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関連する概念動画

Metallic Solids02:37

Metallic Solids

20.5K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.5K
Interphase00:54

Interphase

212.2K
The cell cycle occurs over approximately 24 hours (in a typical human cell) and in two distinct stages: interphase, which includes three phases of the cell cycle (G1, S, and G2), and mitosis (M). During interphase, which takes up about 95 percent of the duration of the eukaryotic cell cycle, cells grow and replicate their DNA in preparation for mitosis.
212.2K
Interphase00:56

Interphase

8.5K
The cell cycle occurs over approximately 24 hours (in a typical human cell) and in two distinct stages: interphase, which includes three phases of the cell cycle (G1, S, and G2), and mitosis (M). During interphase, which takes up about 95 percent of the duration of the eukaryotic cell cycle, cells grow and replicate their DNA in preparation for mitosis.
Phases of Interphase
Following each period of mitosis and cytokinesis, eukaryotic cells enter interphase, during which they grow and replicate...
8.5K
Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

71.4K
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.
71.4K
Alkali Metals03:06

Alkali Metals

24.3K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
24.3K
Batteries and Fuel Cells03:12

Batteries and Fuel Cells

30.8K
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...
30.8K

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リチウム金属アノドの安定した固体電解質インターフェーズの内部ヘルムホルツ平面の調節

Chong Yan1,2, Hao-Ran Li3, Xiang Chen3

  • 1School of Materials Science & Engineering , Beijing Institute of Technology , Beijing 100081 , China.

Journal of the American Chemical Society
|May 24, 2019
PubMed
まとめ

安定した固体電解質インターフェーズ (SEI) 形成の鍵となるのは,電気的二重層を理解することです. この研究はSEIの化学構造と ダブルレイヤ構造を相関させ バッテリーの寿命を向上させます

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Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte
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科学分野:

  • 電気化学
  • 材料科学
  • バッテリー技術

背景:

  • バッテリーの安定性は,固体電解質インターフェーズ (SEI) 層に決定的に依存しています.
  • 電気二重層 (EDL) は,Li金属アノドと電解質のインターフェイスでSEI形成の前にあります.
  • 安全な電池のSEI構造と安定性にはEDL規制を理解することが不可欠です.

研究 の 目的:

  • SEIのインターフェイス化学とナノスケールのリチウム表面吸収EDLを相関させる.
  • 堅固なEDL構造の形成における電解質添加物の役割を調査する.
  • EDLによるSEI形成のメカニズムを解明する.

主な方法:

  • インターフェイス化学の理論的および実験的分析
  • リチウム金属アノド電解質をリチウム窒素 (LiNO3) とフッ素銅 (CuF2) で改造する.
  • 内ヘルムホルツ平面における競争性イオン吸収の調査.

主要な成果:

  • トレースLiNO3とCuF2の添加物は,リチウム金属に堅固なEDL構造を作り出します.
  • Cu-NO3複合体は好ましく吸収され,SEIを形成するために還元されます.
  • 改造された電極は500サイクルで平均99.5%のクーロンビック効率を示している.

結論:

  • この研究は,Li+溶解と電極インターフェース形成の間の関連を確立している.
  • この発見により,耐久性のある高容量バッテリーのための安定したSEI層の設計が可能になった.
  • この研究は,動作するバッテリーのインターフェイス現象に関する基本的な洞察を提供します.