相关实验视频

Updated: May 22, 2025

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

磁场驱动的离子选择性提高了LiF丰富的SEI形成,提高了金属电池在不同温度的性能

Jianli Zhang¹, Zepu Du¹, Yao Wang¹

¹College of Material Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.

ACS applied materials & interfaces

|March 13, 2025

概括

这项研究通过修改酸和离子分离器来提高金属电池的性能,显著提高了商业可行性的稳定性和效率.

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:

金属阳极具有较高的理论容量,但由于体积膨胀,副作用反应和树石形成而面临商业化障碍.
现有的解决方案难以克服电池中金属阳极固有的不稳定性.

研究的目的:

开发一种新的分离器修改策略,以提高金属电池的电化学性能和稳定性.
研究酸,离子和外部磁场在减轻阳极挑战中的作用.

主要方法:

使用酸和CO2+离子对聚烯分离器进行共价修改.
在电池运行过程中应用外部磁场.
对修改过的分离器上的离子吸附 (CO32-和F-) 和由此产生的固体电解质接口 (SEI) 形成的分析.

主要成果:

修改的TA-Co/PP分离器选择性地吸附CO32-离子,同时抑制F-离子吸收,促进富含LiF的SEI.
带有TA-Co/PP分离器和磁场的电池在1 mA cm-2.2的650个周期中实现了90%的库伦比效率.
带有TA-Co/PP分离器的对称电池在60°C和4mA cm-2.2时表现出低极化 (20mV).

结论:

拟议的分离器修改有效地稳定了金属阳极,提高了电池循环寿命和性能.
TA-Co修饰和磁场应用的协同效应为商业化各种温度的高性能金属电池提供了有希望的途径.

关键词:

压制树,抑制树.接口稳定接口稳定离子吸附方式离子吸附方式微磁场是一个微磁场.分离器的修改分离器的修改

更多相关视频

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

$In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries$ 11:25

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries

Published on: November 10, 2014

相关概念视频

Formation of Complex Ions

Formation of Complex Ions

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...

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...