From metal to cathode material: <i>in situ</i> formation of LiCoO<sub>2</sub> with enhanced cycling performance and suppressed phase transition

Cao, Longhao; Wang, Hui; Guo, Ziyu; Zhang, Jing; Zhang, Xiaosong; Peng, Cancan; Yu, Jingxiong; Cheng, Ya‐Jun; Xia, Yonggao

doi:10.1039/d3ta00999h

J. Mater. Chem. A

2023

DOI: 10.1039/d3ta00999h

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From metal to cathode material: in situ formation of LiCoO₂ with enhanced cycling performance and suppressed phase transition

Longhao Cao

Hui Wang

Ziyu Guo

et al.

Abstract: LiCoO2 (LCO) has attracted wide attention due to its high energy density, whose synthesis relies on the cobalt oxide precursor. The conventional synthetic method is featured with low yield. What...

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2024

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Diffusion‐Optimized Long Lifespan 4.6 V LiCoO₂: Homogenizing Cycled Bulk‐To‐Surface Li Concentration with Reduced Structure Stress

Wu,

Ran,

Wang

et al. 2024

Advanced Science

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Increasing the charging cut‐off voltage (e.g., 4.6 V) to extract more Li ions are pushing the LiCoO2 (LCO) cathode to achieve a higher energy density. However, an inhomogeneous cycled bulk‐to‐surface Li distribution, which is closely associated with the enhanced extracted Li ions, is usually ignored, and severely restricts the design of long lifespan high voltage LCO. Here, a strategy by constructing an artificial solid–solid Li diffusion environment on LCO's surface is proposed to achieve a homogeneous bulk‐to‐surface Li distribution upon cycling. The diffusion optimized LCO not only shows a highly reversible capacity of 212 mA h g−1 but also an ultrahigh capacity retention of 80% over 600 cycles at 4.6 V. Combined in situ X‐ray diffraction measurements and stress‐evolution simulation analysis, it is revealed that the superior 4.6 V long‐cycled stability is ascribed to a reduced structure stress leaded by the homogeneous bulk‐to‐surface Li diffusion. This work broadens approaches for the design of highly stable layered oxide cathodes with low ion‐storage structure stress.

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Diffusion‐Optimized Long Lifespan 4.6 V LiCoO₂: Homogenizing Cycled Bulk‐To‐Surface Li Concentration with Reduced Structure Stress

Wu,

Ran,

Wang

et al. 2024

Advanced Science

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Ti3C2T MXene in-situ transformed Li2TiO3 interface layer enabling 4.5 V-LiCoO2/sulfide all-solid-state lithium batteries with superior rate capability and cyclability

Wang

Yuan

et al. 2024

Chinese Chemical Letters

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From metal to cathode material: in situ formation of LiCoO₂ with enhanced cycling performance and suppressed phase transition

Abstract: LiCoO2 (LCO) has attracted wide attention due to its high energy density, whose synthesis relies on the cobalt oxide precursor. The conventional synthetic method is featured with low yield. What...

Cited by 2 publications

References 46 publications

Diffusion‐Optimized Long Lifespan 4.6 V LiCoO₂: Homogenizing Cycled Bulk‐To‐Surface Li Concentration with Reduced Structure Stress

Diffusion‐Optimized Long Lifespan 4.6 V LiCoO₂: Homogenizing Cycled Bulk‐To‐Surface Li Concentration with Reduced Structure Stress

Ti3C2T MXene in-situ transformed Li2TiO3 interface layer enabling 4.5 V-LiCoO2/sulfide all-solid-state lithium batteries with superior rate capability and cyclability

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From metal to cathode material: in situ formation of LiCoO2 with enhanced cycling performance and suppressed phase transition

Abstract: LiCoO2 (LCO) has attracted wide attention due to its high energy density, whose synthesis relies on the cobalt oxide precursor. The conventional synthetic method is featured with low yield. What...

Cited by 2 publications

References 46 publications

Diffusion‐Optimized Long Lifespan 4.6 V LiCoO2: Homogenizing Cycled Bulk‐To‐Surface Li Concentration with Reduced Structure Stress

Diffusion‐Optimized Long Lifespan 4.6 V LiCoO2: Homogenizing Cycled Bulk‐To‐Surface Li Concentration with Reduced Structure Stress

Ti3C2T MXene in-situ transformed Li2TiO3 interface layer enabling 4.5 V-LiCoO2/sulfide all-solid-state lithium batteries with superior rate capability and cyclability

Contact Info

Product

Resources

About

From metal to cathode material: in situ formation of LiCoO₂ with enhanced cycling performance and suppressed phase transition

Diffusion‐Optimized Long Lifespan 4.6 V LiCoO₂: Homogenizing Cycled Bulk‐To‐Surface Li Concentration with Reduced Structure Stress

Diffusion‐Optimized Long Lifespan 4.6 V LiCoO₂: Homogenizing Cycled Bulk‐To‐Surface Li Concentration with Reduced Structure Stress