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関連する概念動画

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
Nitriles to Amines: LiAlH4 Reduction00:55

Nitriles to Amines: LiAlH4 Reduction

Nitriles are reduced to amines in the presence of strong reducing agents like lithium aluminum hydride through a typical nucleophilic acyl substitution. The reaction requires two equivalents of the reducing agent. The reducing agent acts as a source of hydride ions.
As shown below, the mechanism involves three steps. Firstly, the hydride ion acting as a nucleophile attacks the nitrile carbon to form an anion. In the second step, a second equivalent of the hydride ion attacks the anion to...
Electrophilic Aromatic Substitution: Nitration of Benzene01:20

Electrophilic Aromatic Substitution: Nitration of Benzene

The nitration of benzene is an example of an electrophilic aromatic substitution reaction. It involves the formation of a very powerful electrophile, the nitronium ion, which is linear in shape. The reaction occurs through the interaction of two strong acids, sulfuric and nitric acid.
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,...
Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.

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Updated: May 16, 2026

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

リチウム-ニトリル相互作用によって有効化されたリチウム-硫黄電池カトド.

Juchen Guo1, Zichao Yang, Yingchao Yu

  • 1School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, USA. jguo@engr.ucr.edu

Journal of the American Chemical Society
|December 14, 2012
PubMed
まとめ

研究者らは,高エネルギー電池用の新しい硫化リチウム炭素複合物を開発した. この材料は,ポリスルファイドのシャットリングを効果的に防止し,リチウムイオン電池の高容量と効率をもたらします.

科学分野:

  • マテリアルサイエンス 材料科学
  • 電気化学 電気化学について
  • エネルギー貯蔵 エネルギー貯蔵

背景:

  • 硫化リチウム (Li2S) は,高エネルギーリチウムイオン電池のための有望なカトド材料です.
  • リチウムポリスルファイドの溶解とシャッティングを防ぐことは,Li2S カソドの安定性にとって極めて重要です.
  • 既存の方法はしばしば金属リチウムアノドを必要とし,安全性に関する懸念を提起しています.

研究 の 目的:

  • 新しい硫化リチウムと炭素の複合材料であるカトド材料を開発する.
  • カトド構造内のリチウムポリ硫化物を隔離するための固有メカニズムを作成する.
  • リチウムイオン電池における新しい複合物の電気化学的性能を評価する.

主な方法:

  • リチウム硫化物-炭素複合材料の合成は,ポリマー前駆体 (ポリアクリロニトリル) から派生した炭素主体内にLi2Sを分散させることによる.
  • ポリマーの前体におけるリチウムイオンとニトリル群の相互作用を利用して,Li2Sの分布を制御する.
  • 先駆者を炭化してLi2S-炭素複合構造を形成する.
  • 半電池リチウム電池のセットアップにおけるカトド材料としての複合材料の評価.

主要な成果:

さらに関連する動画

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
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In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries

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Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
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Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy

Published on: January 20, 2023

関連する実験動画

Last Updated: May 16, 2026

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
10:03

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
11:25

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries

Published on: November 10, 2014

Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
07:20

Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy

Published on: January 20, 2023

  • 合成されたLi2S-炭素複合材料は,Li2Sの均一な分散を示した.
  • 複合建築は,リチウムポリ硫化物を効果的に隔離し,シャトル輸送を緩和しました.
  • カトド材料は高ガルバニック充電/放電容量を示した.
  • 電気化学サイクリングで優れたクーロンビック効率を達成しました.

    • 結論:

    • 提案された複合建築は,Li2Sを均一に分配し,ポリ硫化物を隔離するのに効果的です.
    • このアプローチは,高度なリチウムイオン電池のための安定的で高性能の硫化リチウムカトドの開発に有効な経路を提供します.
    • この方法は,金属リチウムアノドの必要性を回避し,バッテリーの安全性とエネルギー密度を高めます.