothermal synthesis of urchin‐like NiCo ₂ O ₄ as advanced electrochemical pseudocapacitor materials

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Morphological evolution of hollow NiCo2O4microspheres and their high pseudocapacitance contribution for Li/Na-ion battery anodes

Abstract: Hollow urchin-like NiCo2O4 microspheres (∼3 μm) with a large specific surface area (158.57 m2 g−1) have been synthesized by a facile template-free hydrothermal method and a morphology evolution mechanism of “bundles-solid spheres-hollow urchin-like microspheres” was proposed.

Cited by 18 publications

References 39 publications

Plant Oil–Inspired 3D Flower‐Like Zn3V3O8 Nanospheres Coupled with N‐Doped Carbon as Anode Material for Li‐/Na‐Ion Batteries

Plant Oil–Inspired 3D Flower‐Like Zn3V3O8 Nanospheres Coupled with N‐Doped Carbon as Anode Material for Li‐/Na‐Ion Batteries

Na$_{4}$Co$_{3}$(PO$_{4}$)$_{2}$P$_{2}$O$_{7}$/NC composite as a negative electrode for sodium-ion batteries

Facile hydrothermal synthesis of urchin‐like NiCo 2 O 4 as advanced electrochemical pseudocapacitor materials

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Morphological evolution of hollow NiCo₂O₄microspheres and their high pseudocapacitance contribution for Li/Na-ion battery anodes

Plant Oil–Inspired 3D Flower‐Like Zn₃V₃O₈ Nanospheres Coupled with N‐Doped Carbon as Anode Material for Li‐/Na‐Ion Batteries

Plant Oil–Inspired 3D Flower‐Like Zn₃V₃O₈ Nanospheres Coupled with N‐Doped Carbon as Anode Material for Li‐/Na‐Ion Batteries

Facile hydrothermal synthesis of urchin‐like NiCo ₂ O ₄ as advanced electrochemical pseudocapacitor materials