相关实验视频

Updated: Sep 15, 2025

Zinc-Sponge Battery Electrodes that Suppress Dendrites

Zinc-Sponge Battery Electrodes that Suppress Dendrites

Published on: September 29, 2020

开发高性能Zn²⁺预插入的MnO^{2通过现场的电位,用于水性Zn-离子电池}

Xingpeng Li¹, Weidong Liu¹, Haofan Sun¹

¹Key Laboratory for Electronic Materials, College of Electrical Engineering, Northwest Minzu University, Lanzhou, 730030, P. R. China. wjchen@xbmu.edu.cn.

Dalton transactions (Cambridge, England : 2003)

|July 15, 2025

概括

研究人员开发了一种用于水性离子电池 (AZIB) 的新型二氧化阴极. 预先插入离子显著提高了电池的性能和稳定性,为离子电池提供了一个有希望的替代品.

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) 为离子电池 (LIB) 提供了更安全,更便宜,更可持续的替代品.
二氧化 (MnO2) 是AZIBs的一个有前途的阴极材料,但由于结构性降解和缓慢的离子扩散,限制了其电化学性能.

研究的目的:

为了提高AZIBs的电化学性能和循环稳定性.
通过结构修改来解决AZIB中的传统MnO2阴极的局限性.

主要方法:

合成Zn2+预插入的MnO2 (Zn-MnO2) 通过in situ电解.
Zn//Zn-MnO2细胞的电化学表征.
使用静电间歇定位技术 (GITT) 调查电荷-放电机制.

主要成果:

与原始MnO2相比,Zn-MnO2阴极表现出明显增强的特异容量和循环性能.
Zn//Zn-MnO2细胞的容量衰变非常低,每周期0.029%在1000个循环中以1Ag-1.
预先插入的Zn2+离子稳定了MnO2结构,并减少了电荷-放电电压差.
在GITT分析中阐明了在放电过程中H+和Zn2+的共同插入机制.

结论:

Zn2+预插入的MnO2是先进的AZIB的高效阴极材料.
这种结构改造策略为克服基于MnO2的AZIB的性能限制提供了一条途径.
这些发现为开发高性能和耐用的水性离子电池提供了宝贵的见解.

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

Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering

Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering

Published on: April 17, 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...

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...