相关实验视频

Updated: Jun 4, 2025

$In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries$

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries

Published on: November 10, 2014

在热波动期间,层氧化物阴极的相位演变

Yi-Chi Zhang^1,2, Min Hou², Han-Xiao Liu³

¹MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, State Key Laboratory of Space Power-Sources, Harbin Institute of Technology, No. 92 West-Da Zhi Street, Harbin 150001, China. wangzhb@hit.edu.cn.

Chemical communications (Cambridge, England)

|January 2, 2025

概括

分层过渡金属氧化物 (NaTMO₂) 是离子电池 (SIB) 的关键. 本综述详细介绍了合成条件如何影响相位形成和热稳定性,这对SIB性能和安全至关重要.

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:

分层过渡金属氧化物 (NaTMO₂) 是由于它们的合成容易和高容量,为离子电池 (SIB) 提供有希望的阴极材料.
NaTMO₂的相位演变和热稳定性对于SIB电化学性质,安全性和成本至关重要.

研究的目的:

要总结烧结条件对NaTMO₂阶段形成的影响.
讨论提高NaTMO₂阴极的热稳定性的策略.
在各种电化学和化学条件下分析相变.

主要方法:

关于热解温度,浸泡时间和冷却速度对NaTMO₂相形成的影响的文献综述.
讨论阶段增长中的热力学和动力学因素.
热稳定性增强技术的概述 (组合调制,表面重建,多相共生).

主要成果:

烧结条件显著影响NaTMO₂的相位形成模式.
热力学和动力学之间的竞争决定了阶段增长.
各种策略可以提高这些正极材料的热稳定性.

结论:

优化合成条件对于控制NaTMO₂阶段演变至关重要.
提高热稳定性是开发安全和高性能SIB的关键.
未来的研究应该专注于NaTMO₂分层氧化物的高效准备和强大的设计.

更多相关视频

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

Published on: March 7, 2022

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

相关概念视频

Voltaic/Galvanic Cells

Voltaic/Galvanic Cells

Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...

Thermal and Photochemical Electrocyclic Reactions: Overview

Thermal and Photochemical Electrocyclic Reactions: Overview

Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.

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...