Hierarchical CoO microflower film with excellent electrochemical lithium/sodium storage performance

Chang, Ling; Wang, Kai; Huang, Lican; He, Zhishun; Zhu, Shasha; Chen, Miaomiao; Shao, Haibo; Wang, Jianming

doi:10.1039/c7ta05027e

Cited by 77 publications

(38 citation statements)

References 66 publications

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“…[32,56] While the capacity increase of the 3DGA electrode may be due to its very large number of edges and defects, which facilitates the formation of more Li + storage active sites. [56,57] Figure 7d exhibits the rate capabilities of the 3DGA and comparative GP electrodes. The 3DGA electrode delivers average reversible capacities of 714.7, 505.6, 393.5, 306.4 and 237.1 mAh g À 1 at the rates of 100, 200, 400, 800 and 1600 mA g À 1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Both Nyquist plots are composed of a capacitive loop and a sloped line. The former is induced by the charge transfer (R ct ) and the interface capacitance (CPE), [57][58][59][60] and the latter represents the Warburg impedance (Z w ) for the finite transfer of Li + in graphene-based materials. Ohmic resistance (R e ) is represented by the interception of the loop in the high frequency region in the real axis.…”

Section: Resultsmentioning

confidence: 99%

“…Ohmic resistance (R e ) is represented by the interception of the loop in the high frequency region in the real axis. [57,60] The inset in Figure 8 is the equivalent circuit of the above Nyquist plots, and the corresponding fitting results are displayed in Table S2. By comparing the EIS spectra of both electrodes, it can be clearly inferred that the R e , R ct and Z w values of the 3DGA are obviously smaller than those of the comparative GP electrode, showing that the 3DGA electrode possesses a lower ohmic resistance, faster faradaic reaction and diffusion kinetics.…”

Section: Resultsmentioning

confidence: 99%

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Self‐Assembled Three‐Dimensional Graphene Aerogel with an Interconnected Porous Structure for Lithium‐Ion Batteries

Huang

Guo

et al. 2019

ChemElectroChem

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We report a low‐cost method for the fabrication of three‐dimensional graphene aerogel (3DGA) with an interconnected porous structure by using a simple hydrothermal reaction of graphite oxide (GO) in the presence of treated filter paper and subsequent annealing. In the hydrothermal process, the filter paper prevents GO sheets from intimate layer‐by‐layer stacking and serves as linkers to construct a three‐dimensional structural graphene hydrogel (GH). The pure 3DGA with an interconnected porous structure is achieved through the calcination of the GH with a three‐dimensional network structure. The as‐fabricated 3DGA electrode exhibits an improved lithium storage performance with a capacity of 712.8 mAh g−1 after 200 cycles at a rate of 200 mA g−1. More importantly, the electrode still shows a reversible capacity of 237.1 mAh g−1 even at a high rate of 1600 mA g−1, demonstrating its remarkable rate capability. The excellent electrochemical performance of the 3DGA electrode is ascribed to its distinct interconnected porous nanoarchitecture with exposed defects and edges as well as large specific surface area. The present design concept of 3DGA may provide a novel strategy for the preparation of advanced carbon materials for electrochemical energy storage systems.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Self‐Assembled Three‐Dimensional Graphene Aerogel with an Interconnected Porous Structure for Lithium‐Ion Batteries

Huang

Guo

et al. 2019

ChemElectroChem

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“…Cobalt‐based compounds have been exploited as both cathode and anode materials for Li‐ion batteries . Co 3 O 4 has been proved to be an efficient bifunctional catalyst for both ORR and OER reactions .…”

Section: Rational Selection Of Cathode Catalystsmentioning

confidence: 99%

Strategies toward High‐Performance Cathode Materials for Lithium–Oxygen Batteries

Wang

Zhu

Chen

2018

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Rechargeable aprotic lithium (Li)-O batteries with high theoretical energy densities are regarded as promising next-generation energy storage devices and have attracted considerable interest recently. However, these batteries still suffer from many critical issues, such as low capacity, poor cycle life, and low round-trip efficiency, rendering the practical application of these batteries rather sluggish. Cathode catalysts with high oxygen reduction reaction (ORR) and evolution reaction activities are of particular importance for addressing these issues and consequently promoting the application of Li-O batteries. Thus, the rational design and preparation of the catalysts with high ORR activity, good electronic conductivity, and decent chemical/electrochemical stability are still challenging. In this Review, the strategies are outlined including the rational selection of catalytic species, the introduction of a 3D porous structure, the formation of functional composites, and the heteroatom doping which succeeded in the design of high-performance cathode catalysts for stable Li-O batteries. Perspectives on enhancing the overall electrochemical performance of Li-O batteries based on the optimization of the properties and reliability of each part of the battery are also made. This Review sheds some new light on the design of highly active cathode catalysts and the development of high-performance lithium-O batteries.

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“…Chang et al. have reported the synthesis of a hierarchical CoO microflower film with a capacity of 277.8 mAh g −1 after 100 cycles at a current density of 90.9 mA g −1 . The same group has also reported the synthesis of a CoO microsphere film with a capacity of 172 mAh g −1 after 100 cycles at a current density of 100 mA g −1 .…”

Section: Introductionmentioning

confidence: 99%

Insight into the Superior Lithium Storage Properties of Ultrafine CoO Nanoparticles Confined in a 3 D Bimodal Ordered Mesoporous Carbon CMK‐9 Anode

et al. 2020

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Ultrafine CoO particles immobilized into the mesopores of three‐dimensional cubic bimodal ordered mesoporous carbon CMK‐9 is successfully prepared by using a combination of nanocasting and wet‐impregnation methods. It is found that the cubic bimodal interconnected mesoporous framework of CMK‐9 plays a crucial role in achieving the excellent electrochemical performances by assisting the rapid mass and charge transfer. Among the prepared nanocomposites, CoO(10)@CMK‐9 delivers a discharge capacity of 830 mAh g−1 after 200 cycles at a current density of 100 mA g−1 in lithium‐ion batteries. At a higher current density of 1000 mA g−1, the anode presents an outstanding discharge capacity of 636 mAh g−1 after 200 cycles. In sodium‐ion batteries, the anode provides a discharge capacity of 296 mAh g−1 after 250 cycles at a current density of 100 mA g−1. The remarkable performances of CoO(10)@CMK‐9 demonstrate the promising potentials of the nanocomposite as the anode for rechargeable batteries.

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Hierarchical CoO microflower film with excellent electrochemical lithium/sodium storage performance

Abstract: The hierarchical CoO microflower film prepared by a low-temperature solvothermal method shows excellent electrochemical lithium/sodium storage performances.

Cited by 77 publications

References 66 publications

Self‐Assembled Three‐Dimensional Graphene Aerogel with an Interconnected Porous Structure for Lithium‐Ion Batteries

Self‐Assembled Three‐Dimensional Graphene Aerogel with an Interconnected Porous Structure for Lithium‐Ion Batteries

Strategies toward High‐Performance Cathode Materials for Lithium–Oxygen Batteries

Insight into the Superior Lithium Storage Properties of Ultrafine CoO Nanoparticles Confined in a 3 D Bimodal Ordered Mesoporous Carbon CMK‐9 Anode

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