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関連する概念動画

Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
Ionic Crystal Structures02:42

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Formation of Complex Ions03:45

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Electrochemical Systems01:24

Electrochemical Systems

Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...

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関連する実験動画

Updated: Jul 8, 2026

Fabrication of VB2/Air Cells for Electrochemical Testing
09:04

Fabrication of VB2/Air Cells for Electrochemical Testing

Published on: August 5, 2013

Ag4V2O6F2:電気化学的に活性で,銀の密度が高い相である.

Erin M Sorensen1, Heather K Izumi, John T Vaughey

  • 1Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, USA.

Journal of the American Chemical Society
|April 28, 2005
PubMed
まとめ

新しい銀のヴァナジウム酸化フッ素 (Ag(4) V(2) O(6) F(2) を合成し,プライマリリチウム電池のカトドとして試験した. それは有望な容量と,既存の銀のヴァナジウム酸化物材料よりも高い動作電圧を示しています.

科学分野:

  • 材料科学 材料科学とは
  • 無機化学 無機化学とは
  • 電気化学 電気化学について

背景:

  • 新種のカトド材料の開発は,一次リチウム電池技術の進歩に不可欠です.
  • シルバーバナジウム酸化物は,確立されたカトド材料ですが,新しい組成を探求することで性能を向上させることができます.

研究 の 目的:

  • 新しい銀のバナジウム酸化物フッ化物相,Ag(4) V(2) O(6) F(2) を合成し,特徴づけました.
  • 主要リチウム電池のカトド材料としてのAg(4) V(2) O(6) F(2) の電気化学性能を評価する.

主な方法:

  • 単一結晶の成長のための低温水熱合成.
  • 単一結晶X線 difraktionと,構造的特徴化のためのIRスペクトロスコーピーを用いる.
  • 主要リチウム電池カソッドとしての電気化学的評価.

主要な成果:

  • 新しいモノクリニック・フェーズ,Ag(4) V(2) O(6) F(2) (スペースグループP2(1)/n) を成功して合成し,特徴づけました.
  • この材料は,3.5Vと2.3Vの2つの放電領域を示しており,これはバナジウム酸化物フッ化物フレームの減少に起因する.
  • 名目容量は251 mAh/g,高圧は148 mAh/g,高圧は3 V,高圧3.5 VはAg(2) V(4) O(11) よりもかなり高い.

さらに関連する動画

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
10:42

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)

Published on: December 29, 2016

Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

関連する実験動画

Last Updated: Jul 8, 2026

Fabrication of VB2/Air Cells for Electrochemical Testing
09:04

Fabrication of VB2/Air Cells for Electrochemical Testing

Published on: August 5, 2013

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
10:42

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)

Published on: December 29, 2016

Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

結論:

  • Ag ((4) V ((2) O ((6) F ((2)) は,一次リチウム電池のための新しいカトド材料である.
  • より高い動作電圧と容量は,バッテリーの性能を改善する可能性を示唆しています.
  • この酸化フッ素をバッテリー用途に最適化するためのさらなる研究が必要である.