一种固体双盐塑料晶体电解质,可实现高性能固态离子电池的快速离子转移和稳定的介面
Yang Jiang1, Rui Wang1, Peng Xiong1
1Institutes of Physical Science and Information Technology, Leibniz International Joint Research Center of Materials Sciences of Anhui Province, Anhui University Hefei 230601 China cfz@ahu.edu.cn zlhedu@ahu.edu.cn.
Chemical science
|January 15, 2026
概括
这项研究介绍了一种新的固体双盐塑料晶体电解质,用于固态离子电池 (SIB). 新的电解质增强了离子导电性和接口稳定性,使得高性能SIB具有出色的循环和速率能力.
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:
- 固态离子电池 (SIB) 是一个有前途的储能系统.
- 关键的挑战包括低离子导电性和固体电解质的界面兼容性差.
- 开发稳定和导电的固体电解质对于推进SIB技术至关重要.
研究的目的:
- 为高性能SIBs开发一种新的固体双盐塑料晶体电解质 (PCE).
- 为了增强固态电解质中的离子导电性和界面稳定性.
- 为了使SIB具有高压正极和高效阳极的稳定运行.
主要方法:
- 使用苏奇尼尼特 (SN),乙烯碳酸盐 (FEC),NaClO4和NaBF4.4制造固体PCE.
- 研究FEC和BF4-之间的协同氧化还原反应,以形成保护性间相.
- 电解质性质的表征,包括离子导电性,电压耐受性和界面兼容性.
- 用各种阴极 (Na3V4(PO4) 3,普鲁士白,Na3V2(PO4) 2F3) 和阳极 (硬碳) 材料对SIB进行电化学测试.
主要成果:
- 开发的双盐PCE具有3.79mS cm-1.的离子导电性.
- 形成了一个强大的,富含F和B的介面相,增强了接口稳定性,并使高压耐受性 (≥4.75V) 成为可能.
- 使用PCE的SIB表现出极好的循环稳定性 (>2500循环),高特异容量 (163.9 mAh g-1),以及优异的速率性能 (高达60C).
- 一个完整的细胞 (硬碳Na3V4PO4)3) 在10°C下保持稳定的循环,持续超过100个循环.
结论:
- 固体双盐PCE有效地解决了SIB中低离子导电性和差的接口兼容性的局限性.
- 电解质组件的协同效应导致提高了电化学性能和稳定性.
- 这项工作突出了开发的PCE在实际,高性能固态离子电池应用中的潜力.
相关概念视频
02:42Ionic Crystal Structures
16.8K
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...
16.8K
02:48Ionic Bonding and Electron Transfer
48.6K
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.
48.6K
02:54Molecular and Ionic Solids
19.9K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
19.9K
01:17Ion Exchange
1.1K
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...
1.1K
00:42Ionic Bonds
127.8K
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...
127.8K
01:19Ionic Strength: Effects on Chemical Equilibria
2.5K
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...
2.5K