Two-Dimensional V<sub>2</sub>O<sub>5</sub> Sheet Network as Electrode for Lithium-Ion Batteries

Xu, Yun; Dunwell, Marco; Ling, Fei; Fu, Engang; Lin, Qianglu; Patterson, Brian M.; Yuan, Bin; Deng, Shuguang; Andersen, Paul Kent; Luo, Hongmei; Zou, Guifu

doi:10.1021/am505975n

Cited by 72 publications

(25 citation statements)

References 37 publications

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“…The corresponding anodic peaks at 2.45 and 2.73 V are assigned to the deintercalation of Li + ion process. The redox peaks at 3.4/3.1 V emerge around 50th cycle, which is related to δ-ε phase transformations [7,33]. The evolvement of discharge profiles with cycles at voltage range between 2 and 4 V is shown in Fig.…”

Section: Resultsmentioning

confidence: 93%

Nanosheet-structured vanadium pentoxide thin film as a carbon- and binder-free cathode for lithium-ion battery applications

Zeng

Yang

2015

J Solid State Electrochem

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Vanadium pentoxide (V 2 O 5 ) nanosheet thin film without conductive additives and binders has been synthesized via sol-gel and liquid phase deposition methods on ITO glass substrate followed by heat treatment at 450°C. The SEM and TEM results showed that the as-deposited film presents an intertwined nanowire structure with a length of several micrometers and a width of dozens of nanometers, and it transformed into nanosheet-like crystalline orthorhombic V 2 O 5 after annealing. Possible formation process of the nanowired structure is briefly discussed. The analysis of XRD confirmed that the film exhibits a strong preferred orientation along c-axis. The Raman spectrum verified the layered structure of the film. The corresponding electrochemical performance tests indicated that the binder-and carbon-free film possesses comparable high specific capacity and good cyclic stability to the conventional electrodes, which manifests that this facile synthesized material is quite promising and it provides a low-cost alternative for lithium-ion battery applications.

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Section: Resultsmentioning

confidence: 93%

Nanosheet-structured vanadium pentoxide thin film as a carbon- and binder-free cathode for lithium-ion battery applications

Zeng

Yang

2015

J Solid State Electrochem

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“…There is only a wide anodic peak at ~2.71 during the following 2nd–3rd cycles, illustrating the amorphous features and irreversible structural change of V 2 O 5 NBs operating in this voltage region (1.5–4 V). When V 2 O 5 NBs work at 2–4 V, three pairs of primary redox peaks appear at ~3.33/3.45, 3.08/3.35 and 2.14/2.56 V, indicating the reversible phase transition between α-Li x V 2 O 5 ↔ γ-Li x V 2 O 5 (x < 2) [31,32]. Thus, the subsequent GCD evaluation for V 2 O 5 NBs was performed between 2–4 V.…”

Section: Resultsmentioning

confidence: 99%

Controlled Hydrothermal Growth and Li+ Storage Performance of 1D VOx Nanobelts with Variable Vanadium Valence

Jiang

Zhou

et al. 2019

Nanomaterials

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One-dimensional (1D) vanadium oxide nanobelts (VOx NBs) with variable V valence, which include V3O7·H2O NBs, VO2 (B) NBs and V2O5 NBs, were prepared by a simple hydrothermal treatment under a controllable reductive environment and a following calcination process. Electrochemical measurements showed that all these VOx NBs can be adopted as promising cathode active materials for lithium ion batteries (LIBs). The Li+ storage mechanism, charge transfer property at the solid/electrolyte interface and Li+ diffusion characteristics for these as-synthesized 1D VOx NBs were systematically analyzed and compared with each other. The results indicated that V2O5 NBs could deliver a relatively higher specific discharge capacity (213.3 mAh/g after 50 cycles at 100 mA/g) and median discharge voltage (~2.68–2.71 V vs. Li/Li+) during their working potential range when compared to other VOx NBs. This is mainly due to the high V valence state and good crystallinity of V2O5 NBs, which are beneficial to the large Li+ insertion capacity and long-term cyclic stability. In addition, the as-prepared VO2 (B) NBs had only one predominant discharge plateau at the working potential window so that it can easily output a stable voltage and power in practical LIB applications. This work can provide useful references for the selection and easy synthesis of nanoscaled 1D vanadium-based cathode materials.

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“…(1) The hollow Ge/C electrode provides an internal void space to accommodate the volume expansion of Ge during lithiation/sodiation, reducing the eventual capacity fading. (2) The interconnected carbon hollow sphere frame provides sufficient flexibility to prevent the aggregation of Ge nanoparticles and the cracking of electrode material upon continuous cycling process, resulting in structural integrity of the electrode materials . Figure shows the morphology of the Ge/C hybrid material after 150 cycles for LIBs (Figure a,b) and for SIBs (Figure c,d).…”

Section: Resultsmentioning

confidence: 99%

Ge Nanoparticles Encapsulated in Interconnected Hollow Carbon Boxes as Anodes for Sodium Ion and Lithium Ion Batteries with Enhanced Electrochemical Performance

Zhang

Dong

et al. 2017

Part. Part. Syst. Charact.

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A carbothermal reaction route to Ge nanoparticle homogeneously encapsulated hollow carbon boxes from NH4H3Ge2O6/resorcinol formaldehyde precursors is designed, using NH4H3Ge2O6 as a Ge precursor from commercial GeO2 and NH4OH. The Ge/C hybrid anode for sodium ion battery displays a higher Na+ storage capacity of 346 mA h g−1 after 500 cycles at a current density of 100 mA h g−1, almost approaching the theoretical capacity of Ge. Furthermore, Ge/C anode shows significantly improved electrochemical performance for Li+ storage, showing a higher initial Coulombic efficiency of 85.1% and a superior reversible capacity of 1336 mA h g−1 at a high current density of 200 mA g−1 after 150 cycles. An excellent rate capability with a capacity of 825 mA h g−1 at a current density of 4.0 A g−1 can be obtained based on Ge/C anodes. The enhanced electrochemical performance can be attributed to the unique microstructures of Ge/C hybrid anode. The internal void space of hollow carbon boxes can accommodate the volume expansion of Ge during lithiation or sodiation process, thus preserving the structural integrity of electrode material. The interconnected carbon shell can increase the electronic conductivity of the electrode, resulting in the high rate capability and cycling stability.

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Two-Dimensional V₂O₅ Sheet Network as Electrode for Lithium-Ion Batteries

Cited by 72 publications

References 37 publications

Nanosheet-structured vanadium pentoxide thin film as a carbon- and binder-free cathode for lithium-ion battery applications

Nanosheet-structured vanadium pentoxide thin film as a carbon- and binder-free cathode for lithium-ion battery applications

Controlled Hydrothermal Growth and Li+ Storage Performance of 1D VOx Nanobelts with Variable Vanadium Valence

Ge Nanoparticles Encapsulated in Interconnected Hollow Carbon Boxes as Anodes for Sodium Ion and Lithium Ion Batteries with Enhanced Electrochemical Performance

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Two-Dimensional V2O5 Sheet Network as Electrode for Lithium-Ion Batteries

Cited by 72 publications

References 37 publications

Nanosheet-structured vanadium pentoxide thin film as a carbon- and binder-free cathode for lithium-ion battery applications

Nanosheet-structured vanadium pentoxide thin film as a carbon- and binder-free cathode for lithium-ion battery applications

Controlled Hydrothermal Growth and Li+ Storage Performance of 1D VOx Nanobelts with Variable Vanadium Valence

Ge Nanoparticles Encapsulated in Interconnected Hollow Carbon Boxes as Anodes for Sodium Ion and Lithium Ion Batteries with Enhanced Electrochemical Performance

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Two-Dimensional V₂O₅ Sheet Network as Electrode for Lithium-Ion Batteries