負の曲線ナノゲンとその共振ネットワークの充電
Yiqun Zhang1, Yikun Zhu2, Danni Lan3
1Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
Journal of the American Chemical Society
|March 25, 2021
まとめ
研究者らは,負の曲線ナノゲレンから新型の多孔性炭素材料を合成した. これらの材料は,高性能リチウムイオン電池の陽極材料として有望です.
科学分野:
- 材料科学
- ナノテクノロジー
- 有機化学
背景:
- ナノゲノムのような 負のカーブした炭素アロトロプは 独特の電子と構造的特性を有しています
- これらの材料のボトムアップ合成方法の開発は,その応用にとって極めて重要です.
研究 の 目的:
- 新しい負のカーブした炭素アロトロプを作るためのボトムアップアプローチを探求する.
- これらの合成材料の性質と潜在的応用を調査する.
主な方法:
- アルカリ金属によるオクタベンゾ[8]サーキュレンの段階的な化学還元.
- 低炭素ペンタニウムを分析するX線結晶学
- テトラブロモ誘導体のポリメリゼーションのためのニッケル媒介ヤマモト結合器.
主要な成果:
- 独特で高度に減少した炭化水素ペンタニオンの形成
- ナノゲノムの共性ネットワークから,多孔性の炭素豊富な物質を合成する.
- この材料は高表面積 (732 m2 g−1) を有し,リチウムイオン電池 (830 mAh·g−1) の有効な陽極として機能する.
結論:
- 合成された共性ネットワークは,負のカーブされた炭素アロトロプの重要な構造および機能特性を有する.
- 先進的な炭素材料の設計に 新しい経路を提供しました
- この素材は次世代のエネルギー貯蔵の 可能性を示しています
関連する概念動画
02:18Network Covalent Solids
15.4K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
15.4K
02:42Formal Charges
37.7K
In some cases, there are seemingly more than one valid Lewis structures for molecules and polyatomic ions. The concept of formal charges can be used to help predict the most appropriate Lewis structure when more than one reasonable structure exists.
37.7K
02:19Lewis Structures and Formal Charges
18.1K
Lewis symbols can be used to indicate the formation of covalent bonds, which are shown in Lewis structures—drawings that describe the bonding in molecules and polyatomic ions. The periodic table can be used to predict the number of valence electrons in an atom and the number of bonds that will be formed to reach an octet. Group 18 elements, such as argon and helium, have filled electron configurations and thus rarely participate in chemical bonding. However, atoms from group 17, such as...
18.1K
02:42Valence Bond Theory
10.0K
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...
10.0K
01:15Charging Conductors By Induction
8.6K
The Earth is a good conductor of electricity, and it is so big that it can be considered an infinite source or sink of charges. It can easily exchange charges with any matter.
Generally, conductors like metals do not allow any excess charge to be present on them. Any excess charge added to metals easily flows away, for example, when a metal is placed on the Earth. This process is called earthing.
However, conductors can be charged by a process called induction. For example, consider charging a...
Generally, conductors like metals do not allow any excess charge to be present on them. Any excess charge added to metals easily flows away, for example, when a metal is placed on the Earth. This process is called earthing.
However, conductors can be charged by a process called induction. For example, consider charging a...
8.6K