通过聚合物进化诱导的动态阳极/阴极-电解质接口,用于耐用金属电池
Wanru Lin1, Kang Zhou1, Chao Yang1
1State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
Journal of the American Chemical Society
|February 11, 2026
概括
一个新的人工接口 (MAF) 稳定了金属电池,同时防止了树的生长和阴极粒子的扭曲. 这种共聚合物接口增强了对立体Li和对称Li的LFP/NCM811细胞的循环稳定性.
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
- 电池技术 电池技术
背景情况:
- 固体电解质接口 (SEI) 工程对于金属电池 (LMB) 的循环性至关重要.
- 需要同时稳定阳极和阴极以克服性能限制.
研究的目的:
- 为LMBs开发一个双功能的人工接口,它既解决了Li树突的增长,也解决了阴极粒子的扭曲.
- 调查电池循环期间接口的动态演变和贡献.
主要方法:
- 无水化物 (MA) 和六布烯酸盐 (HFA) 的共聚合,在阳极上创建MAF接口.
- 在电化学测试中,对立的基体细胞,基体LiFePO4 (LFP) 细胞和基体LiNi0.8Co0.1Mn0.1O2 (NCM811) 细胞进行了测试.
主要成果:
- MAF层形成了一个混合SEI,内在有机,外在是聚合物,促进了均的Li+涂层.
- 在MAF中的化寡合物动态成熟LiF丰富的阴极电解质接口 (CEI).
- 经过900小时的循环,对称的Li PaddyLi单元; Li PaddyLi LFP和Li PaddyLi NCM811单元分别在1500和350个循环后显示了90.2%和80.6%的容量保留.
结论:
- 在LMB中,MAF接口有效地抑制了Li树突的生长和阴极降解.
- 动态接口的演变是提高高能LMB的长期循环稳定性和性能的关键.
相关概念视频
Batteries and Fuel Cells
31.1K
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...
31.1K
Electrolyte 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
Alkali Metals
25.0K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Table 1: Properties of the alkali metals
25.0K
The Evidence for Evolution
48.4K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
48.4K
Electrolytes: van't Hoff Factor
37.1K
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...
37.1K
Convergent Evolution
33.1K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
33.1K


