2024年2月1日 · Owing to multi-electron redox reactions and versatile cation storage capabilities, laminated structured metallic vanadate of NH4 V 4 O 10 (NHVO) has been regarded as a kind of promising cathode materials for aqueous Zn-ion batteries …

As presented in Figure 4 b, the observed Raman shifts at 251, 370, and 495 cm −1 can be attributed to the Zn−OH vibrations in the fully discharged state, suggesting the formation of Zn 3 (OH ...

2024年11月1日 · NHVO/Ti 3 C 2 T x materials help ions move and speed up chemical reactions. The development of vanadium-based materials as electrode materials coincides with the need for aqueous aluminum ion batteries (AAIBs) due to their advantages of multiple valence states available for energy storage and high mass capacity density.

Thermal decomposition of NHVO under N and NH+ HO has been studied on a molecular level by Raman spectroscopy in the temperature range 150–400 °C. Under N , the decomposition mechanism leading to formation of VO has been observed to proceed two intermediates: an amorphous, transitional (NH)VO and NHVO .

2021年1月19日 · Here, ammonium heptavanadate (NH 4) 2 V 7 O 16 ·3.2H 2 O (NHVO) nanosquares with mixed-valence V 5+ /V 4+ as a cathode are developed for high-performance ZIBs. The layered NHVO shows a capacity of 362 mA h g –1 at 0.05 A g –1, with a high energy density of 263.5 W h kg –1.

2024年10月18日 · To address these issues, we introduce oxygen vacancies into NH 4 V 4 O 10 nanosheets to improve the ion transport rate during the electrochemical reaction. The prepared NHVO-40 samples provide many active sites compared to NH 4 V 4 O 10 materials. The assembled cell delivers a capacity of 452.03 mAh g −1 at a current density of 0.2 A g −1.

In this work, we rationally design Ni-doped V2O5@3D Ni core/shell composite on carbon cloth electrode (Ni-V2O5@3D Ni@CC) by growing Ni-V2O5 on the free-standing 3D Ni metal nanonets for...

Download scientific diagram | Structural characterization of NHVO/C: a) XRD pattern, b) crystal structure, c) Raman spectrum, d) thermogravimetric curves, e) survey XPS spectra, f) V 2p, g) N...

2019年5月15日 · We review the available data on the structures and Raman spectra of vanadium oxides, VOx. We also present our own results concerning such phases as α- and β-vanadium, V14O6, VO, V2O3, V3O5, several p...

2024年5月3日 · NHVO-H@GO@CNT, in a regulated Calcium bis((trifluoromethyl)sulfony)amide/tetraglyme (Ca(TFSI) 2 /G4) electrolyte, delivers a 305 mAh g −1 high capacity at 20 mA g −1 and 10 000 cycles record-long life at 500 mA g −1 under room temperature. The excellent electrochemical performance benefits from the good stability of both the electrode and ...