一个两性分子诱导的离子丰富接口用于下一代金属电池
Sheng Liu1, Yu Yan1,2, Ruixin Zheng1
1College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1# Dongsanlu, Erxianqiao, Chengdu, Sichuan, 610059, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|November 22, 2024
概括
使用非-1-butanesulfonate (NFSA) 的电解质工程为可靠的金属电池 (LMB) 创造了一个稳定的接口. 这种设计增强了电化学稳定性和循环寿命,这对于先进的电池应用至关重要.
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:
- 坚固的电极/电解质介面对于稳定的 (Li) 金属电池 (LMB) 来说至关重要.
- 当前的电解质在实现长期的电化学稳定性方面经常面临挑战.
- 阳离子丰富接口设计是提高LMB性能的一个有希望的策略.
研究的目的:
- 调查使用一种两性分子,非-1-butanesulfonate (NFSA),用于电解质工程在LMBs.
- 阐明NFSA在电解质和阳极/电解质间相中的功能.
- 用NFSA修改过的电解质来证明LMB的电化学性能和稳定性的提高.
主要方法:
- 使用两性分子非-1-butanesulfonate (NFSA) 的电解质修饰.
- 对电解质和相间特性进行理论和实验分析.
- 在各种条件下,对Li所制成的基,Li所制成的基和Li所制成的基LiFePO4全细胞进行电化学测试.
主要成果:
- 在电极上,NFSA创建了一个稳定的介相,该介相被离子衍生的无机化合物丰富.
- 电池表现为稳定运行超过200个周期,具有低不可逆转的容量损失 (2.4 mAh cm−2).
- 体白细胞的循环寿命延长 (>1500小时),超电位最小 (36.5mV).
- 在苛刻的条件下 (有限的,高负载,稀缺的电解质) 经过500个循环后,使用LiFePO4阴极的全电池保持了80%以上的容量.
结论:
- 在LMB中,NFSA作为一种有效的电解质添加剂,用于制造稳固的电极/电解质接线.
- 离子丰富策略显著提高了金属阳极的电化学稳定性和周期寿命.
- 开发的电解质能够实现高性能全电池,即使在具有挑战性的操作参数下,为实际的LMB铺平了道路.
更多相关视频
相关概念视频
01:17Ion Exchange
553
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...
553
00:56Extraction: Advanced Methods
420
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
420
03:45Formation of Complex Ions
23.3K
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...
23.3K
02:51Metal-Ligand Bonds
20.6K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
20.6K
01:09Ion-Exchange Chromatography
369
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
369
02:48Ionic Bonding and Electron Transfer
41.2K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
41.2K