一个生物灵感的多功能水凝网络,具有强硬的界面化学,用于无状柔性离子电池
1Department of Polymeric Materials & Engineering, College of Materials & Metallurgy, Guizhou University, Huaxi District, 550025, Guiyang, China.
Angewandte Chemie (International ed. in English)
|August 8, 2024
概括
研究人员开发了一种新的水凝电解质,用于灵活的离子电池. 这种增强的水凝提供了更好的强度,灵活性和稳定性,使得可穿戴电子产品可以无地长期储存能量.
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:
- 灵活和高性能水性离子电池 (ZIB) 对于可穿戴电子产品至关重要,因为它们的安全性和低成本.
- 水凝电解质提供灵活性和减轻副作用,但与机械性能和界面稳定性作斗争.
- 较差的机械和接口特性限制了当前柔性ZIB在应力下的性能.
研究的目的:
- 开发一个生物灵感的多功能水凝电解质网络,用于增强灵活的ZIB.
- 为了提高水凝电解质的机械强度,附着性和界面化学.
- 为了实现具有卓越性能的无树和长寿命的灵活ZIB.
主要方法:
- 一种聚烯胺 (PAM) /三醇水凝电解质使用三醇网络修复策略进行了合成.
- 评估了水凝的机械性能 (强度,伸展性) 和粘合性能.
- 评估了水凝对 Zn 阳极和 Zn 核化/生长调节的抗腐蚀能力.
- 在各种曲条件下制造和测试了柔性Zn//MnO2囊细胞.
主要成果:
- 经过三醇修饰的PAM水凝显示出优越的强度 (100kPa) 和伸展性 (5338%).
- 水凝对各种基板具有很强的粘附性,并且对阳极具有很好的抗腐蚀性能.
- 水凝电解质促进了无树的Zn沉积,达到98.8%的库伦比效率和超过2400小时的稳定性.
- 灵活的Zn//MnO2囊细胞在曲应力下表现出色的循环性能.
结论:
- 一种新的PAM/三醇水凝电解质显著提高了柔性ZIB的性能.
- 生物灵感设计克服了传统水凝的局限性,使其具有强大而稳定的界面化学.
- 这项工作为开发各种应用的先进灵活能源存储设备提供了有前途的途径.
相关概念视频
02:47Voltaic/Galvanic Cells
69.7K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
69.7K
03:02Standard Electrode Potentials
52.6K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
52.6K
03:12Batteries and Fuel Cells
32.1K
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...
32.1K
01:06Interfacial Electrochemical Methods: Overview
1.1K
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
1.1K
01:24Electrochemical Systems
143
Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution,...
143
01:30The Electrical Double Layer
195
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
195