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Updated: Mar 28, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Cavity-Engineered Polycrystalline Cathodes Resolve Stress Concentration Problem in All-Solid-State Lithium Metal

Tianpeng Huang^1,2,3,4, Yue Zheng^1,3,4,5, Jun Ma^1,3,4

¹Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.

Advanced Materials (Deerfield Beach, Fla.)

|March 27, 2026

Summary

This summary is machine-generated.

Designing cavity-contained cathode particles in all-solid-state lithium metal batteries (ASSLMBs) effectively manages stress concentration. This innovation enhances battery cycling stability and longevity by improving mechanical and electrochemical performance across multiple scales.

Keywords:

all‐solid‐state lithium metal batteries central‐cavity polycrystalline cathode mechanical‐electrochemical degradation multi‐scale failure stress concentration

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Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy

Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy

Published on: January 20, 2023

Area of Science:

Materials Science
Electrochemistry
Battery Technology

Background:

All-solid-state lithium metal batteries (ASSLMBs) offer higher energy density than liquid systems.
Stress concentration in polycrystalline (PC) Ni-rich cathode materials is a major, poorly understood cause of ASSLMB degradation.
Existing cathode designs struggle to mitigate multiscale mechanical-electrochemical degradation.

Purpose of the Study:

To design and investigate cavity-contained PC LiNi0.9Co0.05Mn0.05O2 (NCM) cathode particles for bottom-up stress management.
To elucidate the mechanisms of stress concentration and degradation in ASSLMBs at the particle-electrode-battery multiscale.
To improve the cycling stability and lifespan of ASSLMBs through tailored cathode particle architecture.

Main Methods:

Design of central-cavity NCM cathode particles for stress mitigation.
Synchrotron X-ray tomography to analyze material structure and degradation.
Multiscale finite element simulations to model mechanical-electrochemical behavior.
Electrochemical cycling tests to evaluate battery performance.

Main Results:

Central-cavity NCM particles suppressed internal cracking by shortening ion transport and providing stress-relief space.
Enhanced uniformity in cathode (de)lithiation, reduced electrolyte porosity/fracture, and inhibited anode lithium dendrite formation were observed.
ASSLMBs with central-cavity NCM showed superior cycling stability (86.4% after 200 cycles, 81.5% after 400 cycles) compared to cavity-free and single-crystal NCM.

Conclusions:

Cathode reaction heterogeneity drives multiscale mechanical-electrochemical degradation in ASSLMBs.
Central-cavity NCM design effectively manages stress concentration across particle-electrode-battery scales.
This approach offers a holistic strategy for designing long-lifespan ASSLMBs.