交联聚合物粘合剂通过协同应力消散和优选SEI形成缓解粉化
Yitong Zhang1, Xiangfei Xu1, Hong Huo1
1Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China.
ACS applied materials & interfaces
|November 12, 2025
概括
新的聚 (?? 烯酸) 共聚物作为阳极的结合剂,提高了电池的性能. 这些交叉连接的结合物增强了机械稳定性和离子传输,解决了阳极电池的关键挑战.
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:
- 阳极具有较高的理论容量,但在循环过程中遭受机械降解和接口不稳定.
- 现有的结合剂往往无法为阳极提供足够的机械支和离子导电性.
研究的目的:
- 为了合成和描述新型的聚 (?? 烯酸) 共聚合物作为阳极的结合剂.
- 通过Ritter反应来研究这些共聚物在现场的交叉链接,以形成强大的结合物.
- 为了评估使用交叉连接粘合剂的阳极的电化学性能.
主要方法:
- 自由基聚合以合成具有和基组的多聚合物 (?? 烯酸) 共聚合物.
- 在现场使用Ritter反应进行交叉链接以形成c-PACH-2结合剂.
- 使用c-PACH-2结合剂对阳极进行电化学测试 (循环,速率能力).
- 密度函数理论 (DFT) 计算和X射线光电子谱学 (XPS) 分析.
主要成果:
- 交联结合剂 (c-PACH-2) 有效地减轻了阳极的体积膨胀和颗粒粉碎.
- 结合剂内增强的Li+扩散通路提高了速率的能力.
- DFT和XPS证实形成了一个稳定的,富含LiF的固体电解质间相 (SEI) 层.
- 在0.2°C的100个循环后,c-PACH-2@Si Padang Padang Li电池表现出67.2%的容量保留.
结论:
- 开发的共价网络绑定器整合了阳极的机械弹性和离子传输.
- 这一战略为制造高性能和耐用的阳极电池提供了一个有前途的方法.
- 该c-PACH-2绑定器解决了阳极技术的关键挑战,为下一代能源存储铺平了道路.
更多相关视频
10:09Fabricating Reactive Surfaces with Brush-like and Crosslinked Films of Azlactone-Functionalized Block Co-Polymers
Published on: June 30, 2018
8.6K
07:01Improved Polydimethylsiloxane (PDMS) Double Casting via Silicone Oil Treatment for Densely Packed Microstructure Replication
Published on: July 18, 2025
1.4K
相关概念视频
Intermolecular Forces in Solutions
30.5K
The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
30.5K
Colloids
17.2K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
17.2K
Energetics of Solution Formation
5.8K
The formation of a solution is an example of a spontaneous process, which is a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
5.8K
Colloidal precipitates
5.7K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
5.7K
Coagulation
1.5K
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
1.5K
Superplasticizers
468
Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
468
