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相关概念视频

Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

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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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Molecular and Ionic Solids02:54

Molecular and Ionic Solids

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Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
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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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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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树突型固体聚合物电解质:高性能基电池的新范式.

Lei Zhang1, Shi Wang1,2,3, Qian Wang4

  • 1School of Materials and Chemical Engineering, Chuzhou University, 1528 Fengle Avenue, Chuzhou, 239099, China.

Advanced materials (Deerfield Beach, Fla.)
|June 3, 2023
PubMed
概括

树突聚合物电解质 (PE) 通过克服传统有机电解质的局限性,为更安全,更高能量的离子电池提供了有希望的解决方案. 它们独特的结构增强了离子导电性和机械性能.

关键词:
树突性聚合物电解质的电解质在安全方面,安全是安全的.固态离子电池 固态离子电池合成化学 合成化学拓结构结构的拓结构.

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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
  • 聚合物化学 聚合物化学

背景情况:

  • 离子电池 (LIB) 由于有机电解质而面临能量密度和安全性的限制.
  • 研究聚合物电解质 (PE) 以提高LIBs的安全性和能量密度.
  • 目前的PE体有较低的离子导电性,机械性能差,电化学窗口狭窄.

研究的目的:

  • 审查树突聚合物电解质 (dPE) 对于高级LIBs的潜力.
  • 探索合成化学如何优化dPE以提高性能.
  • 总结了电池应用的DPE的最新进展和未来前景.

主要方法:

  • 介绍树突聚合物的概念和合成.
  • 分析策略,以平衡dPE中的机械性能,离子导电性和电化学稳定性.
  • 讨论dPE中的离子传输机制和界面相互作用.

主要成果:

  • 在PE中的树突拓导致晶度低,细分流动性高,链纠减少.
  • 定制合成策略可以提高dPE的离子导电性,机械强度和电化学稳定性.
  • dPE显示了高性能离子电池应用的潜力.

结论:

  • 树突PE为克服当前固态电解质的局限性提供了一种新的方法.
  • 对离子运输和界面现象的进一步研究对于优化dPE至关重要.
  • 对于未来更安全,更高效的储能设备,DPE具有显著的前景.