Self-compacting engineering to achieve high-performance lithium-rich layered oxides cathode materials

Yu, Zhaozhe; Lu, Quan; Wang, Yuezhen; Yu, Kangzhe; Li, Huacheng; Yang, Xiongqiang; Cheng, Yan; Xu, Fen; Sun, Lixian

doi:10.1016/j.apsusc.2023.156683

Cited by 8 publications

(2 citation statements)

References 45 publications

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“…8,9 LLO cathode material has a capacity of nearly 300 mAh g −1 and energy density of more than 1000 Wh kg 1− , which is a promising cathode material for lithium-ion batteries in the future. 10 Its high capacity is not only derived from the redox reactions of TM but also from the redox of anions (O 2− → O 2 n− ), which provides additional capacity. 11,12 However, the migration of TM causes phase transformation from a layered structure to a spinel phase.…”

Section: Introductionmentioning

confidence: 99%

“…Lithium-ion batteries have been increasingly used in electric devices and energy storage, but the current energy density of lithium-ion batteries is difficult to meet future development. − Cathode materials are the key to improving their energy density . Currently, commercialized cathode materials such as lithium cobaltate, lithium iron phosphate, and ternary materials are difficult to meet the needs of future development. , LLO cathode material has a capacity of nearly 300 mAh g –1 and energy density of more than 1000 Wh kg 1– , which is a promising cathode material for lithium-ion batteries in the future . Its high capacity is not only derived from the redox reactions of TM but also from the redox of anions (O 2– → O 2 n – ), which provides additional capacity. , However, the migration of TM causes phase transformation from a layered structure to a spinel phase.…”

Section: Introductionmentioning

confidence: 99%

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Multifunctional Ho₂O₃ Coating with Oxygen Vacancies Enables High-Performance Lithium-Rich Layered Oxide Cathodes

Zhang,

Zheng

et al. 2024

Energy Fuels

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Li-rich materials with exceptionally high specific capacity have great potential for the commercialization of cathode materials in the future. However, irreversible oxygen loss, transition metal (TM) dissolution, and structural degradation during cycling make the commercialization of Li-rich cathode materials difficult. Here, a uniform Ho2O3 coating was formed on the surface of Li-rich layered oxide (LLO) cathodes due to the good electrical conductivity and abundant oxygen vacancies of Ho2O3. The high conductivity of the material improves the kinetic performance. The modification layer effectively stabilizes the evolution of CEI during the long cycling process and inhibits the occurrence of irreversible side reactions. More importantly, the abundant oxygen vacancies effectively inhibited oxygen precipitation and enhanced the reversibility of anion redox. The charging and discharging processes of the material and the modification mechanism are deeply analyzed through a series of characterizations. The results show that the modification method effectively improves the electrochemical performance of the materials. The capacity loss of the Ho2O3-coated material is less than that of LLO after long cycling at 1C and 0.5C, and the discharge-specific capacity of the modified material can be increased to 158.1 mAh g–1 at 5C. This paper provides a new guiding path for the design of future high-voltage LLO materials.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multifunctional Ho₂O₃ Coating with Oxygen Vacancies Enables High-Performance Lithium-Rich Layered Oxide Cathodes

Zhang,

Zheng

et al. 2024

Energy Fuels

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Band Structure Engineering Promotes Anionic Redox Reversibility of Cobalt‐Free Li‐Rich Layered Oxides Cathodes

Gao,

Guo,

et al. 2024

Small

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Li‐rich layered oxides cathodes (LLOs) have prevailed as the promising high‐energy‐density cathode materials due to their distinctive anionic redox chemistry. However, uncontrollable anionic redox process usually leads to structural deterioration and electrochemical degradation. Herein, a Mo/Cl co‐doping strategy is proposed to regulate the relative position of energy band for modulating the anionic redox chemistry and strengthening the structural stability of Co‐free Li1.16Mn0.56Ni0.28O2 cathodes. The incorporation of Mo with high d state orbit and Cl with low electronegativity can narrow the band energy gap between bonding and antibonding bands via increasing the filled lower‐Hubbard band (LHB) and decreasing the non‐bonding O 2p energy bands, promoting the anionic redox reversibility. In addition, strong covalent Mo─O and Mn─Cl bonding further increases the covalency of Mn─O band to further stabilize the O2n− species and enhance the reversible distortion of MnO6 octahedron. The strengthening electronic conductivity, together with the epitaxial structure Li2MoO4 facilitates the fast Li+ kinetics. As a result, the dual doping material exhibits enhanced anionic redox reversibility and suppressed oxygen release with increased cyclic stability and excellent rate performance. This strategy provides some guidance to design high‐energy‐density LLOs with desirable anionic redox reversibility and stable crystal structure via band structure engineering.

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Ring-shaped all manganese-based lithium-rich oxide cathode with high performance and stability via biomineralization method

Shen,

Zhou,

Lin

et al. 2024

Applied Surface Science

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Self-compacting engineering to achieve high-performance lithium-rich layered oxides cathode materials

Cited by 8 publications

References 45 publications

Multifunctional Ho₂O₃ Coating with Oxygen Vacancies Enables High-Performance Lithium-Rich Layered Oxide Cathodes

Multifunctional Ho₂O₃ Coating with Oxygen Vacancies Enables High-Performance Lithium-Rich Layered Oxide Cathodes

Band Structure Engineering Promotes Anionic Redox Reversibility of Cobalt‐Free Li‐Rich Layered Oxides Cathodes

Ring-shaped all manganese-based lithium-rich oxide cathode with high performance and stability via biomineralization method

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Self-compacting engineering to achieve high-performance lithium-rich layered oxides cathode materials

Cited by 8 publications

References 45 publications

Multifunctional Ho2O3 Coating with Oxygen Vacancies Enables High-Performance Lithium-Rich Layered Oxide Cathodes

Multifunctional Ho2O3 Coating with Oxygen Vacancies Enables High-Performance Lithium-Rich Layered Oxide Cathodes

Band Structure Engineering Promotes Anionic Redox Reversibility of Cobalt‐Free Li‐Rich Layered Oxides Cathodes

Ring-shaped all manganese-based lithium-rich oxide cathode with high performance and stability via biomineralization method

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Multifunctional Ho₂O₃ Coating with Oxygen Vacancies Enables High-Performance Lithium-Rich Layered Oxide Cathodes

Multifunctional Ho₂O₃ Coating with Oxygen Vacancies Enables High-Performance Lithium-Rich Layered Oxide Cathodes