Black BiVO<sub>4</sub>: size tailored synthesis, rich oxygen vacancies, and sodium storage performance

Xu, Xiaosa; Xu, Youxun; Xu, Fei; Jiang, Guangshen; Jian, Jie; Yu, Huiwu; Zhang, Enming; Shchukin, Dmitry G.; Kaskel, Stefan; Wang, Hongqiang

doi:10.1039/c9ta13021g

Cited by 64 publications

(31 citation statements)

References 49 publications

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“…S(1) in the ESM) for EE-MoS2 ( Fig. 4(e)), respectively, suggesting the simultaneous presence of diffusiondominated and capacitive contributions to capacity [40][41][42]. Whereas the b values of peaks A and C are 0.91 (diffusiondominated and capacitive contributions) and 1.13 (only capacitive contribution) for ED-MoS2 (Fig.…”

Section: Resultsmentioning

confidence: 94%

Edge-enriched MoS2 for kinetics-enhanced potassium storage

Han

et al. 2020

Nano Res.

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Potassium-ion batteries (PIBs) hold great promise as alternatives to lithium ion batteries in post-lithium age, while face challenges of slow reaction kinetics induced by the inherent characteristics of large-size K +. We herein show that creating sufficient exposed edges in MoS 2 via constructing ordered mesoporous architecture greatly favors for improved kinetics as well as increased reactive sites for K storage. The engineered MoS 2 with edge-enriched planes (EE-MoS 2) is featured by three-dimensional bicontinuous frameworks with ordered mesopores of ~ 5.0 nm surrounded by thin wall of ~ 9.0 nm. Importantly, EE-MoS 2 permits exposure of enormous edge planes at pore walls, renders its intrinsic layer spacing more accessible for K + and accelerates conversion kinetics, thus realizing enhanced capacity and high rate capability. Impressively, EE-MoS 2 displays a high reversible charge capacity of 506 mAh•g −1 at 0.05 A•g −1 , superior cycling capacities of 321 mAh•g −1 at 1.0 A•g −1 after 200 cycles and a capacity of 250 mAh•g −1 at 2.0 A•g −1 , outperforming edge-deficient MoS 2 with nonporous bulk structure. This work enlightens the nanoarchitecture design with abundant edges for improving electrochemical properties and provides a paradigm for exploring high-performance PIBs.

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Section: Resultsmentioning

confidence: 94%

Edge-enriched MoS2 for kinetics-enhanced potassium storage

Han

et al. 2020

Nano Res.

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“…[36] For CoMoO -N , the intensities of Raman peaks decrease and shift to the lower frequencies in comparison to that of CoMoO 4 -Air, indicating the existence of the increased distorted crystal lattice and disordered surface caused by oxygen vacancies. [37,38] The XPS detection is performed to study the detailed electronic states and chemical composition of the samples. The Co 2p spectrum in Figure 3c can be well assigned to the Co 2 + 2p 1/2 (796.9 eV), 2p 3/2 (780.5 eV), and their satellite peaks, respectively.…”

Section: Resultsmentioning

confidence: 99%

Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

et al. 2020

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The application of transition-metal oxides in the energy storage field is hampered by its low electronic conductivity, sluggish Li + diffusion, and huge volume changes. The construction of oxygen vacancy defects can effectively modify the electronic structure of the active materials, accelerating the charge transfer process. Herein, the CoMoO 4 nanorods with different oxygen vacancy concentrations are synthesized through the facile calcination process under N 2 and Air atmospheres. The ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) analysis and Density Functional Theory (DFT) calculation results confirm that the bandgap reduces along with the increment of the oxygen vacancy content. The CoMoO 4-N 2 with higher oxygen vacancy concentration exhibits more superior electrochemical performance than CoMoO 4-Air, which delivers an ultrahigh specific capacity (999 mA h g À 1 after 500 cycles at 0.5 A g À 1), remarkable rate capacity (477 mA h g À 1 at 9 A g À 1), and excellent cycling stability (650 mA h g À 1 after 1000 cycles at 2 A g À 1).

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“…Likewise, the needle-like hyperbranched BiVO 4 anode for SIBs delivered 897 and 432 mAh g −1 for the first and 200th cycles at 0.1 A g −1 , respectively. [73] To improve the cycle performance, Xu et al [74] designed BiVO 4 nanoparticles with tailored sizes and rich oxygen vacancies via a method of pulsed laser irradiation of colloidal nanoparticles (PLICN), which can modulate the size of BiVO 4 colloids by varying the irradiation time and induced oxygen vacancies upon laser irradiation. When anchored the BiVO 4 colloids on reduced graphene oxide (rGO) substrate, BiVO 4 -rGO electrode presented an outstanding cycle stability (470 mAh g −1 after 200 cycles at 0.1 A g −1 ) and remarkable rate capability (297 mAh g −1 at 2 A g −1 ) for SIBs benefiting to the synergistic effect of nanosize dependent fast kinetic characteristics and oxygen vacancy defects (Figure 10e,f).…”

Section: Other Bismuth-based Materialsmentioning

confidence: 99%