Edge-rich vertical graphene nanosheets templating V2O5 for highly durable zinc ion battery

Zhang, Xiang; Tang, Yachen; He, Pingge; Zhang, Zhao; Chen, Tengfei

doi:10.1016/j.carbon.2020.10.034

Cited by 62 publications

(43 citation statements)

References 41 publications

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“…Recently, vertically oriented graphene nanosheets (VGNs) arrays as nanoscale substrate were grown on the microscale flexible substrate, which were widely applied in the energy-related fields. [42][43][44][45][46][47] The introduction of VGNs arrays constructs a continuous, interwoven, and conductive network in nanoscale, which could greatly improve the electrical conductivity of the substrate. Furthermore, porous VGNs arrays could provide lots of active sites and edges for supporting active materials, form large amounts of space and channels for electrolyte transport, and improve the agglomeration of traditional graphene sheets.…”

Section: Introductionmentioning

confidence: 99%

All Si₃N₄ Nanowires Membrane Based High‐Performance Flexible Solid‐State Asymmetric Supercapacitor

Yin

Han

et al. 2021

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Recently, much attention has been drawn in the development of flexible energy storage devices due to the increasing demands for flexible/portable electronic devices with high energy density, low weight, and good flexibility. Herein, vertically oriented graphene nanosheets (VGNs) are in situ fabricated on the surface of free‐standing and flexible Si3N4 nanowires (NWs) membrane by plasma‐enhanced chemical vapor deposition (PECVD), which are directly used as flexible nanoscale conductive substrates. NiCo2O4 hollow nanospheres (HSs) and FeOOH amorphous nanorods (NRs) are finally prepared on Si3N4NWs@VGNs, which are served as the positive and negative electrodes, respectively. Profiting from the structural merits, the synthesized Si3N4NWs@VGNs@NiCo2O4HSs and Si3N4NWs@VGNs@FeOOHNRs membrane electrodes exhibit remarkable electrochemical performance. Using Si3N4NWs membrane as the separator, the assembled all Si3N4NWs membrane‐based flexible solid‐state asymmetric supercapacitor (ASC) with a wide operating potential window of 1.8 V yields the outstanding energy density of 96.3 Wh kg−1, excellent cycling performance (91.7% after 6000 cycles), and good mechanical flexibility. More importantly, this work provides a rational design strategy for the preparation of flexible electrode materials and broadens the applications of Si3N4NWs in the field of energy storage.

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Section: Introductionmentioning

confidence: 99%

All Si₃N₄ Nanowires Membrane Based High‐Performance Flexible Solid‐State Asymmetric Supercapacitor

Yin

Han

et al. 2021

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“…It can be found that the rate capability of the PC/V 2 O 5 ⋅ n H 2 O is much better than that of V 2 O 5 ⋅ n H 2 O. Figure 4d reveals the specific discharge capacity of PC/V 2 O 5 ⋅ n H 2 O electrode at various current densities in comparison to other previously reported V‐based composites for RAZIBs, suggesting that the PC/V 2 O 5 ⋅ n H 2 O electrode has a better rate performance than other materials [35,36,51,52] . The galvanostatic charge‐discharge profiles of PC/V 2 O 5 ⋅ n H 2 O and V 2 O 5 ⋅ n H 2 O electrodes at 0.5 A g −1 present in Figure S5.…”

Section: Resultsmentioning

confidence: 84%

“…For comparison, the zinc storage performance of [35,36,51,52] The galvanostatic charge-discharge profiles of PC/V ). [38] Moreover, the formed Zn 3 (OH) 2 (V 2 O 7 ) • 2H 2 O phase can be observed during the whole charging process, which is consistent with previous reports.…”

Section: Resultsmentioning

confidence: 99%

Sandwich Structure of 3D Porous Carbon and Water‐Pillared V₂O₅ Nanosheets for Superior Zinc‐Ion Storage Properties

Shao

Zeng

et al. 2021

ChemElectroChem

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Vanadium oxides are promising cathode materials for rechargeable aqueous zinc-ion batteries (RAZIBs). However, the selfagglomeration and poor ion/electron conductivity of vanadium oxides in the charge/discharge process usually lead to low capacity and capacity attenuation, which limits their commercial application. Herein, we report a facile and mass-production method for fabricating 3D porous carbon/water-pillared V 2 O 5 nanosheet composites with sandwich structure (PC/V 2 O 5 • nH 2 O), which can further reduce the preparation cost of vanadiumoxide-based cathodes. Moreover, the excellent structural characteristics of PC/V 2 O 5 • nH 2 O not only effectively inhibits the aggregation and stacking of V 2 O 5 • nH 2 O but also increases the contact area between the active substance and the electrolyte, which is conducive to the transport of zinc ions and improves the electrochemical performance of RAZIBs. The PC/V 2 O 5 • nH 2 O cathode displays an excellent rate performance (325.3 mAh g À 1 at high current density 20 A g À 1 ), a high specific discharge capacity of 415.4 mAh g À 1 at 0.5 A g À 1 , an outstanding cyclic stability, and capacity retention (after 1000 cycles the capacity retention rate about 97.1 %). Ex situ XRD patterns reveal that the charge/discharge process of the PC/V 2 O 5 • nH 2 O electrode undergoes a reversible intercalation and conversion process. The method used in this work provides an idea for large-scale synthesis of vanadium-based cathode materials for multivalent batteries.

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“…With the combined advantages of rich active sites, highly accessible surface, highly conductive network, large interlayer spacing, as well as robust structural stability, this anode exhibited a high capacity (344.3 mAh g −1 ), excellent rate capability (2000 mA g −1 ; 46.5 % capacity retention), and prominent long‐term cycling stability (82 % capacity retention after 1000 cycles), outperforming most of the recently reported carbonaceous anodes. Moreover, VG has also been proposed as nanotemplates for V 2 O 5 for high‐performance zinc ion battery (ZIB) [102] . In such a hybrid structure, VG provided fast channels for electron transfer and large accessible surface area to the electrolyte, and acted as a bridge between the V 2 O 5 nanosheets and current collector, offering a sufficient room for volume change.…”

Section: Applications In Electrochemical Energy‐storage Systemsmentioning

confidence: 99%

Vertically Oriented Graphene Nanosheets for Electrochemical Energy Storage

Chen

2021

ChemElectroChem

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Vertically oriented graphene (VG) nanosheets exhibit unique structural characteristics, such as large accessible surface area, rich edges, high electrical conductivity, open network channels, and agglomeration resistance, for electrochemical energy‐storage applications (e. g., supercapacitors, lithium‐ion batteries, etc.). In this Review article, we summarize recent progress in the design and engineering of VG‐based electrodes for high‐performance electrochemical energy technologies within the context of energy‐storage mechanisms and charge‐transfer kinetics, and include a perspective to highlight the challenges and promises in the exploitation of vertically oriented two‐dimensional carbon nanostructures for further enhancement of the performance of electrochemical energy‐storage devices.

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Edge-rich vertical graphene nanosheets templating V2O5 for highly durable zinc ion battery

Cited by 62 publications

References 41 publications

All Si₃N₄ Nanowires Membrane Based High‐Performance Flexible Solid‐State Asymmetric Supercapacitor

All Si₃N₄ Nanowires Membrane Based High‐Performance Flexible Solid‐State Asymmetric Supercapacitor

Sandwich Structure of 3D Porous Carbon and Water‐Pillared V₂O₅ Nanosheets for Superior Zinc‐Ion Storage Properties

Vertically Oriented Graphene Nanosheets for Electrochemical Energy Storage

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Edge-rich vertical graphene nanosheets templating V2O5 for highly durable zinc ion battery

Cited by 62 publications

References 41 publications

All Si3N4 Nanowires Membrane Based High‐Performance Flexible Solid‐State Asymmetric Supercapacitor

All Si3N4 Nanowires Membrane Based High‐Performance Flexible Solid‐State Asymmetric Supercapacitor

Sandwich Structure of 3D Porous Carbon and Water‐Pillared V2O5 Nanosheets for Superior Zinc‐Ion Storage Properties

Vertically Oriented Graphene Nanosheets for Electrochemical Energy Storage

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All Si₃N₄ Nanowires Membrane Based High‐Performance Flexible Solid‐State Asymmetric Supercapacitor

All Si₃N₄ Nanowires Membrane Based High‐Performance Flexible Solid‐State Asymmetric Supercapacitor

Sandwich Structure of 3D Porous Carbon and Water‐Pillared V₂O₅ Nanosheets for Superior Zinc‐Ion Storage Properties