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相关概念视频

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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Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

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Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
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Solvents01:12

Solvents

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A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
A...
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Ionic Strength: Effects on Chemical Equilibria01:19

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The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary...
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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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用于高性能金属电池的三重功能的性溶剂添加剂.

Wenqiang Fang1, Zuxin Wen1, Fenglin Wang1

  • 1School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha 410083, China.

Science bulletin
|February 29, 2024
PubMed
概括
此摘要是机器生成的。

一种新的N-甲基胺 (NmAc) 和LiNO3添加剂增强了高压金属电池 (LMB) 的碳酸盐电解质. 这提高了稳定性,降低了腐蚀,并使Li Radius NCM622电池的性能更好.

关键词:
欧性溶剂添加剂 欧性溶剂添加剂接口化学 接口化学金属电池的电池是金属的电池.PF(5) 捕捉器使用溶解结构是一个溶解结构.

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科学领域:

  • 电化学 电化学 电化学
  • 材料科学 材料科学 材料科学
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 高压金属电池 (LMB) 需要稳定的碳酸盐电解质.
  • 传统的电解质遭受不稳定的介面和腐蚀性副产品,如酸 (HF).

研究的目的:

  • 开发一种具有三重功能的性溶剂添加剂,以提高碳酸电解质的稳定性和对LMBs的兼容性.
  • 为了应对传统电解质中不稳定的电极接口和高频生成的挑战.

主要方法:

  • 在碳酸盐电解质中将N-甲基胺 (NmAc) 与LiNO3结合为欧性溶剂添加剂.
  • 调查Li+溶解结构,涂层形态以及与PF5.5的相互作用.
  • 评估阴极电解质间相 (CEI) 特性和过渡金属溶解.
  • 电化学性能测试的基基LiNi0.6Co0.2Mn0.2O2 (NCM622) 电池的电化学性能测试.

主要成果:

  • NmAc显著改善了LiNO3的溶解性,调节了Li+溶解,并促进了密集的Li.
  • NmAc有效地与PF5复合,减轻HF生成并减少电解质腐蚀性.
  • 优化的CEI层抑制了结构降解和过渡金属溶解.
  • 基基NCM622细胞表现出优异的循环可逆性和速度能力与修改过的电解质.

结论:

  • 欧性溶剂添加剂,特别是NmAc与LiNO3,为稳定高压LMB中的碳酸盐电解质提供了一个有希望的策略.
  • 这种方法提高了电解质兼容性,减少了降解,并提高了电池性能.
  • 这些发现为推进高压LMB的实际应用提供了理由.