CoO/ZnO nanoclusters immobilized on N-doped 3 D reduced graphene oxide for enhancing lithium storage capacity

Yan, Zhaoqian; Sun, Zhihao; Yue, Kaicheng; Li, Anran; Qian, Lei

doi:10.1016/j.jallcom.2020.155443

Cited by 33 publications

(24 citation statements)

References 59 publications

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“…For the Zn 2p spectrum (Figure 6C. ), the peaks at 1044.9 and 1021.8 eV can be attributed to Zn 2p 3/2 and Zn 2p 1/2 [26] . Signals of oxygen containing groups (−OH) and O−Co were determined at 531.7 and 530.6 eV (Figure 6D.…”

Section: Resultsmentioning

confidence: 95%

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Hollow Concave Zinc‐Doped Co₃O₄ Nanosheets/Carbon Composites as Ultrahigh Capacity Anode Materials for Lithium‐Ion Batteries

2021

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Composition‐structure strategy is an effective method to improve the electrochemical performance of lithium‐ion batteries (LIBs). Ideal active materials combined with unique structure can lead to potential candidates for next‐generation LIB anode materials. In this research, we designed a hollow concave Zn‐doped Co3O4 nanosheets/carbon composites as active electrodes for LIBs. The hollow concave structure could shorten the path length of Li+ and electron transfer. The interconnected Co3O4 nanosheets could construct a conductive network and enhance the composites’ conductivity. Moreover, defects produced by Zn doping in the Co3O4 phase improves the electronic structure of Co3O4, endowing superior electrochemical performances for the doped Co3O4‐based composites. As expected, the optimized hollow concave Zn‐doped Co3O4/C composites exhibited high specific capacities with stable cyclability (750 mA h g−1 at 500 mA g−1 after 300 cycles) and excellent rate performances (723.5 mA h g−1 at 3.0 A g−1).

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Section: Resultsmentioning

confidence: 95%

“…), the peaks at 1044.9 and 1021.8 eV can be attributed to Zn 2p 3/2 and Zn 2p 1/2 . [26] Signals of oxygen containing groups (À OH) and OÀ Co were determined at 531.7 and 530.6 eV ( Figure 6D.), indicating the pure components of HC ZnÀ Co NSs/C hybrids. Peaks located at 284.5 and 285.1 eV ( Figure 6E.)…”

Section: Resultsmentioning

confidence: 99%

Hollow Concave Zinc‐Doped Co₃O₄ Nanosheets/Carbon Composites as Ultrahigh Capacity Anode Materials for Lithium‐Ion Batteries

2021

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“…Herein, the carbon-coated ZnCo2O4 nanowire arrays grown on the Ni foam are directly evaluated as the anode. with Li can be clarified as follows [35,36]:…”

Section: Resultsmentioning

confidence: 99%

“…Figure 4 reveals the first three cyclic voltammogram (CV) curves of the carbon-coated ZnCo2O4 nanowire electrodes in the potential range of 0.01-3.0 V at a scan rate of 0.1 mV•s −1 . The electrochemical reactions of ZnCo2O4 with Li can be clarified as follows [35,36]: It can be clearly seen that the curve of the first cathodic scan is different from the subsequent ones. In the first circle, the two reduction peaks located at 0.87 V and 0.62 V are corresponded to the reduction process of ZnCo 2 O 4 to Zn and Co accompanying the formation of the SEI layer.…”

Section: Resultsmentioning

confidence: 99%

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The Carbon-Coated ZnCo2O4 Nanowire Arrays Pyrolyzed from PVA for Enhancing Lithium Storage Capacity

Zhao

Shi

et al. 2020

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In this paper, ZnCo2O4 nanowire arrays with a uniform carbon coating were introduced when polyvinyl alcohol (PVA) served as the carbon source. The coating process was completed by a facile bath method in PVA aqueous solution and subsequent pyrolyzation. The PVA-derived carbon-coated ZnCo2O4 nanowire array composites can be used directly as the binder-free and self-supported anode materials for lithium-ion batteries. In the carbon-coated ZnCo2O4 composites, the carbon layer carbonized from PVA can accelerate the electron transfer and accommodate the volume swing during the cycling process. The lithium storage properties of the carbon-coated ZnCo2O4 composites are investigated. It is believed that the novel carbon-coating method is universal and can be applied to other nanoarray materials.

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A simple one-pot method for growing metal (Co, Ni, Cu) oxide naoparticles on N-doped reduced graphene oxide and their application in lithium-ion storage

Li,

Duan,

et al. 2023

J Sol-Gel Sci Technol

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Nanomaterials have been used as the electrodes of lithium-ion batteries during the past years. Designing nanomaterials with a simple method is signi cant for saving the cost of lithium-ion batteries that will be applied in electric vehicles and portable electronic devices. In this study, a simple one-pot strategy was proposed to grow MO x (M = Co, Ni, Cu) metal oxide nanoparticles on N-doped reduced graphene oxide (rGO) sheets. The MO x /N-doped rGO composites were subsequently studied as the anodes of lithium-ion batteries. Results demonstrated that the one-pot method effectively prevents the aggregation of nanoparticles and the restacking of graphene sheets, which is important to improve the electrochemical performance of composites. Electrochemical measurements of the three composites as anode materials exhibited the high reversible capacitance, rate capability, and cyclic stability. The proposed simple one-pot method may provide researchers and industry with a new strategy to manufacture cost-effective graphene-based nanomaterials for high performance anodes of lithium-ion batteries. HighlightsA simple one-pot strategy was proposed to grow MOx (M = Co, Ni, Cu) metal oxide nanoparticles on N-doped reduced graphene oxide (rGO) sheets.Urea was used as both the crosslinking agent and nitrogen source during the one-pot synthesis.Electrochemical performance of three composite were investigated as the anode materials of lithiumion batteries.Anodes exhibited the high reversible capacity, excellent rate performance, and ideal cycling performance.

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CoO/ZnO nanoclusters immobilized on N-doped 3 D reduced graphene oxide for enhancing lithium storage capacity

Cited by 33 publications

References 59 publications

Hollow Concave Zinc‐Doped Co₃O₄ Nanosheets/Carbon Composites as Ultrahigh Capacity Anode Materials for Lithium‐Ion Batteries

Hollow Concave Zinc‐Doped Co₃O₄ Nanosheets/Carbon Composites as Ultrahigh Capacity Anode Materials for Lithium‐Ion Batteries

The Carbon-Coated ZnCo2O4 Nanowire Arrays Pyrolyzed from PVA for Enhancing Lithium Storage Capacity

A simple one-pot method for growing metal (Co, Ni, Cu) oxide naoparticles on N-doped reduced graphene oxide and their application in lithium-ion storage

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CoO/ZnO nanoclusters immobilized on N-doped 3 D reduced graphene oxide for enhancing lithium storage capacity

Cited by 33 publications

References 59 publications

Hollow Concave Zinc‐Doped Co3O4 Nanosheets/Carbon Composites as Ultrahigh Capacity Anode Materials for Lithium‐Ion Batteries

Hollow Concave Zinc‐Doped Co3O4 Nanosheets/Carbon Composites as Ultrahigh Capacity Anode Materials for Lithium‐Ion Batteries

The Carbon-Coated ZnCo2O4 Nanowire Arrays Pyrolyzed from PVA for Enhancing Lithium Storage Capacity

A simple one-pot method for growing metal (Co, Ni, Cu) oxide naoparticles on N-doped reduced graphene oxide and their application in lithium-ion storage

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Hollow Concave Zinc‐Doped Co₃O₄ Nanosheets/Carbon Composites as Ultrahigh Capacity Anode Materials for Lithium‐Ion Batteries

Hollow Concave Zinc‐Doped Co₃O₄ Nanosheets/Carbon Composites as Ultrahigh Capacity Anode Materials for Lithium‐Ion Batteries