Sodium‐Ion Batteries: O3‐Type Layered Ni‐Rich Oxide: A High‐Capacity and Superior‐Rate Cathode for Sodium‐Ion Batteries (Small 52/2019)

Yang, Jun; Tang, Manjing; Líu, Hao; Chen, Xueying; Xu, Zhanwei; Huang, Jianfeng; Su, Qingmei; Xia, Yongyao

doi:10.1002/smll.201970282

Cited by 7 publications

(4 citation statements)

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“…Along with further charging, as the phase transition progresses, a new peak representing the hexagonal P3 phase appears. 45 For NFM900, the phase transition follows a biphasic reaction pattern where the P3 diffraction emerges before the O3 diffraction completely vanishes (Figure 4b,c). During this process, the interlayer spacing expands from 5.38 to 5.64 Å.…”

Section: Resultsmentioning

confidence: 98%

“…The (104) O3 peak shifts to a higher angle since the in-plane TM–TM bond length decreases, suggesting the oxidation of transition metals. Along with further charging, as the phase transition progresses, a new peak representing the hexagonal P3 phase appears . For NFM900, the phase transition follows a biphasic reaction pattern where the P3 diffraction emerges before the O3 diffraction completely vanishes (Figure b,c).…”

Section: Resultsmentioning

confidence: 99%

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Phase Transition Modulated by Grain Size and Lattice Distortion in Layered Transition Metal Oxide for Sodium-Ion Batteries

Yang,

Zhang,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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Low-cost sodium-ion batteries have demonstrated great prospects in energy storage, among which layered transition metal oxides hold great potential as a cathode material. However, the notorious phase transition in layered cathode materials has greatly hampered their cycle life due to large volume changes upon desodiation/sodiation. In this study, by adopting an O3-type NaNi 1/3 Fe 1/3 Mn 1/3 O 2 (NFM) with controlled synthesis temperatures, we have revealed that the grain size is closely related to its phase transition behaviors. The layered material with a smaller grain size and more distorted lattice tends to experience a shorter plateau of the O3−P3−O3 phase transitions during the charge/ discharge process. Despite having a lower nominal discharge capacity without the phase transition plateau, its cycling stability increases from 77.4% to 96.2% after 100 cycles with greatly reduced intragranular cracks. The smaller grain size and lattice distortion act as a barrier that prevents the smooth layer from gliding upon sodium intercalation and deintercalation. This study focuses on the influence of grain size on battery cycle stability and provides a basis for future analysis of the structural instability of layered materials.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Phase Transition Modulated by Grain Size and Lattice Distortion in Layered Transition Metal Oxide for Sodium-Ion Batteries

Yang,

Zhang,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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“…[35] LOCs are typically categorized into P2 and O3 phases based on the relative orientation of adjacent metal oxide layers and the stacking order. The c) The relationship between energy density and voltage of four representative LOCs (NNFM, NNCM, [18][19][20] NNMT, [21,22] and NCFM [23][24][25] ), emphasizing the need to increase the charging cutoff voltage of the material to achieve higher energy density. d) The relationship between energy density and cycling stability of LOCs.…”

Section: Introductionmentioning

confidence: 99%

Toward the High‐Voltage Stability of Layered Oxide Cathodes for Sodium‐Ion Batteries: Challenges, Progress, and Perspectives

Chen,

Deng,

Kong

et al. 2024

Advanced Materials

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Sodium‐ion batteries (SIBs) have garnered significant attention as ideal candidates for large‐scale energy storage due to their notable advantages in terms of resource availability and cost‐effectiveness. However, there remains a substantial energy density gap between SIBs and commercially available lithium‐ion batteries (LIBs), posing challenges to meeting the requirements of practical applications. The fabrication of high‐energy cathodes has emerged as an efficient approach to enhance the energy density of SIBs, which commonly requires cathodes operating in high‐voltage regions. Layered oxide cathodes (LOCs), with low cost, facile synthesis, and high theoretical specific capacity, have emerged as one of the most promising candidates for commercial applications. However, LOCs encounter significant challenges when operated in high‐voltage regions such as irreversible phase transitions, migration and dissolution of metal cations, loss of reactive oxygen, and the occurrence of serious interfacial parasitic reactions. These issues ultimately result in severe degradation in battery performance. This review aims to shed light on the key challenges and failure mechanisms encountered by LOCs when operated in high‐voltage regions. Additionally, the corresponding strategies for improving the high‐voltage stability of LOCs are comprehensively summarized. By providing fundamental insights and valuable perspectives, this review aims to contribute to the advancement of high‐energy SIBs.This article is protected by copyright. All rights reserved

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“…In SIBs, the cathode material is a predominant factor governing the energy density, cycling life, and cost. In particular, much attention has been paid by scientists to layered oxide cathodes with the general formula of Na x TMO 2 (generally 0.6 ≤ x ≤ 1) due to their potential high energy density, which are further classified as P2, − P3, − and O3 − types according to different sodium environments (prismatic (P) and octahedral (O) sites) and oxygen packing forms. Moreover, it is well-known that sodium ions in the P2-type structure generally have a relatively lower migration barrier than those in the P3- and O3-type structures. , Among existing P2-type oxides, Na 0.66 Ni 0.33 Mn 0.67 O 2 is considered very appealing in terms of high voltage, relatively good air stability, and easy preparation.…”

Section: Introductionmentioning

confidence: 99%

Stabilizing P2-Type Ni–Mn Oxides as High-Voltage Cathodes by a Doping-Integrated Coating Strategy Based on Zinc for Sodium-Ion Batteries

Zhang

Liao

et al. 2021

ACS Appl. Mater. Interfaces

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The key to development of high-voltage P2-type Na 0.66 Ni 0.33 Mn 0.67 O 2 is the modification methods that can effectively improve its electrochemical reversibility. Herein, a doping-integrated coating strategy based on zinc element is proposed to modify P2-type Na 0.66 Ni 0.33 Mn 0.67 O 2 , which can be achieved by a facile one-step solid-state reaction. The formation mechanism of Na 0.66 Ni 0.26 Zn 0.07 Mn 0.67 O 2 @0.06ZnO (NNZM@ 0.06ZnO) is investigated, revealing that the spinel and P3 intermediate phases appear prior to the formation of the P2 phase. Ni 2+ can be preferentially incorporated into the P2 structure in competition with Zn 2+ at high temperature, resulting in a uniform enrichment of ZnO on the surface. A small amount of Zn 2+ doping significantly suppresses the Na + /vacancy ordering effect and improves the structural reversibility. Furthermore, the electrolyte decomposition is effectively reduced because of the presence of the ZnO coating layer, leading to the formation of a thin cathode electrolyte interphase film that is favorable to fast Na + diffusion. In virtue of the Zn 2+ doping and in situ formed ZnO coating, NNZM@0.06ZnO exhibits excellent cycling stability with a capacity retention of 83.7% after 100 cycles at 100 mA g −1 and rate performance with a discharge capacity of 56.4 mAh g −1 at 2000 mA g −1 , which significantly outperforms the uncoated Na 0.66 Ni 0.26 Zn 0.07 Mn 0.67 O 2 and the Na 0.66 Ni 0.26 Zn 0.07 Mn 0.67 O 2 /0.06ZnO with the coating layer introduced by mechanical milling. This work provides a new strategy to design high-performance cathode materials for sodium-ion batteries.

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Sodium‐Ion Batteries: O3‐Type Layered Ni‐Rich Oxide: A High‐Capacity and Superior‐Rate Cathode for Sodium‐Ion Batteries (Small 52/2019)

Cited by 7 publications

References 0 publications

Phase Transition Modulated by Grain Size and Lattice Distortion in Layered Transition Metal Oxide for Sodium-Ion Batteries

Phase Transition Modulated by Grain Size and Lattice Distortion in Layered Transition Metal Oxide for Sodium-Ion Batteries

Toward the High‐Voltage Stability of Layered Oxide Cathodes for Sodium‐Ion Batteries: Challenges, Progress, and Perspectives

Stabilizing P2-Type Ni–Mn Oxides as High-Voltage Cathodes by a Doping-Integrated Coating Strategy Based on Zinc for Sodium-Ion Batteries

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