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相关概念视频

Precipitate Formation and Particle Size Control01:16

Precipitate Formation and Particle Size Control

In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
Washing, Drying, and Ignition of Precipitates00:52

Washing, Drying, and Ignition of Precipitates

After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...

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相关实验视频

Updated: May 26, 2026

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
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为全固态金属电池量身定制硫化物颗粒大小

Ziqi Zhang1, Changqing Jing2, Jingming Yao3

  • 1Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China.

Advanced materials (Deerfield Beach, Fla.)
|January 9, 2026
PubMed
概括

在全固态金属电池 (ASSLB) 中优化硫化物固体电解质 (SSE) 颗粒大小可以提高离子导电性. 控制的研磨和特定的颗粒大小比率 (D50,D90) 产生更高的容量,速度能力和循环能力.

关键词:
金属阳极是一种金属阳极.丰富的阴极是有的所有固态电池都是固态电池.亚尔吉罗石是一种石.颗粒大小 颗粒大小硫化物是固体电解质的电解质.

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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
  • 电池技术 电池技术

背景情况:

  • 精确控制硫化物固体电解质 (SSE) 颗粒大小对于复合电极中的有效的离子导电网络至关重要.
  • 全固态金属电池 (ASSLB) 需要优化SSE以提高性能.

研究的目的:

  • 系统地研究SSE粒子大小分布 (D10,D50,D90) 对ASSLB性能的影响.
  • 为了建立SSE颗粒工程在复合阴极的定量指导原则.

主要方法:

  • 对Li6PS5Cl SSE进行控制的机械研磨,以达到特定的颗粒大小分布.
  • 对具有不同SSE颗粒大小的ASSLB进行电化学测试 (容量,速率能力,循环性).
  • 微结构分析以将粒子配置与离子导电网络形成相关联.

主要成果:

  • 最佳的SSE颗粒大小组成导致0.25C的可逆容量为202.2 mAh/g.
  • 实现了优越的速率能力 (76%的容量保留在5C/0.25C) 和可循环性 (在4000个循环后在5C80%).
  • 在特定的阴极与SSE颗粒大小比率 (7.3 ≤ D50Cathode/D50SSE和2.0 ≤ D90Cathode/D90SSE ≤ 3.5) 下形成的层次化的离子导网.

结论:

  • 优化SSE粒子大小工程对于高性能ASSLBs至关重要.
  • 精细的SSE颗粒填补了阴极间隙,而中型颗粒则促进了离子运输.
  • 颗粒大小比率的偏差会对接口接触和离子运输通路产生负面影响.