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相关概念视频

Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

2.6K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

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The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...
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Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.8K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
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Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

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Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
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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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相关实验视频

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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一个基于链交叉连接器的网络固体聚合物电解质,用于全固态金属电池.

William R Fullerton1, Haoruo Liu2, David N Agyeman-Budu3

  • 1Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States.

ACS applied energy materials
|September 26, 2025
PubMed
概括

这项研究引入了一种新的固体聚合物电解质 (SPE),用于更安全的全固体金属电池 (SMB). 新的SPE表现出卓越的机械强度和树抗性,在电池循环中实现了创纪录的性能.

关键词:
网络聚合物阴解体的聚合物.网络固体聚合物电解质 电解质金属电池 金属电池固体聚合物电解质的电解质.固态电池是一种固态电池.

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
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相关实验视频

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Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
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科学领域:

  • 材料科学 材料科学 材料科学
  • 电化学 电化学 电化学
  • 聚合物科学 聚合物科学

背景情况:

  • 全固态金属电池 (SMB) 提供了比离子替代品更好的安全性和可持续性.
  • 金属的高反应性导致树岩的形成,阻碍了中小企业的性能和安全.
  • 固体聚合物电解质 (SPEs) 对于开发安全高效的全固态电池至关重要.

研究的目的:

  • 为所有固态中小企业开发一个强大而高性能的SPE.
  • 为了应对树增长的挑战,并提高电池循环稳定性.
  • 研究SPE的机械性能与其电化学性能之间的关系.

主要方法:

  • 合成了一种基于交叉链接器的新型链网络SPE.
  • 描述了机械性能,包括破裂时的延长和性.
  • 评估的离子导电性和电化学性能在NADAXYSPE NADAXYNA对称电池和带有P2型阴极的全电池.

主要成果:

  • 该SPE具有出色的机械性能:在断裂时延长181%,性为1.6MJm-3.
  • 在0.5 mA cm-2的对称细胞中实现了 ~4248 h的显著循环寿命.
  • 在1C的700个周期后,全电池保持了80.6%的容量,为基于SPE的全固态中小企业创造了新纪录.

结论:

  • 开发的SPE对全固态中小企业具有卓越的机械和电化学性能.
  • 链交叉连接器网络有效地抑制了 dendite 的形成.
  • 这项工作为更安全,高性能和可持续的金属电池铺平了道路.