相关实验视频

Updated: Jun 26, 2025

Zinc-Sponge Battery Electrodes that Suppress Dendrites

Zinc-Sponge Battery Electrodes that Suppress Dendrites

Published on: September 29, 2020

在水性离子电池中,聚氧甲酸盐溶液被动化,使得无树和高性能阳极能够在水性离子电池中使用

Bin-Bin Sui¹, Lin Sha¹, Qing-Peng Bao¹

¹Key Laboratory of Polymer and Catalyst Synthesis Technology of Liaoning Province, School of Environmental and Chemical Engineering, Shenyang University of Technology, Shenyang 110870, China.

Journal of colloid and interface science

|May 15, 2024

概括

研究人员使用聚氧甲酸盐溶液为水性离子电池中的阳极开发了一种保护性被动化层. 这种MO层有效地防止了树的生长和腐蚀,大大延长了电池的寿命和性能.

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:

水性离子电池 (AZIB) 中的金属阳极遭受状物生长和副作用,阻碍了它们的实际应用.
现有的阳极由于界面不稳定性而面临周期寿命和稳定性的限制.
工业金属改造技术激发了新型被动化策略的发展.

研究的目的:

为阳极开发一种被动化溶液,以抑制AZIB中的树突生长和界面腐蚀.
为了研究基于聚氧甲酸盐的被动化层 (MO层) 对阳极性能的有效性.
为了评估使用改性阳极的全AZIB电池的性能.

主要方法:

用于阳极被动化的聚氧甲酸盐溶液 (MO溶液) 的配方.
形成的MO层的形态,均性和保护性质的表征.
在各种电流密度和循环数下对称电池和全电池 (MO-Zn//NaVO) 的电化学测试.

主要成果:

大约10微米厚的MO层提供了均和保护性涂层,减少了腐蚀电流密度.
MO-Zn阳极表现出抑制的树突生长和增强的 Zn 合均性,在对称细胞中达到 8 mA cm-2 的周期寿命超过 420 小时.
充满电池的MO-Zn//NaVO电池在1000次循环以2A/g的速度后,表现出稳定的152.83 mAh/g的特定容量,为小型灯泡提供动力.

结论:

聚氧甲酸盐溶液处理是优化AZIB中的阳极的可行策略.
该MO层有效地抑制了树的生长和界面腐蚀,从而显著提高了电池的性能和寿命.
这种方法有望促进高性能和可靠的水性离子电池的开发.

关键词:

树的成长树的成长接口腐蚀是因为接口腐蚀消极化处理是一种被动化处理.聚氧甲酸盐是一种多氧金属酸盐.金属阳极是一种金属阳极.

更多相关视频

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

相关概念视频

Standard Electrode Potentials

Standard Electrode Potentials

On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...

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...

Extraction: Advanced Methods

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...

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...