相关实验视频

Updated: May 4, 2026

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

Na_0.4MnO₂/MXene纳米复合材料作为高性能水性离子电池的阴极

Guangquan Si¹, Wei Li², Taijiang Li²

¹Huaneng Power International, Inc. Beijing 100031 China liwei@tpri.com.cn.

|July 9, 2024

概括

研究人员为水性离子电池 (ZIB) 开发了Na0.4MnO2@MXene. 这种正极材料具有高容量和稳定性,克服了ZIB中传统二氧化的局限性.

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:

由于其独特的结构,二氧化 (MnO2) 是水性离子电池 (ZIB) 的有前途的阴极材料.
关键的挑战包括缓慢的Zn2+扩散动力学和在循环过程中因晶格扭曲而导致的容量退化.
开发先进的电极材料对于提高ZIB性能至关重要.

研究的目的:

为了合成一种具有2x4道结构的新Na0.4MnO2@MXene材料.
研究其作为水性ZIB的高性能阴极的潜力.
解决MnO2在离子扩散和长期稳定性方面的局限性.

主要方法:

通过水热合成Na0.4MnO2@MXene纳米棒 (约. 56纳米直径) 使用5M NaCl.
在水性ZIB中对材料的电化学表征.
评估特定能力,速度能力和循环稳定性.

主要成果:

合成的Na0.4MnO2@MXene具有324.6 mA hg-1的高特异容量,在0.2 A g-1.
经过1000个循环以2Ag-1 (91.4%的保留率) 保持153.8mAhg-1的良好长期稳定性.
2x4道结构促进了离子扩散,并提供了丰富的活性点,提高了电化学性能.

结论:

具有2x4道结构的Na0.4MnO2@MXene是水性ZIB的高效阴极材料.
该材料克服了与传统的MnO2相关的动力限制和稳定性问题.
这一发展为ZIB技术中先进的储能解决方案提供了一个有前途的途径.

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

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

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...

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...