相关实验视频

Updated: May 30, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

限制在表面的无序键使全固态PEO基电池中的有效运输成为可能

You Fan¹, Oleksandr I Malyi², Huicai Wang¹

¹College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China.

Angewandte Chemie (International ed. in English)

|January 27, 2025

概括

研究人员开发了一种新的无序H键系统,用于基于聚乙烯氧化物 (PEO) 的固态电解质. 这项创新增强了离子传输和电池稳定性,提高了全固态电池 (ASSLB) 的性能.

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
聚合物科学聚合物科学

背景情况:

基于聚乙烯氧化物 (PEO) 的电解质对于开发安全且高能量密度的全固态电池 (ASSLB) 至关重要.
在PEO中不高效的离子 (Li+) 运输限制了电池速率的性能和稳定性.
调节键 (H键) 是Li+运输的关键,但挑战包括电化学不稳定性和限制移动性.

研究的目的:

通过开发一种新的表面受限无序H键系统来克服基于PEO的电解质的局限性.
改善Li+运输和电化学稳定性,以提高ASSLB的性能.

主要方法:

在基于PEO的电解质中设计和合成一个局限于表面的无序H键系统.
使用稳定的供体-接受体相互作用来创建松散的链段/离子排列.
使用开发的电解质制造和测试基于铁酸盐 (LiFePO4) 的ASSLB.

主要成果:

新系统抑制了PEO结晶,削弱了Li+协调,并捕获了离子,促进了高效的Li+运输.
基于LiFePO4的ASSLB在1.0°C和65°C下实现了400多个循环,容量保持率为87.5%.
性能超过了大多数报告的基于聚合物的ASSLB,证明了更好的循环寿命和稳定性.

结论:

封闭的无序H键对于优化基于聚合物的ASSLB中的Li+运输至关重要.
这种方法为设计先进的固态电解质提供了一个有希望的策略.
这项研究为未来高性能和安全的全固态电池铺平了道路.

关键词:

在H债券中,Li+ 运输运输运输运输所有固态电池都是固态电池.聚乙烯氧化物聚乙烯氧化物聚合物电解质的聚合物电解质.

更多相关视频

Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing

Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing

Published on: March 7, 2018

Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy

Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy

Published on: January 20, 2023

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.

Intermolecular Forces

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...