相关实验视频
Updated: Feb 5, 2026

08:43
Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
Published on: October 27, 2018
18.8K
在超高单晶LiNi0.90Co0.05Mn0.05O2中构建一个稳定接口,通过长时间的盐路线
Congcong Li1, Wenhai Ji2, Dongqing Xu1
1College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, P. R. China.
Small methods
|February 3, 2026
概括
研究人员开发了一种新的单晶丰富的分层氧化物阴极材料 (NCM90-S),具有稳定的岩盐表面层. 这一创新抑制了微裂的形成,大大改善了下一代电池的容量保留.
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:
- 富含的多层氧化物正极材料 (富含的NCM) 对于电动汽车至关重要,因为它们的容量高,成本低.
- 电化学循环导致丰富的NCM中的相位过渡和晶格扭曲,导致微裂和性能降低.
- H2-H3转化是一个关键的有害相位过渡,影响富含Ni的NCM稳定性.
研究的目的:
- 开发一种超高正极材料,提高稳定性和循环性能.
- 调查一层现场稳定的岩盐层对丰富的NCM的影响.
- 为了抑制电化学循环期间的异构晶格扭曲和微裂纹形成.
主要方法:
- 合成单晶LiNi0.9Co0.05Mn0.05O2 (NCM90-S) 与一个在位的NiO岩盐表面层.
- 与多晶NCM90-P相比,NCM90-S的电化学循环和性能测试.
- 在长时间循环后分析结构稳定性和容量保留.
主要成果:
- 在现场的NiO岩盐层有效地保护正极材料免受电解质接触.
- 单晶NCM90-S,具有分散的初级颗粒,避免了异性压力变化.
- 与NCM90-P相比,NCM90-S在1C下经过300个循环后显示出更好的容量保留 (80.2%与60.3%相比),超过NCM90-P.
结论:
- 开发的NiO岩盐表面层有效地稳定了超高阴极材料.
- 单晶设计与保护层相结合,显著抑制了微裂纹的形成,并提高了循环寿命.
- 这种方法为改善电动汽车下一代电池性能提供了一个有希望的策略.
相关概念视频
Determining the pH of Salt Solutions
48.2K
The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution. In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than 7. For...
48.2K
Routes of Persuasion
68.7K
Persuasion is the process of changing our attitude toward something based on some kind of communication. Much of the persuasion we experience comes from outside forces. How do people convince others to change their attitudes, beliefs, and behaviors? What communications do you receive that attempt to persuade you to change your attitudes, beliefs, and behaviors?
68.7K
Ionic Crystal Structures
17.1K
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...
17.1K
Responses to Salt Stress
14.6K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
14.6K
BIBO stability of continuous and discrete -time systems
930
System stability is a fundamental concept in signal processing, often assessed using convolution. For a system to be considered bounded-input bounded-output (BIBO) stable, any bounded input signal must produce a bounded output signal. A bounded input signal is one where the modulus does not exceed a certain constant at any point in time.
To determine the BIBO stability, the convolution integral is utilized when a bounded continuous-time input is applied to a Linear Time-Invariant (LTI) system....
To determine the BIBO stability, the convolution integral is utilized when a bounded continuous-time input is applied to a Linear Time-Invariant (LTI) system....
930
RNA Stability
35.7K
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
35.7K

