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相关概念视频

Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

41.5K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
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Formation of Complex Ions03:45

Formation of Complex Ions

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A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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Electrodeposition01:08

Electrodeposition

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Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
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相关实验视频

Updated: Jun 27, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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通过在分离器上建立牺牲层来形成LiF丰富的固体电解质相间形成.

Huding Jin1,2, Seonmi Pyo3, Harim Seo4

  • 1Institute of Chemical Processes, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, Republic of Korea.

Small (Weinheim an der Bergstrasse, Germany)
|May 3, 2024
PubMed
概括

分离器上的一种新型化自组装单层 (FSL) 涂层稳定了固体电解质相间层 (SEI). 这通过控制离子流量来提高金属电池的安全性和寿命.

关键词:
金属阳极是一种金属阳极.富有生命力的SEI.祭祀层是一种牺牲层.自己组装的单层单层.固体电解质相间 (SEI) 阶段

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In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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相关实验视频

Last Updated: Jun 27, 2025

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05:33

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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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
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 稳定的固体电解质间相 (SEI) 形成对于金属电池 (LMB) 的安全性和寿命至关重要.
  • 控制阳极/电解质接口上的Li+行为是稳定的SEI形成的关键,但由于Li金属阳极 (LMA) 的反应性而具有挑战性.

研究的目的:

  • 开发一种先进的方法,在LMB中创建一个稳定的SEI层.
  • 通过接口工程来改善Li+动态和LMA稳定性.

主要方法:

  • 在波伊米特涂层聚乙烯 (BPE) 分隔器上涂上牺牲性化自组装单层 (FSL) 层.
  • 调查FSL对Li+的亲和力,以促进快速形成富含LiF的SEI.
  • 全面验证SEI生成和Li+动态控制的机制.

主要成果:

  • 在细胞生产和早期循环过程中,FSL涂层促进了富含LiF的SEI层的快速形成.
  • 这种初始稳定的SEI促进了均的Li+流量,增强了LMA的稳定性.
  • 用FSL处理的BPE分离器显著改善了电池的整体寿命.

结论:

  • 用FSL处理的BPE分离器有效控制Li+动态,从而形成一个稳定的SEI层.
  • 这种接口控制策略解决了LMA的关键挑战,为储能进步做出了重大贡献.
  • 这项研究强调了接口工程对于高性能电池中稳定的SEI形成的重要性.