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Related Experiment Video

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Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

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Published on: January 21, 2016

Microstrain screening towards defect-less layered transition metal oxide cathodes.

Wenhua Zuo¹, Jihyeon Gim¹, Tianyi Li²

¹Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, USA.

Nature Nanotechnology

|August 20, 2024

Summary

Microstrain in battery materials hinders performance. This study reveals transition metal distribution during synthesis dictates microstrain, enabling defect-less battery material design for improved stability and longevity.

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Area of Science:

Materials Science
Electrochemistry
Solid-State Chemistry

Background:

Microstrain and structural defects impede high-energy, long-life battery development.
The origins and impact of microstrain during battery material synthesis are poorly understood.

Purpose of the Study:

To investigate the role of microstrain during the synthesis of sodium layered oxide cathodes.
To elucidate the mechanisms governing microstrain accumulation and defect formation.

Main Methods:

Real-time microstrain screening during material synthesis.
Multiscale in situ synchrotron X-ray diffraction and microscopy characterization.

Main Results:

Spatial distribution of transition metals in precursor particles controls nanoscale phase transformation and local charge heterogeneity.
Transition metal dominance leads to unexpected outward propagation of defect nucleation and growth.
Identified key factors governing microstrain accumulation during synthesis.

Conclusions:

Rational synthesis strategies can reduce microstrain and crystallographic defects.
Improved structural stability and battery performance are achievable through defect control.
This work is a critical step towards synthesis-by-design of defect-less battery materials.