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Oxidation Numbers03:14

Oxidation Numbers

43.3K
In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules.
43.3K
Hydrogen Bonds00:26

Hydrogen Bonds

134.8K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
134.8K
Hydrogen Bonds01:04

Hydrogen Bonds

15.2K
A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
15.2K
RNA Stability01:53

RNA Stability

35.8K
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
35.8K
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

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Oxidation–Reduction Reactions
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Chemistry of Carbohydrates03:25

Chemistry of Carbohydrates

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Carbohydrates are an essential part of the diet in humans and animals. Grains, fruits, and vegetables are natural sources of carbohydrates that provide energy to the body, particularly through glucose, a simple sugar that is a component of starch and an ingredient in many staple foods. The stoichiometric formula (CH2O)n, where n is the number of carbons in the molecule represents carbohydrates. In other words, the ratio of carbon to hydrogen to oxygen is 1:2:1 in carbohydrate molecules. This...
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Soft Lithographic Functionalization and Patterning Oxide-free Silicon and Germanium
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Soft Lithographic Functionalization and Patterning Oxide-free Silicon and Germanium

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耐久性の高い水素化学による微小サイズのシリコン酸化物の安定化

Kai Zhang1,2, Huan Pang1,3, Zaichun Liu1

  • 1Department of Applied Chemistry, School of Chemistry and Materials Science, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, China.

Angewandte Chemie (International ed. in English)
|February 15, 2026
PubMed
まとめ

マイクロサイズの酸化シリコン (μSiOx) アノードは,高エネルギーリチウム電池の有望性を示しています. 水素化学は,固体電解質インターフェーズ (SEI) を安定させ,アノドの安定性と性能を向上させ,実用的な用途に使用します.

キーワード:
大気保護のための大気保護装置水素化学 水素化学インターフェース規制 インターフェース規制シリコンベースの材料

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関連する実験動画

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Soft Lithographic Functionalization and Patterning Oxide-free Silicon and Germanium

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Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
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科学分野:

  • 材料科学 材料科学とは
  • 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:

  • マイクロサイズの酸化シリコン (μSiOx) は,低コストと高容量のため,高エネルギーリチウム電池の有望なアノド材料です.
  • μSiOxアノドの固体電解質インターフェーズ (SEI) の不安定さは,不可逆的なリチウム消費と電解質分解につながり,長期の安定性を妨げます.

研究 の 目的:

  • マイクロサイズの酸化シリコン (μSiOx) アノドの固体電解質インターフェーズ (SEI) の安定性を高めるために.
  • リチウム電池のμSiOxアノドの長期サイクル性能と容量保持を改善するために.

主な方法:

  • インタフェースの調節と大気保護のために水素化学の二重機能を活用する.
  • 高度可逆性の水素進化と酸化還元酸化反応を用いて,陽極表面を安定させる.

主要な成果:

  • 1°Cで~1568 mAh g−1の放電容量を達成し,充電容量は1600 mAh g−1.1でした.
  • ~98%のクーロンビック効率で,700mAhg−1.1の充電容量で2000時間の安定したサイクルが実証されています.
  • 3 mAh cm−2.2. の高面積容量で600時間のサイクリング後に~2.93 mAh cm−2の排出容量を維持しました.

結論:

  • 水素化学に基づく戦略は,μSiOxアノドのSEI安定性を効果的に高めています.
  • このアプローチは,高容量μSiOxアノドの安定化のための実行可能な解決策を提供し,リチウム電池での実用的な応用を進めます.