Unravelling the Nature of the Intrinsic Complex Structure of Binary‐Phase Na‐Layered Oxides (Adv. Mater. 29/2022)

Paidi, Anil Kumar; Park, Woon Bae; Ramakrishnan, P.; Lee, Seong‐Hun; Lee, Jin‐Woong; Lee, Kug‐Seung; Ahn, Hyungju; Liu, Tongchao; Gim, Jihyeon; Avdeev, Maxim; Pyo, Myoungho; Sohn, Jung Inn; Amine, Khalil; Sohn, Kee‐Sun; Shin, Tae Joo; Ahn, Docheon; Lu, Jun

doi:10.1002/adma.202270218

Cited by 11 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A series of P2/O3 mixed‐phase intergrowth layered cathode materials were synthesized by optimizing the Na content (combining P2‐Na 0.7 [Ni 0.20 Fe 0.40 Mn 0.40 ]O 2 and O3‐Na[Ni 0.20 Fe 0.40 Mn 0.40 ]O 2 ). [ 234 ] In‐situ XRD results showed that the optimized biphasic cathode undergoes a reversible phase transition and negligible volume change during cycling, thereby providing high reversible capacity (171.5 mA h g −1 ) and improved cycling stability (64% capacity retention after 100 cycles at 0.1C) over a wide voltage window of 1.5–4.5 V.…”

Section: O3‐tye Layered Oxide Cathodesmentioning

confidence: 99%

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

Liang,

Hwang,

Sun

2023

Advanced Energy Materials

View full text Add to dashboard Cite

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.

show abstract

Section: O3‐tye Layered Oxide Cathodesmentioning

confidence: 99%

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

Liang,

Hwang,

Sun

2023

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

“…Changing the sodium content has a significant effect on the crystal structure [105,106] . As the sodium content increases, the crystal structure of Na x Ni 0.20 Fe 0.40 Mn 0.40 O 2 changes from a pure P2 phase ( x =0.60) to a composite structure of P2 and O3 phases ( x =0.74, 0.76 and 0.78) and eventually becomes a pure O3 phase ( x =0.84) (Figure 5a).…”

Section: Electrochemical Performancementioning

confidence: 99%

“…As the sodium content increases, the crystal structure of Na x Ni 0.20 Fe 0.40 Mn 0.40 O 2 changes from a pure P2 phase ( x =0.60) to a composite structure of P2 and O3 phases ( x =0.74, 0.76 and 0.78) and eventually becomes a pure O3 phase ( x =0.84) (Figure 5a). [105] The results of HRPD and NDP determine that Na 0.76 Ni 0.20 Fe 0.40 Mn 0.40 O 2 is composed of 18.37 wt% P2‐Na 0.6 [Ni 0.20 Fe 0.40 Mn 0.40 ]O 2 and 81.63 wt% O3‐Na 0.84 [Ni 0.20 Fe 0.40 Mn 0.40 ]O 2 , indicating that the vacancy concentration of the Na ions is not uniform. P2/O3‐Na 0.76 Ni 0.20 Fe 0.40 Mn 0.40 O 2 exhibits an initial discharge capacity of 171.5 mAh g −1 and the capacity retention of 64 % after 100 cycles between 1.5–4.5 V at 0.1 C on the basis of Ni 2+ /Ni 4+ and Fe 3+ /Fe 4+ redox couples (Figure 5b), compared to 118.5 mAh g −1 and 78 % between 2.0–4.2 V. A series of Na 0.9− x Ni 0.45 Mn 0.55 O 2 ( x =0.02, 0.04 and 0.08) with different sodium content were synthesized using the sol‐gel method [106] .…”

Section: Electrochemical Performancementioning

confidence: 99%

“…Similarly, some studies have compared the performance of composite oxide cathode materials and single‐phase cathode materials [49,58,105,108,128,149] . For example, the single‐phase materials P2‐Na 2/3 Ni 1/3 Mn 0.57 Ti 0.1 O 2 and O3‐NaNi 1/3 Fe 1/3 Mn 1/3 O 2 were prepared by Wang et al .…”

Section: Electrochemical Performancementioning

confidence: 99%

“…Moreover, the anode (e. g., hard carbon) of SIBs full cells in practical application often irreversibly consume part of sodium ions from the cathode materials. One characteristic of P2/O3 composite structure materials is its relatively high sodium content (0.75–0.85), [49,58,64,105–109] making them more suitable for full cells, which provides an effective solution to this problem. However, as previously stated, the synthesis method can have an important impact on the crystal structure.…”

Section: Summary and Prospectsmentioning

confidence: 99%

See 2 more Smart Citations

Sodium Composite Oxide Cathode Materials:Phase Regulation, Electrochemical Performance and Reaction Mechanism

Zhu

Wang

et al. 2022

Batteries & Supercaps

View full text Add to dashboard Cite

The abundance of sodium resources provides the basis for the large‐scale application of sodium‐ion batteries (SIBs) in the field of energy storage. Among the cathode candidates for SIBs, oxide materials stand out because of their ease of synthesis, environmental friendliness and high capacity. According to the crystal structure, oxide cathode materials can be mainly classified as P2, P3, O3 and tunnel phases. Benefiting from the combined advantages of different phases, composite oxide cathode materials have been widely studied due to the enhanced both cycling and rate performance. In this review, we analyzed the three key issues of phase regulation, electrochemical performance and reaction mechanism based on the recent progress for composite oxide cathode materials. The composite oxide cathode materials will be one of the most competitive and attractive cathodes for SIBs.

show abstract

Recent Advances in Mn‐Rich Layered Materials for Sodium‐Ion Batteries

Wang

Zhuo

Wang

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

Branded with low cost and a high degree of safety, with an ambitious aim of substituting lithium-ion batteries in many fields, sodium-ion batteries have received fervid attention in recent years after being dormant for decades. Layered materials are a major focus of study owing to the extensive experience already gained in lithium-ion batteries, and the pursuit of a Mn-rich composition is critical to reduce the cost while retaining the performance. This review provides a timely update of the recent progress of Mn-rich layered materials for sodium-ion batteries based on the understandings of the phase forming principles, structure transformation upon cycling and charge compensation mechanisms and discusses potential ambiguities in the pursuit of high-performance materials.

show abstract

Unravelling the Nature of the Intrinsic Complex Structure of Binary‐Phase Na‐Layered Oxides (Adv. Mater. 29/2022)

Cited by 11 publications

References 0 publications

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

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

Sodium Composite Oxide Cathode Materials:Phase Regulation, Electrochemical Performance and Reaction Mechanism

Recent Advances in Mn‐Rich Layered Materials for Sodium‐Ion Batteries

Contact Info

Product

Resources

About