一种基于氨酸-基尼尔的合有机聚合物作为可充电有机电池的高性能阴极
Xi Peng1, Yangmei Zhou1, Binhua Chen2
1Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan411105, China.
ACS applied materials & interfaces
|October 3, 2024
概括
一种新型的合有机聚合物PCuTPEP被开发为有机电池的高性能阴极. 这种材料克服了溶解性和导电性问题,为先进的能量存储展示了出色的容量和稳定性.
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:
- 有机电极材料 (OEM) 为可充电电池提供了低成本和灵活性等优势.
- 原始设备制造商的主要局限性包括高电解质可溶性和低电子导电性.
- 开发稳定和导电的有机阴极对于推进储能至关重要.
研究的目的:
- 为高性能有机电池引入一种结合有机聚合物 (COP) 阴极,即聚[5,10,15,20-四基4-基) 氨酸]Cu(II)) (PCuTPEP),用于有机电池.
- 解决传统OEM厂商面临的溶解性和导电性挑战.
- 为了证明PCuTPEP的电化学性能和稳定性.
主要方法:
- 结合有机聚合物PCuTPEP的合成和表征.
- 制造和电化学测试PCuTPEP作为有机电池中的阴极材料.
- 评估放电能力,循环稳定性和在不同温度和电流密度下的性能.
主要成果:
- PCuTPEP的聚合有效地抑制了电解质中的溶解.
- 扩展合系统在4.0V (vs Li+/Li) 提供了高平均放电平原.
- PCuTPEP 阴极在 50 mA g-1.1 时实现了 119 mAh g-1 的可逆放电容量.
- 观察到卓越的循环稳定性,在分别在25°C和50°C的1000个循环后保持了88.5%和90.4%的容量,即使在2.0 A g-1.1时也是如此.
结论:
- 作为可充电电池的高性能有机阴极材料,PCuTPEP显示出巨大的潜力.
- 开发的COP方法有效地克服了OEM的关键局限性,为其更广泛的应用铺平了道路.
- 这项研究为设计用于电化学能量储存系统的先进有机阴极提供了一个有希望的策略.
更多相关视频
08:29Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
Published on: January 10, 2017
09:17Reductive Electropolymerization of a Vinyl-containing Poly-pyridyl Complex on Glassy Carbon and Fluorine-doped Tin Oxide Electrodes
Published on: January 30, 2015
相关概念视频
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
01:17Pericyclic Reactions: Introduction
Pericyclic reactions are organic reactions that occur via a concerted mechanism without generating any intermediates. The reactions proceed through the movement of electrons in a closed loop to form a cyclic transition state, where rearrangement of the σ and π bonds yields specific products.
Pericyclic reactions can be classified into three categories: electrocyclic reactions, cycloaddition reactions, and sigmatropic rearrangements. Electrocyclic reactions and sigmatropic rearrangements are...
Pericyclic reactions can be classified into three categories: electrocyclic reactions, cycloaddition reactions, and sigmatropic rearrangements. Electrocyclic reactions and sigmatropic rearrangements are...
03:12Batteries and Fuel Cells
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...
01:26Photochemical Electrocyclic Reactions: Stereochemistry
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
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,...
01:17Thermal Electrocyclic Reactions: Stereochemistry
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.