相关实验视频

Updated: May 13, 2025

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

使用不同盐涂层的LNMO阴极进行牺牲式预化,以稳定电极结构并提高电池性能

Ling Lin¹, Shuang Yuan¹, Huahui Chen¹

¹College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.

Langmuir : the ACS journal of surfaces and colloids

|April 14, 2025

概括

将氧酸盐添加到无,高压旋阴极 (LNMO) 中,可以通过防止电解质分解和改善容量保留来提高离子电池性能. 这种牺牲盐的策略提高了下一代电池的能量密度.

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:

没有的高压旋阴极LiNi0.5Mn1.5O4 (LNMO) 为下一代离子电池 (LIB) 提供高能量/功率密度.
高工作电压 (4.7V) 会导致电解质分解和结构损坏.
在早期周期中不可逆转的损失减少了产能,阻碍了商业化.

研究的目的:

调查使用祭盐用于LNMO电极的先化.
评估不同牺牲盐 (Li2C2O4,Li2CO3,CH3COOLi) 对LIB性能的影响.
为了利用LNMO的催化效应和牺牲盐预化,提高电池的稳定性和容量.

主要方法:

将牺牲盐与LNMO混合在一起,以创建预先化电极 (LNMO-Sac).
牺牲盐的催化分解通过LNMO.
形成一个稳定的电极-电解质接口.
使用预电极对LIB进行电化学性能测试.

主要成果:

LNMO有效地催化了牺牲盐的分解,形成了稳定的接口,并减轻了电极损伤.
补充Li2C2O4显著改善了活性水平和电化学性能.
在 500 个循环后,LNMO-Li2C2O4 在 1C 达到 137.9 mAh g-1 ,保持 85.9% 的容量.
LNMO-LO/Gr全电池的初始容量为117.9 mAh g-1,在300个循环后保留了79.4 mAh g-1.

结论:

牺牲盐预化是一种可行的策略,用于在LNMO阴极中补充.
Li2C2O4是一种高效的牺牲盐,可以提高基于LNMO的LIB性能.
这种方法减轻了电解质分解,并改善了实际LIB应用的长期循环稳定性.

更多相关视频

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

Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries

Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries

Published on: May 22, 2018

相关概念视频

Electrodeposition

Electrodeposition

Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...

Batteries and Fuel Cells

Batteries and Fuel Cells

A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...

Formation of Complex Ions

Formation of Complex Ions

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...