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Extraction: Advanced Methods

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...

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相关实验视频

Updated: May 31, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

使用大π结合分子的选择性接口工程使耐用Zn阳极成为可能.

Feng Zhang¹, Qiangqiang Meng¹, Jia-Wei Qian¹

¹Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, School of Chemistry and Materials Science, CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD), School of Engineering Science, University of Science and Technology of China, Hefei, Anhui, 230026, PR China.

Angewandte Chemie (International ed. in English)

|January 24, 2025

概括

将比利鲁宾等大分子移植到表面,可以防止在水性电池中产生树的生长. 这提高了稳定性和性能,使电池寿命更长.

关键词:

水性离子电池水性离子电池在d频段中部,d频段中心.接口工程接口工程接口工程大的 π 结合分子.首选吸收方式首选吸收方式

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Published on: June 23, 2023

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs

Published on: January 17, 2020

相关实验视频

Last Updated: May 31, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange

Published on: June 23, 2023

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs

Published on: January 17, 2020

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
计算化学的计算化学

背景情况:

水性离子电池在/电解质界面面临着树突生长和副作用的挑战.
这些问题限制了电池的性能和寿命.

研究的目的:

为了研究使用大型 π 结合分子来修改 Zn / 电解质接口.
为了提高水性离子电池的稳定性和性能.

主要方法:

密度函数理论 (DFT) 的计算被用来研究分子在 Zn 表面上的吸附.
实验验证涉及制造和测试修改的阳极和全细胞.

主要成果:

将比利鲁宾 (BR) 等分子移植到 Zn 表面上,可以促进在非(002) 方面的优先吸附.
这导致了界面电荷再分配,一个向上移动的Zn d频段中心,以及改进的H+固定.
经过BR修改的阳极表现出极好的库伦比效率 (99.86%超过4000个周期) 和延长寿命 (在10 mA cm-2下超过1600小时).
使用BR修饰的阳极的全细胞显示出高容量保留 (例如,在1400个循环后86.1%).

结论:

接种大型 π 结合分子可选择性地暴露 Zn(002) 面,调节电双层 (EDL),并向上移动 Zn d 带中心.
这一战略为开发耐用和高性能水性阳极提供了一个有希望的途径.