通过兴奋剂减轻了溶解和改善了LiNi0.5Mn1.5O4的循环稳定性,通过兴奋剂减轻了溶解和改善了LiNi0.5的循环稳定性
Jing-Zhe Wan1, Chao Zhang1, Liang Gao1
1State Key Laboratory of Synergistic Chem-Bio Synthesis, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, P. R. China.
Chemistry (Weinheim an der Bergstrasse, Germany)
|February 6, 2026
概括
兴奋剂稳定了LiNi$_{0.5}$Mn$_{1.5}$O$_{4}$ (LNMO) 结构,显著改善了下一代离子电池 (LIB) 的正极材料性能. 这种增强解决了容量色和金属离子溶解的问题,这对于实际的电池应用至关重要.
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:
- 斯宾尼尔LiNi_{0.5}$Mn_{1.5}$O_{4}$ (LNMO) 是高能离子电池 (LIB) 的一个有前途的阴极.
- 由于过渡金属离子溶解和容量色,LNMO面临着挑战,这阻碍了其广泛使用.
研究的目的:
- 提高LNMO的电化学性能和结构稳定性.
- 研究 (Zn) 兴奋剂对LNMO阴极材料的影响.
主要方法:
- 合成Zn-doped LNMO (Zn-LNMO) 阴极材料的合成.
- 在LIBs中对Zn-LNMO的电化学循环和性能评估.
- 对结构稳定性和Mn溶解抑制的分析.
主要成果:
- 兴奋剂稳定了LNMO结构中的16c和8a位点.
- 在循环过程中,Zn-LNMO表现出明显抑制的Mn溶解.
- 在1°C的1000个循环后,Zn-LNMO阴极保持了81.2%的容量,电压衰变最小 (0.06 mV/循环).
结论:
- 原子工程 Zn 兴奋剂是一种有效的策略,用于改善 LIBs 的 LNMO 阴极性能.
- 这种兴奋剂方法提高了结构强度和电化学稳定性.
- 这些发现为设计用于高性能能量存储的先进阴极材料提供了指导方针.
相关概念视频
Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry
552
Orally administered drugs primarily enter the systemic circulation via passive diffusion through the intestinal membranes. The drug's absorption is influenced by drug stability in the gastrointestinal GI tract, membrane permeability, the surface area available for absorption, luminal drug concentration, and residence time in the lumen. Drug permeability can be enhanced by adjusting the lipophilicity, polarity, or molecular size of the drug, promoting its passive transport across intestinal...
552
Nuclear Stability
23.3K
Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together...
To hold positively charged protons together...
23.3K
RNA Stability
35.8K
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...
35.8K
The Born-Haber Cycle
25.5K
Lattice Energy
25.5K
What are Biogeochemical Cycles?
39.6K
The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.
39.6K
The Water Cycle
28.7K
The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living processes, the cycling of water is extremely important to ecosystem dynamics.
28.7K


