相关实验视频

Updated: Jan 18, 2026

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

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

Published on: November 10, 2014

对离子电池的丰富层状阴极的快速充电诱导裂纹和批量结构损坏的见解

Jingyi Qu¹, Zhong Xie², Isobel C Bicket¹

¹Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada.

|September 11, 2025

概括

快速充电会导致,,,氧化物 (NMC811) 阴极的结构性降解,导致裂生长和容量损失. 了解这些故障机制对于提高电池性能至关重要.

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
电池技术电池技术

背景情况:

富含Ni的NMC (,,,氧化物) 阴极为离子电池提供高能量密度.
快速充电是行业的关键需求,但其对NMC结构完整性的影响尚不清楚.

研究的目的:

在长时间的快充循环下,研究NMC811阴极的结构降解.
确定故障机制及其对电化学性能的影响.

主要方法:

在快速充电条件下的电化学循环.
用于裂分析的显微镜 (纳米和微尺度).
电子能量损失光谱 (EELS) 和X射线衍射 (XRD) 用于材料分析.

主要成果:

长时间的快速充电会诱导NMC811颗粒的显著裂生长.
裂加快电解质透,在粒子内部形成阴极电解质介相 (CEI).
的度梯度驱动一个疲劳破裂机制.
在快速充电的NMC811中,不可逆转的损失,分层结构扭曲和阴离子混合发生.
这些因素导致了大量的产能丧失.

结论:

快速充电对富含Ni的NMC阴极构成重大结构性挑战.
由于Li梯度的疲劳裂纹机制被确定为根本原因.
结果为设计更强大的NMC阴极提供了洞察力,用于要求更高的应用.

关键词:

利损失利损失利损失离子电池是一种离子电池.富含的分层阴极.阴极电解质相间阶段化混合混合化混合破裂,裂,裂,裂,裂,裂,裂,裂,裂,裂,裂,裂,裂,裂,裂,裂,裂.快速充电是一种快速充电.

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

The Effect of Charging and Discharging Lithium Iron Phosphate-graphite Cells at Different Temperatures on Degradation

The Effect of Charging and Discharging Lithium Iron Phosphate-graphite Cells at Different Temperatures on Degradation

Published on: July 18, 2018

相关概念视频

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...