通过/联对离子电池的/联,P2/O3型层状氧化物阴极的稳定循环性能
Xiaobao Hou1,2, Meijing Xiao3, Xin Chen1,2
1Shanghai Key Laboratory of Electric Power Materials Protection and New Materials, Shanghai Electric Power University, Shanghai, 201306, China.
Chemistry, an Asian journal
|June 10, 2025
概括
研究人员开发了一种新的P2/O3复合材料,用于离子电池的高材料. 这种基于的阴极材料增强了稳定性和容量,为储能应用提供了一个有前途的替代方案.
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) 是离子电池的经济有效的替代品.
- 基于的分层氧化物 (O3和P2类型) 显示出高容量的潜力,但稳定性不佳.
- 由于阴极材料的局限性,SIB的实际应用受到阻碍.
研究的目的:
- 为SIB阴极设计和合成一种新型的复合高材料.
- 为了克服传统的基于的氧化物的稳定性和容量限制.
- 为了提高离子电池的电化学性能.
主要方法:
- 一种P2/O3型复合高材料的合成:P2/O3-Na$_{0.75}$Li$_{0.05}$Cu$_{0.10}$Fe$_{0.30}$Mn$_{0.50}$Sn$_{0.05}$O$_{2}$.
- 加入Li$^{+}$以提高离子导电性和离子氧化还原激活.
- 纳入Sn$^{4+}$以防止电费转移并提高结构完整性.
- 电化学测试用于评估特定容量,速率能力和循环稳定性.
主要成果:
- 合成的P2/O3复合材料在0.1C时达到110mAh的特定容量.
- 在3C的高速度下保持了58 mAh g$^{-1}$的容量.
- 在500个循环后,观察到80.91%的优异容量保留,表明稳定性增强.
结论:
- 这种新型的高性复合材料为优化基于的氧化物提供了一种新的战略.
- 该材料在离子电池应用中表现出更好的性能和稳定性.
- 这项工作为开发用于储能的先进阴极材料提供了宝贵的见解.
相关概念视频
02:48Ionic Bonding and Electron Transfer
46.6K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
46.6K
03:12Batteries and Fuel Cells
24.1K
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...
24.1K
01:21DC Battery
1.7K
A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
1.7K
01:28Ionic Association
216
The ionic association is the association of oppositely charged ions in an electrolyte solution to form ion pairs. Bjerrum defined ion pairs as two oppositely charged ions whose electrostatic attraction exceeds the thermal energy of the system, typically expressed as 2kT. Electrostatic attraction depends on ionic charge, separation distance, and the dielectric constant of the medium. Thermal energy, represented by kT, reflects the tendency of ions to move independently due to molecular motion.
216
01:24Electrochemical Systems
179
Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution,...
179
01:30The Electrical Double Layer
241
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
241