采电子电解质添加剂 强大的坚固Zn-I电池 持久于-40°C的低温
Shuaibing Wang1, Yulong Chen1, Saddick Donkor2
1College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|November 6, 2025
概括
兹威特烯 (ZiPy) 添加剂通过防止聚化穿和稳定阳极,增强- (Zn-I2) 电池的稳定性. 这导致了特殊的自行车性能和低温耐久性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- - (Zn-I2) 电池由于聚化穿和阳极腐蚀,因此周期稳定性不佳.
- 活性物质损失和阳极降解限制了Zn-I2电池的实际应用.
研究的目的:
- 开发一种双功能添加剂,zwitterionic pyrrole (ZiPy),以减轻聚酸的运输和稳定Zn-I2电池中的阳极.
- 通过实验和理论分析,研究Zipy通过实验和理论分析改善电池性能的机制.
主要方法:
- 作为一个电解质添加剂的zwitterionic pyrrole (ZiPy) 的设计和合成.
- 带有和没有ZiPy的Zn-I2电池的电化学测试,包括长期循环和低温性能评估.
- 计算建模和理论计算,以了解界面相互作用和离子传输.
主要成果:
- ZiPy有效地吸附聚化并稳定阳极接口.
- 加入ZiPy调节了界面pH,修改了Zn2+溶解结构,并促进了的 (002) 平面偏好的生长.
- 带有ZiPy的电池实现了显著的循环稳定性,在8 A g-1完成了45,000个循环,在-40°C下保持了90.1%的容量.
结论:
- 采用ZiPy的Zwitterionic电解质工程是开发高性能和稳定的Zn-I2电池的一个有希望的策略.
- ZiPy解决了关键的降解机制,为基于的先进能源存储系统铺平了道路.
- 该研究强调了定制分子设计在克服电池技术局限性的潜力.
相关概念视频
Ionic Bonds
127.5K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
127.5K
Ion Exchange
1.1K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.1K
Batteries and Fuel Cells
30.7K
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...
30.7K
Formation of Complex Ions
25.6K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
25.6K
Electrolyte and Nonelectrolyte Solutions
70.9K
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.
70.9K
Zener Diodes
1.1K
Zener diodes are specialized semiconductor devices designed to operate in the reverse breakdown region, where they allow current to flow into the cathode, making it positive relative to the anode. This reverse operation distinguishes Zener diodes from conventional diodes and enables their use in various applications, most notably as voltage regulators. One of the defining characteristics of Zener diodes is their nearly vertical I-V (current-voltage) characteristic curve above a certain...
1.1K


