Enhancing the stability of Li-Rich Mn-based oxide cathodes through surface high-entropy strategy

Yang, Yali; Cai, Junfei; Zuo, Yuxuan; Zhang, Kun; Gao, Chuan; Zhou, Limin; Chen, Zhenhua; Chu, Wangsheng; Xia, Dingguo

doi:10.1016/j.ensm.2024.103587

Energy Storage Materials

2024

DOI: 10.1016/j.ensm.2024.103587

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Enhancing the stability of Li-Rich Mn-based oxide cathodes through surface high-entropy strategy

Yali Yang,

Junfei Cai,

Yuxuan Zuo

et al.

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2024

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Cited by 6 publications

References 33 publications

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A Collaboration of Interfacial Engineering and Particle Assembly Enables Highly Stable Li‐Rich Layered Cathodes for Li‐ion Batteries

Li,

Yin,

Shu

et al. 2024

Adv Funct Materials

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Lithium‐rich layered oxide cathodes (LLO) are renowned for their high specific capacity (>250 mAh g−¹) and have emerged as promising candidates for lithium‐ion batteries. However, significant capacity fades and voltage decay pose challenges to their commercialization, primarily due to the degradation of their original structure. In this study, a simple and rapid approach is presented that combines interfacial engineering and particle assembly to achieve a highly stable LLO cathode. This cathode features a single‐crystal LLO reassembled into a porous microsphere structure, along with a surface coating of polypropylene phosphate amide (PPA) formed through in situ cross‐linking of polyacrylic acid and ammonium polyphosphate, and a deuterogenic spinel interface layer. The dual protective coatings‐PPA and spinel‐effectively inhibit the dissolution of transition metals, delay structural deterioration, and enhance lithium‐ion diffusion. Additionally, the cross‐linked PPA layer strengthens the interconnection among LLO nanoparticles, improving the stability of the assembled microsphere structures while mitigating electrolyte corrosion. Consequently, the LLO@PPA electrode exhibits excellent capacity retention of 84.87% over 500 cycles at 0.5 C and shows significant improvements in rate performance. This work offers an effective modification strategy for developing next‐generation lithium‐rich cathodes with enhanced rate capacity and cycle life.

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A Collaboration of Interfacial Engineering and Particle Assembly Enables Highly Stable Li‐Rich Layered Cathodes for Li‐ion Batteries

Li,

Yin,

Shu

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

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Recent Advances in High‐Entropy Layered Oxide Cathode Materials for Alkali Metal‐Ion Batteries

Duan,

Zhang,

Tang

et al. 2024

Advanced Materials

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Since the electrochemical de/intercalation behavior is first detected in 1980, layered oxides have become the most promising cathode material for alkali metal‐ion batteries (Li+/Na+/K+; AMIBs) owing to their facile synthesis and excellent theoretical capacities. However, the inherent drawbacks of unstable structural evolution and sluggish diffusion kinetics deteriorate their electrochemical performance, limiting further large‐scale applications. To solve these issues, the novel and promising strategy of high entropy has been widely applied to layered oxide cathodes for AMIBs in recent years. Through multielement synergy and entropy stabilization effects, high‐entropy layered oxides (HELOs) can achieve adjustable activity and enhanced stability. Herein, the basic concepts, design principles, and synthesis methods of HELO cathodes are introduced systematically. Notably, it explores in detail the improvements of the high‐entropy strategy on the limitations of layered oxides, highlighting the latest advances in high‐entropy layered cathode materials in the field of AMIBs. In addition, it introduces advanced characterization and theoretical calculations for HELOs and proposes potential future research directions and optimization strategies, providing inspiration for researchers to develop advanced HELO cathode materials in the areas of energy storage and conversion.

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Expandable Fast Li‐Ion Diffusion Network of Li‐Rich Mn‐Based Oxides via Single‐Layer LiCo(Ni)O₂ Segregation

Yang,

Luo,

Zuo

et al. 2024

Advanced Materials

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Li‐rich Mn‐based cathode materials exhibit a remarkable reversible specific capacity exceeding 250 mAh g−1, positioning them as the preferred choice for the next generation of high‐energy density lithium‐ion battery cathode materials. However, their inferior rate and cycling performance pose significant challenges. In this context, a Li‐rich material incorporating an expanded fast Li‐ion diffusion network has been successfully synthesized. This advancement involves the introduction of a single‐layer of LiCo(Ni)O2 with high Li‐ion diffusion coefficients into the crystal structure of Li‐rich cathode, thereby enhancing the rate performance, achieving an impressive capacity of 212 mAh g−1 at 5 C. Furthermore, the single‐layer LiCo(Ni)O2 can effectively isolates Li2MnO3 phase domains, thereby enhancing the structural stability during the anion redox process, consequently extending the electrochemical stability limits. Operating within a voltage range of 2.1–4.6 V, the capacity retention reaches 80% after 400 cycles, with a voltage decay of merely 0.74 mV per cycle. This innovative utilization of an expanded fast Li‐ion diffusion network provides invaluable insights that will guide the development of strategies aimed at unlocking rate capability in layered oxide cathode materials.

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Enhancing the stability of Li-Rich Mn-based oxide cathodes through surface high-entropy strategy

Cited by 6 publications

References 33 publications

A Collaboration of Interfacial Engineering and Particle Assembly Enables Highly Stable Li‐Rich Layered Cathodes for Li‐ion Batteries

A Collaboration of Interfacial Engineering and Particle Assembly Enables Highly Stable Li‐Rich Layered Cathodes for Li‐ion Batteries

Recent Advances in High‐Entropy Layered Oxide Cathode Materials for Alkali Metal‐Ion Batteries

Expandable Fast Li‐Ion Diffusion Network of Li‐Rich Mn‐Based Oxides via Single‐Layer LiCo(Ni)O₂ Segregation

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Resources

About

Enhancing the stability of Li-Rich Mn-based oxide cathodes through surface high-entropy strategy

Cited by 6 publications

References 33 publications

A Collaboration of Interfacial Engineering and Particle Assembly Enables Highly Stable Li‐Rich Layered Cathodes for Li‐ion Batteries

A Collaboration of Interfacial Engineering and Particle Assembly Enables Highly Stable Li‐Rich Layered Cathodes for Li‐ion Batteries

Recent Advances in High‐Entropy Layered Oxide Cathode Materials for Alkali Metal‐Ion Batteries

Expandable Fast Li‐Ion Diffusion Network of Li‐Rich Mn‐Based Oxides via Single‐Layer LiCo(Ni)O2 Segregation

Contact Info

Product

Resources

About

Expandable Fast Li‐Ion Diffusion Network of Li‐Rich Mn‐Based Oxides via Single‐Layer LiCo(Ni)O₂ Segregation