相关实验视频

Updated: Jun 22, 2025

$In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries$

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries

Published on: November 10, 2014

重建赫尔姆霍尔茨飞机使长寿命和高安全的离子电池能够实现强大的F-丰富接口

Long Chen¹, Ming Chen², Qingfei Meng³

¹Key Laboratory of Hydraulic Machinery Transients, Ministry of Education School of Power and Mechanical Engineering, Wuhan University, Wuhan, 430072, P. R. China.

Angewandte Chemie (International ed. in English)

|July 4, 2024

概括

研究人员通过开发一种新的电解质添加剂TFEP来提高离子电池的性能,TFEP稳定了硬碳阳极并增强了更好的电池的离子扩散.

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:

硬碳 (HC) 是用于离子电池的常见阳极材料.
传统电解质中的固体电解质接口 (SEI) 层由于溶解和缓慢的离子动力学,阻碍了性能.
电极/电解质接口属性对于电池性能至关重要.

研究的目的:

研究特定溶剂在重建赫尔姆霍尔茨平面和调节HC阳极上的SEI层中的作用.
开发一种新的电解质添加剂TFEP,以提高离子电池的性能.

主要方法:

使用PFBE (PF6-离子结合能) 和CAE (碳吸收能) 的溶剂过.
以TFEP为基础的电解质形成的SEI膜的表征.
电化学测试纳米基底HC半电池和HC半电池纳米基底Na4Fe3(PO4)2P2O7.

主要成果:

TFEP促进在HC阳极上形成一个坚固,薄,富含的SEI膜.
新的SEI层增强了机械稳定性和Na+离子扩散动力学.
基于TFEP的电解质显著提高了速度能力,循环寿命,安全性和低温性能.

结论:

TFEP有效地重建了赫尔姆霍尔茨平面,并调节了HC阳极上的SEI膜.
开发的电解质为低成本,寿命长,安全性高的离子电池提供了有前途的解决方案.
这项工作为先进的离子电池电解质的调接口特性提供了洞察力.

关键词:

电解质优化的电解质优化增强了安全,提高了安全性.在低温下表现的性能.在IHP的重建.离子电池是一种离子电池.

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

In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy

In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy

Published on: September 12, 2018

相关概念视频

Electrostatic Boundary Conditions in Dielectrics

Electrostatic Boundary Conditions in Dielectrics

When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...

Dielectric Polarization in a Capacitor

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...

Voltaic/Galvanic Cells

Voltaic/Galvanic Cells

Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...