具有铁电电解质的可持续固态离子电池
Ângela Freitas1,2,3, Manuela C Baptista1,2,3, Maria Helena Braga1,2,3
1Department of Engineering Physics, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
International journal of molecular sciences
|December 17, 2024
概括
这项研究探讨了简单的固态电池模型,揭示了在放电期间意外的电压增加和沉积. 这些发现为开发先进的固态电池提供了基础的见解.
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
- 固态化学 固态化学
背景情况:
- 固态电池有望提高安全性和能量密度,但面临着重大挑战.
- 复杂性需要研究简化的模型来理解基本的操作原理.
- 这项研究侧重于没有传统电极的细胞,以建立基础知识.
研究的目的:
- 为了研究简化的固态电池配置的电化学行为.
- 了解电流收集器和电解质在开放电路电压中的作用.
- 在不同的条件下探索沉积现象.
主要方法:
- 使用复合电解质和不相似的电流收集器 (Cu/Zn) 的袋式电池的制造和电化学测试.
- 在长时间内测量开放电路电压 (OCV).
- 加入碳感觉,以评估其对细胞性能的影响.
- 对异质连接的初始模拟,以模拟接口现象.
主要成果:
- 一个Cu/Na2.99Ba0.005ClO复合物在一个纤维素/Zn袋细胞中,最初的OCV为1.10V,在120天后增加到1.13V.
- 添加碳料改变了OCV到0.85V,后来在95天后升至1.20V.
- 最初的模拟和实验证实了在室温下放电时在电流收集器上形成双极和沉积,但不是在40°C时.
结论:
- 简化的固态电池模型展示了复杂的电化学行为,包括意想不到的电压增加.
- 在负电流收集器上沉积是室温下放电过程中的一个关键过程.
- 这些基础研究对于指导功能固态电池的设计至关重要.
更多相关视频
相关概念视频
03:12Batteries and Fuel Cells
27.0K
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...
27.0K
01:28Induced Electric Dipoles
4.2K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
4.2K
02:54Molecular and Ionic Solids
16.9K
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...
16.9K