相关实验视频

Updated: Jun 3, 2025

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

使用高的配置策略来设计具有显著的电化学性能的斯宾尔酸阴极

Yixue Huang¹, Bao Zhang¹, Jian Zhang²

¹National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China.

Small (Weinheim an der Bergstrasse, Germany)

|January 7, 2025

概括

研究人员开发了一种新型的高度合螺旋材料 (HE-LMO) 来改进离子电池. 这种先进的材料表现出增强的稳定性和容量保留,克服了传统螺旋LiMn2O4的局限性,以提高电池性能.

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
储能储能储能储能储能储能

背景情况:

尖LiMn2O4是离子电池 (LIB) 的一个有希望的,低成本的阴极材料,由于其丰富的和高电压.
阻碍LiMn2O4采用的主要挑战包括容量退化和由Jahn-Teller扭曲和溶解引起的低速率能力.
减少对和等稀缺元素的依赖对于可持续的电池开发至关重要.

研究的目的:

为LIBs开发一种稳定,高性能的spinel正电极材料.
通过先进的兴奋剂策略,克服原始LiMn2O4的局限性.
为了研究一种新型高度兴奋剂材料的结构和电化学特性.

主要方法:

合成了一个复杂的缩合螺旋材料:LiMn1.98Mg0.005Ti0.005Sb0.005Ce0.005O4 (HE-LMO).
评估电化学性能,包括初始放电容量和循环稳定性.
使用理论计算来了解材料的电子结构和粘合特性.

主要成果:

该HE-LMO电极的初始放电容量为111.51mAhg-1.1.
在1°C的500个循环后实现了90.55%的优异容量保留,明显超过原始材料.
理论计算证实了费米水平的状态密度更高,以及HE-LMO中强大的Mn─O结合.

结论:

开发的HE-LMO表现出卓越的循环稳定性和电化学性能.
高性兴奋剂是一种有效的策略,用于增强基于的spinel LIBs的特性.
这项研究为设计先进的LIB材料提供了一个简单的方法.

关键词:

高的兴奋剂使用高.离子电池是一种离子电池.螺旋 LiMn2O4O4 的时间.

更多相关视频

Construction and Testing of Coin Cells of Lithium Ion Batteries

Construction and Testing of Coin Cells of Lithium Ion Batteries

Published on: August 2, 2012

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Published on: February 1, 2016

相关概念视频

Colors and Magnetism

Colors and Magnetism

Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...