灵活的离子电池的高导电性和超伸缩自愈合水凝
Zhifeng Zeng1, Shanshan Liao1, Guanhao Ma1
1School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, People's Republic of China.
ACS applied materials & interfaces
|October 21, 2024
概括
本研究介绍了一种自我愈合的水凝电解质,用于柔性水性离子电池. 这种新材料抑制了树的生长,提高了可穿戴储能设备的安全性和性能.
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:
- 水性离子电池提供安全,环保的能量储存,但面临阳极树突和副作用的挑战.
- 这些问题限制了柔性离子电池的商业可行性.
研究的目的:
- 设计和合成一个双网络自我修复的水凝电解质与zwitterionic组用于灵活的能量存储.
- 为了改善电池性能,解决阳极中的树突形成和副作用.
主要方法:
- 一种聚烯胺-聚烯酸-基托桑水凝 (PAM-PAAS-QCS) 与兹维特基组的合成.
- 描述水凝的特性,包括伸展性,离子导电性和电化学稳定性.
- 使用开发的水凝电解质测试 Zn//Zn对称细胞和 Zn//Polyaniline全细胞.
- 在曲条件下评估弹性电池性能.
主要成果:
- PAM-PAAS-QCS水凝具有出色的伸展性 (5100%) 和高离子导电性 (33.61 mS/cm).
- 水凝有效地抑制了树突的形成和副作用反应,使涂/脱落能够稳定1500小时.
- 在1500个循环后,Zn//Polyaniline全细胞保持82.4%的容量,显示出良好的循环稳定性.
- 灵活的电池在各种曲条件下表现稳定.
结论:
- 开发的自愈水凝电解质克服了水性离子电池的关键局限性.
- 它的优越伸展性,离子导电性和树突抑制能力为先进的灵活能量存储和可穿戴设备铺平了道路.
相关概念视频
Electrolyte and Nonelectrolyte Solutions
Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
Batteries 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...
Induced Electric Dipoles
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
DC Battery
A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
Types of Reversible Electrodes
For electrode reversibility to be maintained, all the reactants and products involved in the half-reaction must be present at the electrode. There are several types of reversible electrodes (half-cells).In metal-metal-ion electrodes, a metal balances electrochemically with a solution of its own ions. Examples are Cu2+|Cu and Zn2+|Zn. Metals that react with the solvent, like group 1 and most group 2 metals, which react with water, and zinc, which reacts with aqueous acidic solutions, cannot be...
The Electrical Double Layer
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...


