阳离子调节溶解结构和电极接口向可充电电池
Duo Zhang1, Miao Zhou1, Eslam Sheha2
1School of Chemistry and Chemical Engineering, Shanghai Electrochemical Energy Devices Research Center, Shanghai Jiao Tong University, Shanghai 200240, China.
Nano letters
|March 13, 2025
概括
一种新型的双离子电解质通过实现快速Mg2+运输和稳定的介面相来增强可充电电池 (RMBs). 这一突破为下一代储能提供了更长的寿命和更高的效率.
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:
- 开发高效的电解质对于可充电电池 (RMB) 来说至关重要.
- 单离子电解质往往限制了快速Mg2+运输所需的氧化还原特性.
- 固体/阴极-电解质间相 (SEI/CEI) 稳定性对于人民币的表现至关重要.
研究的目的:
- 设计一种无,双离子电解质,以提高Mg2+的运输能力.
- 研究离子介导溶解在稳定电池间相中的作用.
- 为了证明基于Mg的电池系统的电化学性能提高.
主要方法:
- 使用二三甲硫) 胺和PP14CF3SO3的双离子电解质在diglyme/MOEA溶剂中的配方.
- 电化学表征Mg涂层/脱落,阳极/阴极兼容性和阳极稳定性.
- 测试MgMg,SSMg,Mo6S8Mg和PBAQMg的全细胞.
主要成果:
- 双离子电解质促进了高效的Mg/脱落和阴极兼容性.
- 由于MOEA相互作用,稳定了Mg-阳极SEI,并促进了C-N丰富的CEI形成.
- 在SSMg细胞中达到超过2500小时的延长寿命,平均库伦比效率为98.1%.
- 在Mo6S8Mg细胞中表现出极好的速率性能,在PBAQMg细胞中运行2.8V,容量保留约70%.
结论:
- 拟议的双离子电解质通过离子介导溶解调节显著提高了人民币的性能.
- 这种电解质设计为高性能人民币中先进的电解质工程提供了一个有希望的途径.
- 这些发现为开发下一代基于的储能设备提供了关键的见解.
相关概念视频
Formation of Complex Ions
23.1K
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...
23.1K
Ionic Bonding and Electron Transfer
40.4K
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.
40.4K
Ionic Bonds
117.6K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
117.6K
Batteries and Fuel Cells
26.8K
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...
26.8K
Ionic Crystal Structures
14.0K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.0K
Ion Exchange
518
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...
518


