Nitrogen‐Doped Graphene Ribbon Assembled Core–Sheath MnO@Graphene Scrolls as Hierarchically Ordered 3D Porous Electrodes for Fast and Durable Lithium Storage

Zhang, Yun; Chen, Penghui; Gao, Xu; Wang, Bo; Liu, Heng; Wu, Hao; Liu, Huan; Dou, Shi Xue

doi:10.1002/adfm.201603716

Cited by 250 publications

(172 citation statements)

References 54 publications

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“…An ultrahigh discharge capacity of 1102 mAh g −1 is yielded even after 250 cycles, indicating the robust cyclability even under the long-term and fast discharge/charge cycling. Interestingly, there is a capacity increasing stage after a slow capacity decay, which has been reported for most transition metal oxides 62, 77 . Such an activation behavior for LIBs originates from the gradually emerging interfacial storage contribution, which can be attributed to the faradaic contribution of pseudo-capacitance and non-faradaic contribution of double-layer capacitance 78 .…”

Section: Resultssupporting

confidence: 53%

Copper ferrites@reduced graphene oxide anode materials for advanced lithium storage applications

Wang

Deng

et al. 2017

Sci Rep

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Copper ferrites are emerging transition metal oxides that have potential applications in energy storage devices. However, it still lacks in-depth designing of copper ferrites based anode architectures with enhanced electroactivity for lithium-ion batteries. Here, we report a facile synthesis technology of copper ferrites anchored on reduced graphene oxide (CuFeO2@rGO and Cu/CuFe2O4@rGO) as the high-performance electrodes. In the resulting configuration, reduced graphene offers continuous conductive channels for electron/ion transfer and high specific surface area to accommodate the volume expansion of copper ferrites. Consequently, the sheet-on-sheet CuFeO2@rGO electrode exhibits a high reversible capacity (587 mAh g−1 after 100 cycles at 200 mA g−1). In particular, Cu/CuFe2O4@rGO hybrid, which combines the advantages of nano-copper and reduced graphene, manifests a significant enhancement in lithium storage properties. It reveals superior rate capability (723 mAh g−1 at 800 mA g−1; 560 mAh g−1 at 3200 mA g−1) and robust cycling capability (1102 mAh g−1 after 250 cycles at 800 mA g−1). This unique structure design provides a strategy for the development of multivalent metal oxides in lithium storage device applications.

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Section: Resultssupporting

confidence: 53%

Copper ferrites@reduced graphene oxide anode materials for advanced lithium storage applications

Wang

Deng

et al. 2017

Sci Rep

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“…Cyclic voltammetry (CV) was tested using a CHI660D electrochemical workstation (Chenhua, Shanghai, China) in the voltage range of 0.01 to 3.0 V (vs. Li/Li + ) at different scan rates. [17] Figure 3f shows the HAADF-STEM image and corresponding EDS elemental maps of the PCMS@MnOÀ M, confirming the existence and uniform distribution of C, Mn, and O elements in the prepared samples. All tests were carried out at room temperature.…”

Section: Electrochemical Characterizationmentioning

confidence: 53%

“…[37] The diffraction peaks at 34.9°,40.6°, 58.8°, 70.2°, and 73.9°correspond to the (111), (200), (220), (311), and (222) crystal planes of cubic phase MnO, [15,26] respectively. [17,38] In addition to the vibration modes of MnO phase, two broad Raman bands in the range of 1200~1700 cm À 1 are observed. The amorphous carbon peaks at 22.8°and 43.1°observed from the sample that MnO is removed by acid-etching is not apparent, indicating that the weight content of carbon shell is not large ( Figure S2).…”

Section: Resultsmentioning

confidence: 99%

“…[1][2][3][4][5] However, due to low theoretical capacity (372 mAh g À 1 ) and small interlayer distance (0.34 nm) of commercial graphite anode, current commercial LIBs are almost reaching to performance limitation. [9][10][11][12][13][14][15][16][17][18] Particularly, MnO have attracted much attention as anode material for LIBs due to its high theoretical capacity of 756 mAh g À 1 , low voltage hysteresis of < 0.8 V, environmental friendliness and natural abundance in earth. Among various materials, transition-metal oxides (M x O y , M = Mn, Co, Fe, V and Ni) are promising in high-performance anode materials due to high theoretical specific capacity and low electromotive force value.…”

Section: Introductionmentioning

confidence: 99%

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Hierarchically Pomegranate‐Like MnO@porous Carbon Microspheres as an Enhanced‐Capacity Anode for Lithium‐Ion Batteries

Gao

Huang

et al. 2019

ChemElectroChem

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Transition-metal oxides have attracted much attention as promising anode materials, owing to high theoretical specific capacity for lithium-ion batteries (LIBs). However, rapid performance degradation derived from poor electrical conductivity and drastic volume changes during the repeated lithium insertion/ extraction processes has limited their practical applications. In this work, we design and prepare pomegranate-like microspheres of nano-sized MnO particles with gaps among them as the core and porous carbon as the shell (designated as PCMS@MnO) by using a facile three-step process. In such unique PCMS@MnO, the porous carbon shell from phenolic resin is beneficial for the electronic conductivity and wettability, whereas the nano-sized MnO particles with gaps among them confined in the porous carbon shell can effectively prevent aggregation and pulverization of active materials. As an anode material for LIBs, the PCMS@MnO with a carbon content of about 12 wt % exhibits remarkably high reversible capability (935 mAh g À 1 at 100 mA g À 1 ), outstanding rate performance, and superior cycling stability (527 mAh g À 1 of 2000 mA g À 1 after 2000 cycles). Our results suggest a great potential of pomegranate-like transition-metal oxide-based composites as anode materials in high-performance LIBs.

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“…Highly conductive inks are the best medium to fabricate highly conductive film by simple printing methods. Graphene ink is a promising candidate for the construction of high conductivity film owing to its 2D nature and unprecedented electrical conductivity [65][66][67]. The preparation route of graphene includes mechanical stripping method, epitaxial growth, chemical vapor deposition, Hummers method, solvent/surfactant assisted electrochemical exfoliation, etc.…”

Section: Electrochemical Exfoliation For 2d Graphenementioning

confidence: 99%

Nanofabrication strategies for advanced electrode materials

Chen

Xue

2017

Nanofabrication

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Advanced energy storage devices, i.e., Li-ion battery, supercapacitor, need high electroactive metal oxide materials with stable structure during charging/ discharging cycling [1][2][3]. However, metal oxide electrode materials often suffer from low conductivity, and slow ion diffusion rate during electrochemical redox reaction. In recent years, lots of efforts are done to design nanostructured materials to enhance their function. When downsizing to nanosize, the electroactive areas of materials are increased and ion/electron diffusion length is shortened, and therefore specific capacitance of active materials is significantly enhanced [4][5][6]. For example, 3D holey-graphene/niobia composite architectures have been designed to show ultrahigh-rate energy storage performance [7]. The highly interconnected graphene network in the 3D architecture shows excellent electron transport properties, while its hierarchical porous structure enables rapid ion transport. Although the nanostructured materials have shown extraordinary promise for electrochemical energy storage, most of the existing synthesis techniques require multistep and laborious procedures [8,9]. The dual pressure of energy needs and environmental requirements in society demand the rapid screening of exceptional performance materials to shorten R&D of advanced energy storage devices. As shown in Figure 1a, R&D of electrode materials mainly includes structure & component design, materials synthesis and performance evaluation. During these processes, materials synthesis often need longer time and complex equipments, which increase the finding time of new electrode materials. The development of easy and fast nanofabrication strategy can accelerate finding rate of new electrode materials in laboratory (Figure 1b). Furthermore, with creative design idea, the material synthesis process can be replaced or fused into one structure-performance process (Figure 1c), which not only accelerate the finding rate of new electrode materials, but also decrease the cost of searching new electrode materials. Abstract: The development of advanced electrode materials for high-performance energy storage devices becomes more and more important for growing demand of portable electronics and electrical vehicles. To speed up this process, rapid screening of exceptional materials among various morphologies, structures and sizes of materials is urgently needed. Benefitting from the advance of nanotechnology, tremendous efforts have been devoted to the development of various nanofabrication strategies for advanced electrode materials. This review focuses on the analysis of novel nanofabrication strategies and progress in the field of fast screening advanced electrode materials. The basic design principles for chemical reaction, crystallization, electrochemical reaction to control the composition and nanostructure of final electrodes are reviewed. Novel fast nanofabrication strategies, such as burning, electrochemical exfoliation, and their basic principles are also summarized. More im...

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Nitrogen‐Doped Graphene Ribbon Assembled Core–Sheath MnO@Graphene Scrolls as Hierarchically Ordered 3D Porous Electrodes for Fast and Durable Lithium Storage

Cited by 250 publications

References 54 publications

Copper ferrites@reduced graphene oxide anode materials for advanced lithium storage applications

Copper ferrites@reduced graphene oxide anode materials for advanced lithium storage applications

Hierarchically Pomegranate‐Like MnO@porous Carbon Microspheres as an Enhanced‐Capacity Anode for Lithium‐Ion Batteries

Nanofabrication strategies for advanced electrode materials

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