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Precipitation Gravimetry01:03

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...

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Effect of Microwave Synthesis Conditions on the Structure of Nickel Hydroxide Nanosheets
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Disentangling Li Diffusion Characteristics in Amorphous Nickel Oxide.

Chao Tang1, Changlong Cai1,2, Huachen Liu1

  • 1School of Optoelectronic Engineering, Xi'an Technological University, Xi'an 710021, China.

Nanomaterials (Basel, Switzerland)
|May 26, 2026
PubMed
Summary

This study reveals how oxygen content in amorphous nickel oxide (NiO) thin films impacts lithium-ion (Li+) diffusion, crucial for energy-efficient electrochromic devices like smart windows.

Keywords:
AIMDSGCPMDdensity functional theorydiffusionmolecular dynamicsnickel oxide

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Computational Physics

Background:

  • Nickel oxide (NiO) thin films are vital for electrochromic devices and energy efficiency.
  • Limited understanding exists regarding lithium-ion (Li+) diffusion in amorphous NiO.

Purpose of the Study:

  • To investigate the influence of oxygen content on Li+ diffusion mechanisms in amorphous NiO.
  • To establish a structure-diffusion relationship in amorphous NiO.

Main Methods:

  • First-principles calculations and molecular dynamics simulations were used to model amorphous NiO.
  • Melt-quenching method created amorphous NiO models with varied oxygen content.

Main Results:

  • Li+ diffusion coefficient increases with higher oxygen content in amorphous NiO.
  • Diffusion barriers for Li+ decrease as oxygen content rises.
  • Li coordination with under-coordinated Ni-O polyhedra facilitates ion migration.

Conclusions:

  • Oxygen stoichiometry significantly modulates Li+ transport in amorphous NiO.
  • Provides atomistic insights into ion diffusion for improved electrochromic material design.