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関連する概念動画

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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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...
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Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

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Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
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Voltaic/Galvanic Cells02:47

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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,...
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Electrolysis03:00

Electrolysis

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In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
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Updated: Sep 29, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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高性能リチウム酸素電池のための低揮発性で耐久性の高い深層エウテクティック電解質

Chao-Le Li1,2, Gang Huang2, Yue Yu2

  • 1Key Laboratory of Automobile Materials, Ministry of Education, Department of Materials Science and Engineering, Jilin University, Changchun 130022, P. R. China.

Journal of the American Chemical Society
|March 24, 2022
PubMed
まとめ

研究者はリチウム酸素電池 (LOB) のための新しい深層エウテクティック電解質 (DEE) を開発しました. この安定した電解質は,長期にわたるLOBの動作を可能にし,エネルギー貯蔵の可能性を高めます.

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科学分野:

  • 電気化学
  • 材料科学
  • エネルギー貯蔵

背景:

  • リチウム酸素電池 (LOB) は理論的には高いエネルギー密度を持っていますが,不安定な電解質に苦しんでいます.
  • 現在の電解質は酸化環境,リチウム金属アノドの反応性,溶媒の蒸発と闘う.

研究 の 目的:

  • リチウム酸素電池を長期にわたって使用できる 安定した効率的な電解質の開発
  • LOBにおける従来の電解質の限界を解決する.

主な方法:

  • N-メチラセタミド (NMA) とリチウムビス・トリフローロメタン・スルフォニル・イミド (LiTFSI) を混合して,深層エレクトロライト (DEE) を合成した.
  • NMAベースのDEEの特性 (イオン伝導性,安定性,互換性) を評価した.
  • NMAベースのDEEを使用したLOBが組み立てられ,性能がテストされました.

主要な成果:

  • NMAベースのDEEは,高いイオン伝導性,優れた熱,化学,電気化学の安定性を示した.
  • DEEはリチウム金属アノドとの良好な互換性を示した.
  • NMAベースのDEEを使用したLOBは,高い放電容量 (8647 mAh g−1) を達成し,優れた速度性能と280サイクルのサイクル寿命を達成しました.

結論:

  • 開発されたNMAベースのDEEは,安定した高性能リチウム酸素電池を可能にするために有望な電解質です.
  • この進歩は,電解質の設計とLOB技術の進歩のための新しい可能性を提供します.