适用于离子电池的高效分离器容量补偿策略
Yue Mao1, Chaoyi Zhou2, Haochen Gong1
1School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China.
Small (Weinheim an der Bergstrasse, Germany)
|July 25, 2023
概括
一个新的分离器容量补偿策略解决了离子电池 (SIB) 的初始容量损失. 这种方法通过提供额外的离子来提高能量密度,从而改善储能和电动汽车的SIB性能.
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:
- 离子电池 (SIB) 由于的丰富性,为离子电池 (LIB) 提供了一个可持续的替代品.
- 在SIB中,由于固体电解质接口 (SEI) 层中不可逆转的离子被困造成的初始容量损失 (ICL) 阻碍了它们的实际应用.
研究的目的:
- 引入和验证一个隔离器容量补偿策略,以减轻SIB中的ICL.
- 提高SIB的初始可逆特定容量和整体能量密度.
主要方法:
- 集成在分离器中的容量补偿器在阴极的高切断电压以下氧化,释放离子.
- 该策略在NaNi1/3Fe1/3Mn1/3O2 (NMFO) 和Na3V2 (PO4) 的完整细胞中进行了测试.
主要成果:
- 该策略证明了适应当前生产的适应性,保持了长周期寿命,并允许控制前化.
- 在NMFO水下水下HC电池中实现了18.2%的补偿容量比率.
- 在NVP水水HC电池中,初始可逆的特定容量从61.0mAhg-1增加到83.1mAhg-1.
结论:
- 分离器容量补偿策略有效地补偿了SIB中的ICL.
- 这种方法是普遍的,为提高离子电池的能量密度提供了一个有希望的新视角.
相关概念视频
Ion Exchange
622
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
622
Batteries and Fuel Cells
27.7K
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...
27.7K
Ionic Strength: Effects on Chemical Equilibria
1.5K
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...
In this solution, the primary...
1.5K
Optimizing Chromatographic Separations
436
Optimizing chromatographic separations is crucial for obtaining clean separations in a minimum amount of time. Optimization is required for several factors, including kinetic effects related to band broadening, plate height, capacity factor, and separation factor.
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
436
Capillary Electrophoresis: Applications
436
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,...
436
Electrolysis
26.7K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.7K


