一个渐变的化结构,用于稳定的金属阳极,具有超高速率和超深容量
Gangqiang Peng1, Qianfeng Zheng1, Geng Luo1
1Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, 518060, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|July 12, 2023
概括
在3D电流收集器中,渐变的性结构使沉积均,抑制了金属阳极 (LMA) 中的树生长. 这一突破提高了电池的安全性和性能,为下一代储能铺平了道路.
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:
- 探索三维电流采集器 (3DCC) 的金属阳极 (LMAs),以防止树的生长.
- 挑战包括3DCC内部的电流密度不均和有限的离子传输,冒着树形成和安全问题的风险.
研究的目的:
- 在3DCC中制定一个统一沉积的战略.
- 为了抑制LMAs中的树形成.
- 为了提高金属电池的安全性和循环稳定性.
主要方法:
- 使用低成本的溶液燃烧方法合成渐变结构的氧化加载铜泡 (GSZO-CF).
- 制造和测试Li@GSZO-CF对称细胞.
- 组装和评估Li@GSZO-CF下载器下载LiFePO4 (LFP) 完整电池.
- 在COMSOL模拟中验证沉积行为.
主要成果:
- 渐变的性结构在3DCC内部引起了均的沉积.
- Li@GSZO-CF对称电池实现了超过800个周期的10 mAh cm−2容量在50 mA cm−2.2.
- 完整的电池显示了200个周期,容量为130mAhg-1,1在1C时保持85.5%.
结论:
- 梯度结构的电流收集器有效地抑制了树状石的形成.
- 这种方法为开发高性能和安全的金属阳极提供了一个有前途的战略.
- 这些发现有助于推进下一代电池技术.
相关概念视频
Batteries and Fuel Cells
27.7K
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...
27.7K
Ionic Crystal Structures
14.5K
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...
14.5K
Ionic Bonding and Electron Transfer
41.8K
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.
41.8K
Formation of Complex Ions
23.7K
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...
23.7K


