基于硫烯胺的单离子导电性多孔有机聚合物电解质,用于提高固态电池的性能
Pin-Jyun Chen1, Jaturon Kumchompoo2, Bo-Lin Chen1
1Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan.
ACS applied materials & interfaces
|February 10, 2026
概括
研究人员开发了一种新的单离子导电聚合物电解质 (Li-SSP),用于更安全,更持久的离子电池. 这种先进的材料抑制了不必要的反应,提高了电池的性能和循环寿命.
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
- 聚合物化学 聚合物化学
背景情况:
- 固态电解质对于下一代离子电池至关重要,但度极化会导致相间增长,限制电池寿命.
- 现有的电解质受到阳离子流动性的影响,导致离子电池的界面不稳定性和周期寿命缩短.
研究的目的:
- 设计和合成一种基于硫胺的新型单离子导电性多孔有机聚合物 (Li-SSP) 电解质.
- 为了抑制离子移动性和增强Li+运输,以提高界面稳定性和电池性能.
主要方法:
- 通过Sonogashira合合成的Li-SSP,以FTIR和BET分析为特征.
- 复合电解质 (LiTFSI/PVDF-HFP/Li-SSP) 制造并测试了离子导电性和Li+转移数.
- 电化学性能通过使用Li红色Li对称电池和LiFePO4半电池进行评估;通过SEM,TEM和XPS进行界面分析.
主要成果:
- -SSP具有中孔/微孔结构 (271 m2/g表面积),具有固定离子,用于连续的+导电.
- 复合电解质显示高离子导电率 (4.04 × 10−4 S cm−1在30°C) 和高Li+转移数 (0.70).
- 实现了稳定的涂/剥离 (>400小时),高容量 (148.1mAhg-1在0.2°C),以及出色的循环稳定性 (在300个循环后保持96.1%).
结论:
- -SSP电解质的合理设计有效地抑制了度极化,并提高了电化学稳定性.
- 开发的Li-SSP复合电解质提供了强大的界面兼容性,降低了界面阻力和延长了循环寿命.
- 这项工作为安全和耐用的固态离子电池提供了有前途的途径.
更多相关视频
相关概念视频
03:12Batteries and Fuel Cells
31.0K
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...
31.0K
02:21Electrolyte and Nonelectrolyte Solutions
72.1K
Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
72.1K
02:54Ions as Acids and Bases
26.6K
Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
26.6K
03:08Electrolytes: van't Hoff Factor
37.0K
Colligative Properties of Electrolytes
The colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one...
The colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one...
37.0K
02:34Polymers
41.1K
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
41.1K
02:54Molecular and Ionic Solids
20.2K
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...
20.2K