相关实验视频

Updated: Jun 12, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

单化以太基电解质的分子设计用于全气候离子电池和金属电池

Yejuan Xue¹, Yueda Wang¹, Heng Zhang¹

¹School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China.

Angewandte Chemie (International ed. in English)

|September 20, 2024

概括

一种新型的单化以太, bis ((2-fluoroethoxy) 甲 (BFME),通过提高离子导电性和在广泛的温度范围内实现稳定的循环,提高了金属电池的性能.

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
电池技术电池技术

背景情况:

乙烯由于其稳定性,显示出其作为金属电池的电解质溶剂的前景.
乙烯中的高化导致离子导电性差,温度适应性有限.
需要新的电解质溶剂,以平衡稳定性和性能.

研究的目的:

为了合成和评估单化线性以太,2-氧甲 (BFME),作为电解质溶剂.
调查BFME对离子导电性,+溶解和界面性质的影响.
评估BFME在离子和金属电池中在广泛的温度范围内的性能.

主要方法:

二氧化二二氧化甲 (BFME) 的合成.
电化学表征包括离子导电性和循环效率测量.
在各种温度条件下制造和测试袋式电池 (Graphite Rainbow LiFePO4和Li Rainbow LFP).

主要成果:

BFME具有中等的Li+亲和力,增强离子导电性并降低Li+溶解能量.
BFME电解质形成一个富含LiF的界面膜,导致高库伦比效率 (94.9%初始,99.8%的涂/剥离).
石墨水处理器 LiFePO4 电池显示出极好的容量保留 (83.2-92.5%) 在-20°C至60°C.
一个3Ah的LFP电池表现出65个周期的稳定运行,容量保留99%.

结论:

BFME是一种有效的电解质溶剂,用于稳定离子和金属电池的接口.
BFME的独特结构扩大了温度适应性,使得从-60°C到60°C的高性能成为可能.
对于下一代电池电解质而言,BFME 是一个有前途的进步.

关键词:

化以太电解质的化以太电解质.金属阳极是一种金属阳极.石墨阳极是一种石墨阳极.具有广泛温度的电解质.

更多相关视频

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

相关概念视频

Ionic Bonding and Electron Transfer

Ionic Bonding and Electron Transfer

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.

Molecular Shape and Polarity

Molecular Shape and Polarity

Dipole Moment of a Molecule

Crown Ethers

Crown Ethers

Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether...