Degradation, Intrinsic Microstrains, and Phase Structure Engineering in Lithium-Rich Oxide Cathode Materials

Owing to anionic oxygen redox, cathode materials containing lithium-rich oxides (LROs) exhibit a large discharge capacity exceeding 300 mAh/g. This makes them viable choices for fabrication of cathode materials for future development of lithium-ion batteries with an energy density exceeding 500 Wh/kg. However, O redox is irreversible, resulting in voltage/capacity fade with precipitation of lattice oxygen during cycling. In this work, we review the mechanism of O redox, the role of intrinsic microstrains and potential defects in O redox, and strategies to achieve a reversible O redox through artificial engineering of these intrinsic microstrains and defects. We also evaluate facile and simple methods that are effective to modify these microstrains through engineering of phase distribution, phase structure, and morphology, as well as methods for modification of intrinsic defects, so that discharge capacity can also be improved. This work provides routes to achieve high-performance LROs with a long lifespan.

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Publication Details

Journal
ACS Energy Letters
Published
2024-12-03
DOI
https://doi.org/10.1021/acsenergylett.4c02980
Citations
9
Primary Topic
Advancements in Battery Materials
Type
article
Field-Weighted Citation Impact
1.88

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article

Degradation, Intrinsic Microstrains, and Phase Structure Engineering in Lithium-Rich Oxide Cathode Materials

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9 citations
ACS Energy Letters
Advancements in Battery Materials
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article

Degradation, Intrinsic Microstrains, and Phase Structure Engineering in Lithium-Rich Oxide Cathode Materials

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article en
9 citations

Abstract

Owing to anionic oxygen redox, cathode materials containing lithium-rich oxides (LROs) exhibit a large discharge capacity exceeding 300 mAh/g. This makes them viable choices for fabrication of cathode materials for future development of lithium-ion batteries with an energy density exceeding 500 Wh/kg. However, O redox is irreversible, resulting in voltage/capacity fade with precipitation of lattice oxygen during cycling. In this work, we review the mechanism of O redox, the role of intrinsic microstrains and potential defects in O redox, and strategies to achieve a reversible O redox through artificial engineering of these intrinsic microstrains and defects. We also evaluate facile and simple methods that are effective to modify these microstrains through engineering of phase distribution, phase structure, and morphology, as well as methods for modification of intrinsic defects, so that discharge capacity can also be improved. This work provides routes to achieve high-performance LROs with a long lifespan.

ACS Energy LettersVol. 9(12)
Xi'an Technological University (CN), Zhejiang University (CN)
Young Scientists Fund, National Key Research and Development Program of China
Affordable and clean energy
Openalex Percentile: Top 14%
Advancements in Battery Materials
1.88
DOISourceOpenAlex
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