基于连续极化性的铁酸盐和石墨的分离,使用介电离子粒子分离器
Xiaolei Chen1,2, Hao Jiang3,4, Fei Du5
1College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China.
Langmuir : the ACS journal of surfaces and colloids
|January 7, 2025
概括
这项研究介绍了一种高效的电介导 (DEP) 方法,用于从已耗尽的离子电池 (LIB) 中分离铁酸盐 (LFP) 和石墨. 新型DEP分离器实现了80%以上的LFP分离效率,提供了一个可持续的回收解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 使用过的离子电池 (LIB) 的回收是非常重要的,因为对有价值材料的需求日益增加.
- 目前的LIB回收方法是能源密集的,昂贵的,低效的,对环境造成污染.
研究的目的:
- 提出一种高效和环保的基于电介电泳 (DEP) 的方法,将铁酸盐 (LFP) 和石墨从LIB"黑质量"中分离出来.
- 开发一个定制的微粒子分离器,用于高通量连续分离.
- 为可持续的LIB恢复提供理论基础.
主要方法:
- 开发了一种自定义的微粒子分离器,使用过电泳 (DEP).
- 构建了一个整合电场和流场的理论模型来预测粒子行为.
- 执行了粒子分离的数值模拟和实验验证.
- 调查了操作参数 (电压,流量,外与料比率) 的影响.
主要成果:
- 在10.8mL/分钟流量和100V时,为LFP实现了超过80%的分离效率.
- 在数值模拟和实验结果之间显示出良好的一致性.
- 确定了高分离效率和颗粒纯度的最佳操作参数.
- 探索了分离其他金属氧化物混合物的潜力.
结论:
- 基于DEP的微粒子分离器为LIB回收提供了一个高效,可持续和低能耗的解决方案.
- 该研究提供了一个验证的理论框架,用于设计先进的LIB分离过程.
- 这种方法有可能显著改善电池回收的环境足迹.
相关概念视频
Dielectric Polarization in a Capacitor
4.6K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
4.6K
Potential Due to a Polarized Object
362
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
362
Capillary Electrophoresis: Applications
330
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
330
Electrophoresis: Overview
1.4K
Electrophoresis is a powerful analytical separation technique that relies on the differential migration of charged species when subjected to an electric field. The core strength of electrophoresis lies in its ability to separate high-molecular-weight species in complex mixtures. It has found widespread use in biochemistry, molecular biology, and analytical chemistry, allowing the separation of compounds like amino acids, nucleotides, carbohydrates, and proteins with excellent resolution.
There...
There...
1.4K
Ion-Exchange Chromatography
348
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
348
Capillary Electrophoresis: Instrumentation
180
Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
180


