High‐Entropy and Superstructure‐Stabilized Layered Oxide Cathodes for Sodium‐Ion Batteries

Yao, Libing; Zou, Peichao; Wang, Chunyang; Jiang, Jiahao; Ma, Lu; Tan, Sha; Beyer, Kevin A.; Xing, Feng; Hu, Enyuan; Xin, Huolin L.

doi:10.1002/aenm.202201989

Cited by 129 publications

(75 citation statements)

References 35 publications

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“…It should be mentioned that some HE O3-type cathodes can deliver higher capacity when cycled in a wider voltage range but at the expense of the cycling performance. For example, under the voltage window of 2.0–4.5 V, the O3-Na 2/3 Li 1/6 Fe 1/6 Co 1/6 Ni 1/6 Mn 1/3 O 2 cathode delivers a capacity of 171 mAh/g but suffers from the fast capacity decay (89.3% capacity retention at 1 C for 90 cycles) . Therefore, the excellent rate capabilities and superior cycle stability prove that the O3-type NCMZFAMTS cathode is a promising cathode for SIBs with a long operation life.…”

Section: Resultsmentioning

confidence: 99%

Slight Multielement Doping-Induced Structural Order–Disorder Transition for High-Performance Layered Na-Ion Oxide Cathodes

Guo

Zhao

Gao

et al. 2023

ACS Appl. Mater. Interfaces

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To realize concurrently the high-energy density and excellent cycling stability, maximum utilization of redox couple, minimization of detrimental phase transition, and structural degradation of O3-type layered oxide cathodes are critical for developing Na-ion batteries. Ni2+/Ni4+ redox couple showing multielectron reaction and higher redox potential is favorable to increase the energy density. However, the Jahn-Teller distortion of Ni3+ generated upon (dis)charging results in a strong anisotropy in the local crystal structure that causes irreversible interlayer bending and chemo-mechanical cracks of the cathode particles, compromising the electrochemical properties eventually. In this work, we show a slight multielement doping strategy that enlarges the amount of active redox components while minimizing the inactive contents. The results show that the uniform distribution of multiple components can help increase the disorder degree of atom arrangement and alleviate the structural changes and detrimental anisotropy cracks. As a proof of concept, a multielement-doped O3-type Na0.9Ni0.25Cu0.05Mg0.05Zn0.05Fe0.05Al0.05Mn0.40Ti0.05Sn0.05O2 oxide is rationally prepared that presents better chemo-mechanical stability and delayed O3-P3 phase transition behavior. Compared to the high Ni-content Na0.9Ni0.35Fe0.2Mn0.45O2 cathode, this as-prepared multielement material delivers a reversible capacity of about 120 mAh/g in the voltage range of 2–4.0 V, superior cycling stability with 90% of capacity retention after 500 cycles, and excellent rate capability (more than 70% of initial capacity at 5.0 C). This work indicates that the multielement doping method is highly suitable for the development of advanced Na-ion layered oxide cathodes.

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Section: Resultsmentioning

confidence: 99%

Slight Multielement Doping-Induced Structural Order–Disorder Transition for High-Performance Layered Na-Ion Oxide Cathodes

Guo

Zhao

Gao

et al. 2023

ACS Appl. Mater. Interfaces

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“…the high Na-ion diffusion kinetics (Figure 8c). [208,209] It is necessary to further clarify the optimal compositions and phase transition processes of high-entropy oxides. Recently, a novel layered cathode material, NaNi 0.1 Mn 0.15 Co 0.2 Cu 0.1 Fe 0.1 Li 0.1 Ti 0.15 Sn 0.1 O 2 , was developed via high-entropy substitution, where Ni, Co, and Mn provide charge compensation, Fe, Cu, and Ti serve as stabilizers, Li alleviates lattice distortion, and Sn increases the working potential.…”

Section: High-entropy Compoundsmentioning

confidence: 99%

Practical Cathodes for Sodium‐Ion Batteries: Who Will Take The Crown?

Liang,

Hwang,

Sun

2023

Advanced Energy Materials

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In recent decades, sodium‐ion batteries (SIBs) have received increasing attention because they offer cost and safety advantages and avoid the challenges related to limited lithium/cobalt/nickel resources and environmental pollution. Because the sodium storage performance and production cost of SIBs are dominated by the cathode performance, developing cathode materials with large‐scale production capacity is the key to achieving commercial applications of SIBs. Therefore, developing host materials with high energy density, long cycling life, low production cost, and high chemical/environmental stability is crucial for implementing advanced SIBs. Among the developed cathode materials for SIBs, O3‐type sodiated transition‐metal oxides have attracted extensive attention owing to their simple synthesis methods, high theoretical specific capacity, and sufficient Na content. However, the relatively large Na‐ion radius leads to sluggish diffusion kinetics and inevitable complex phase transitions during the deintercalation/intercalation process, resulting in poor rate capability and cycling stability. Therefore, this review comprehensively summarizes the research progress and modification strategies for O3‐type cathodes, including the component design, surface modification, and optimization of synthesis methods. This work aims to guide the development of commercial layered oxides and provide technical support for the next generation of energy‐storage systems.

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“…Moreover, the HEO layered skeleton structure enhances the Na + transport kinetics and inhibits structural fatigue and TM dissolution in the crystal. Xu et al 96 used a Li-substitution strategy to design a high-entropy, superlattice stabilised O3-type layered cathode, which enables a fast and reversible O3-P3 phase transition in the low-voltage region, while phase transition and redox are effectively suppressed in the high-voltage region. Even after 100 cycles at 1 C at a high charge cut-off voltage of 4.5 V, the capacity retention rate is still 89.3%.…”

Section: Element Dopingmentioning

confidence: 99%

Structural and electrochemical progress of O3-type layered oxide cathodes for Na-ion batteries

Ma¹,

Yang²,

Xu³

et al. 2023

Nanoscale

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High‐Entropy and Superstructure‐Stabilized Layered Oxide Cathodes for Sodium‐Ion Batteries

Cited by 129 publications

References 35 publications

Slight Multielement Doping-Induced Structural Order–Disorder Transition for High-Performance Layered Na-Ion Oxide Cathodes

Slight Multielement Doping-Induced Structural Order–Disorder Transition for High-Performance Layered Na-Ion Oxide Cathodes

Practical Cathodes for Sodium‐Ion Batteries: Who Will Take The Crown?

Structural and electrochemical progress of O3-type layered oxide cathodes for Na-ion batteries

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