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一种基于氨酸的多孔有机聚合物,用于离子电池阳极
Lihua Guo1, Chunhua Li1, Yougui Zhou1
1School of Science, China University of Geosciences (Beijing), Beijing 100083, P. R. China. shanghong@cugb.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|September 18, 2023
概括
一种基于氨酸的新型多孔有机聚合物 (PcPOP) 作为离子电池阳极表现出色. 它独特的结构增强了间,导致高容量和长期稳定性.
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
- 聚合物化学 聚合物化学
背景情况:
- 多孔有机聚合物 (POPs) 为先进材料应用提供可调节的结构.
- 聚氨酸衍生物因其电子性质和储能潜力而受到探索.
研究的目的:
- 为了合成和表征一种基于甲的多孔有机聚合物 (PcPOP).
- 评估PCPOP作为离子电池的阳极材料的电化学性能.
主要方法:
- 在铜上通过H2Pc (乙烯) 的合反应在现场构建PcPOP4.
- 电化学测试PcPOP作为离子电池阳极,包括容量和循环稳定性测量.
主要成果:
- 在150 mA g-1下,PcPOP表现出1172 mA h g-1的高充电能力.
- 观察到卓越的循环稳定性,在600个循环后在1500 mA g-1下保持960.1 mA hg-1.
- 该材料的性能归因于富含电子的原子和sp混合碳.
结论:
- 具有丰富电子位点的内在兴奋剂POP提高了电化学性能.
- PcPOP是高性能离子电池的一个有前途的阳极材料.
相关概念视频
01:20Anionic Chain-Growth Polymerization: Overview
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
01:04Anionic Chain-Growth Polymerization: Mechanism
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael acceptor.