相关实验视频

Updated: Jun 23, 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

通过高性能金属电池的三级梯度框架调节沉积行为

Weishan Cao^1,2, Mengyue Liu³, Weihao Song^1,2

¹State Key Laboratory of Chemical Resource Engineering, Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|June 18, 2024

概括

一个具有三级梯度结构的新型自支碳框架 (Gra-GC-MoSe2) 允许均的沉积,防止树突的形成并提高电池性能. 这种材料确保了离子电池的稳定循环和高能量密度.

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
纳米技术纳米技术

背景情况:

金属阳极对于高能量密度电池至关重要.
实现均的沉积和防止树岩的形成仍然是一个重大挑战.
现有的阳极材料往往由于循环稳定性差以及库伦比效率低而受到损害.

研究的目的:

开发一种高效的合成方法,用于具有量身定制属性的自支碳框架 (Gra-GC-MoSe2).
在设计框架内研究沉积调节的机制.
为了评估离子电池中改性阳极的电化学性能.

主要方法:

一个三级梯度碳框架 (Gra-GC-MoSe2) 的合成,具有受控的sodiophilic网站,毛孔体积和电导率.
在现场和现场表征技术.
理论计算以了解离子扩散和沉积机制.
对称和不对称的电池和全电池的电化学测试.

主要成果:

格拉-GC-MoSe2框架促进了从底部到顶部的均沉积,抑制了树岩的形成.
在MoSe2衍生物中的渐变分布增强了性,而多孔纳米结构优化了Na+扩散.
修改后的阳极 (Na@Gra-GC-MoSe2) 呈现出高库伦比效率,长周期寿命 (在对称电池中为2000小时),极化低,在高容量 (10 mAh cm-2) 时稳定运行.
一个完整的电池 (Na@Gra-GC-MoSe2 redhaNa3V2(PO4)3) 显示出高能量密度和出色的循环性能.

结论:

拟议的Gra-GC-MoSe2框架是调节沉积的高度有效的策略.
这种材料显著提高了金属阳极的稳定性和性能.
这些发现为开发更安全,更高效的离子电池铺平了道路.

关键词:

碳框架碳框架碳框架梯度梯度是指一个梯度.沉积行为的行为.金属阳极是一种金属阳极.金属电池的电池是一种金属电池.

更多相关视频

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

Zinc-Sponge Battery Electrodes that Suppress Dendrites

Zinc-Sponge Battery Electrodes that Suppress Dendrites

Published on: September 29, 2020

相关概念视频

Electrogravimetric Analysis: Overview

Electrogravimetric Analysis: Overview

Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
To test the completeness of the...

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...

Ionic Strength: Effects on Chemical Equilibria

Ionic Strength: Effects on Chemical Equilibria

The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary...

What is an Electrochemical Gradient?

What is an Electrochemical Gradient?

Adenosine triphosphate, or ATP, is considered the primary energy source in cells. However, energy can also be stored in the electrochemical gradient of an ion across the plasma membrane, which is determined by two factors: its chemical and electrical gradients.
The chemical gradient relies on differences in the abundance of a substance on the outside versus the inside of a cell and flows from areas of high to low ion concentration. In contrast, the electrical gradient revolves around an...

Regulation of Sodium and Potassium

Regulation of Sodium and Potassium

The regulation of sodium and potassium ion concentrations in the human body is a complex process governed primarily by hormones such as aldosterone, antidiuretic hormone (ADH), and atrial natriuretic peptide (ANP).
Sodium Regulation
Sodium ions make up approximately 90% of extracellular cations, with a normal blood plasma concentration of 136–148 mEq/L. A decrease in blood volume and pressure triggers the release of renin from granular cells in the juxtaglomerular complex (JGC), primarily...