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Related Experiment Video

Updated: Nov 28, 2025

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

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Published on: November 10, 2014

Dynamic Evolution of a Cathode Interphase Layer at the Surface of LiNi_0.5Co_0.2Mn_0.3O₂ in Quasi-Solid-State Lithium

Hui-Juan Guo^1,2, Huai-Xiang Wang^2,3, Yu-Jie Guo^1,2

¹CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.

Journal of the American Chemical Society

|November 30, 2020

Summary

Understanding cathode interphase evolution in solid-state lithium batteries (SSLBs) is key for performance. This study reveals dynamic changes in surface structure, chemistry, and mechanics during cycling, crucial for designing better SSLBs.

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Last Updated: Nov 28, 2025

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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

Area of Science:

Materials Science
Electrochemistry
Battery Technology

Background:

Advanced solid-state lithium batteries (SSLBs) require deep understanding of cathode material surface mechanisms.
Structural evolution, chemical, and mechanical stability during cycling are critical for SSLB design.

Purpose of the Study:

To explore the dynamic surface evolution of LiNi0.5Co0.2Mn0.3O2 cathode particles in a working SSLB.
To investigate the formation and properties of the cathode interphase layer in real-time.

Main Methods:

Utilized in situ atomic force microscopy (AFM) to monitor dynamic surface processes.
Employed in situ scanning of the Derjaguin-Muller-Toporov (DMT) modulus to track mechanical property evolution.
Identified interphase layer components at different cycling stages.

Main Results:

Real-time imaging of the inorganic-organic hybrid cathode interphase layer formation.
Detailed identification of LiF, Li2CO3, and organic species within the interphase.
Correlation of interphase evolution with battery impedance buildup and degradation mechanisms like transition metal migration.

Conclusions:

A stable cathode interphase layer is pivotal for enhancing SSLB performance.
Insights into dynamic surface morphology, chemical composition, and mechanical properties of the interphase are crucial for SSLB optimization.