相关实验视频

Updated: Jun 28, 2025

Rapid Scan Electron Paramagnetic Resonance Opens New Avenues for Imaging Physiologically Important Parameters In Vivo

Rapid Scan Electron Paramagnetic Resonance Opens New Avenues for Imaging Physiologically Important Parameters In Vivo

Published on: September 26, 2016

从高分辨率的偏磁性NMR光谱学中对LiNiO₂阴极老化的新见解

H Nguyen^1,2, P Kurzhals³, M Bianchini^3,4

¹Materials Department, University of California, Santa Barbara, CA 93106, USA. rclement@ucsb.edu.

Chemical communications (Cambridge, England)

|April 10, 2024

概括

在氧化阴极中的降解与大量异质性有关. 研究人员首次揭示了共存的结构域及其不同的含量和活性.

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
固态化学固态化学

背景情况:

氧化 (LiNiO2) 是高能量密度电池的关键阴极材料.
了解降解机制对于提高电池性能和寿命至关重要.
在LiNiO2阴极中的散装降解过程仍然不完全理解.

研究的目的:

为了研究 LiNiO2 阴极中的散装降解过程.
为了将产能衰减与大量异质性的出现相关联.
为了阐明在充电状态下共存的结构域的性质.

主要方法:

高分辨率的固态核磁共振 (NMR) 光谱学.
磁力测量磁力测量磁力测量
在X射线衍射 (XRD).

主要成果:

在LiNiO2阴极中的容量衰变与散装异质性直接相关.
在充电状态下,多个不同的结构域在阴极材料内共存.
这些个别领域的 (Li) 含量和电化学活性成功地被揭开了.

结论:

批量异质性,以共存的结构域为特征,是LiNiO2阴极降解的主要驱动因素.
这项研究为这些领域内的含量和电化学活性提供了第一个详细的描述.
这些发现为设计更稳定,更耐用的基于LiNiO2的正极材料提供了关键的见解.

更多相关视频

Author Spotlight: Automated Lifespan Monitoring – Discovering Aging Dynamics with the Lifespan Machine

Author Spotlight: Automated Lifespan Monitoring – Discovering Aging Dynamics with the Lifespan Machine

Published on: January 26, 2024

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

Mitochondria

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...