Unraveling vacancy-induced oxygen redox reaction and structural stability in Na-based layered oxides

Islam, M. Saif; Akbar, Muhammad; Han, Daseul; Ali, Basit; Choi, Yong Jeong; Lee, Jaewoon; Choi, Gwanghyeon; Park, Jae Ho; Kim, Jiyoung; Jung, Hun‐Gi; Chung, Kyung Yoon; Kim, Duho; Kang, Yong‐Mook; Nam, Kyung‐Wan

doi:10.1016/j.cej.2021.133962

Cited by 15 publications

(13 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Na 2/3 MnO 2 , CN of the second shell is 6, identical to the theoretical value without Mn vacancy. While for Na 2/3 [& 1/6 Mn 5/6 ]O 2 , it was determined to be 5.35, confirming vacancies in TM sites, [42] as seen in Figure 5c.…”

Section: X-ray Absorption Spectroscopy (Xas) and Pdfmentioning

confidence: 66%

“…which is a vital strategy to obtain reversible oxygen activity in layered cathode materials. [42] Besides P2-layered cathode materials, introducing TM vacancies in P3-type compounds have also been reported. Armstrong's group [43,44]…”

Section: P-type Layered Oxide Materialsmentioning

confidence: 99%

Section: Triclinic Na 2 Mn 3 O 7 -Type Materialsmentioning

confidence: 99%

Section: Aberration Corrected Scanning Transmission Electron Microsco...mentioning

confidence: 99%

mentioning

confidence: 99%

See 4 more Smart Citations

Transition Metal Vacancy in Layered Cathode Materials for Sodium‐Ion Batteries

Zhou

2023

Chemistry A European J

View full text Add to dashboard Cite

Anionic redox has been considered as a promising strategy to break the capacity limitation of cathode materials that solely relies on the intrinsic cationic redox in secondary batteries. Vacancy, as a kind of defect, can be introduced into transition metal layer to trigger oxygen redox, thus enhancing the energy density of layer-structured cathode materials for sodium-ion batteries. Herein, the formation process, recent progress in working mechanisms of triggering oxygen redox, as well as advanced characterization techniques for transition metal (TM) vacancy were overviewed and discussed. Strategies applied to stabilize the vacancy contained structures and harness the reversible oxygen redox were summarized. Furthermore, the challenges and prospects for further understanding TM vacancy were particularly emphasized.

show abstract

Section: X-ray Absorption Spectroscopy (Xas) and Pdfmentioning

confidence: 66%

Section: P-type Layered Oxide Materialsmentioning

confidence: 99%

Section: Triclinic Na 2 Mn 3 O 7 -Type Materialsmentioning

confidence: 99%

Section: Aberration Corrected Scanning Transmission Electron Microsco...mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Transition Metal Vacancy in Layered Cathode Materials for Sodium‐Ion Batteries

Zhou

2023

Chemistry A European J

View full text Add to dashboard Cite

show abstract

Unleashing the Potential of Sodium‐Ion Batteries: Current State and Future Directions for Sustainable Energy Storage

Singh

Islam

Meena

et al. 2023

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

Rechargeable sodium‐ion batteries (SIBs) are emerging as a viable alternative to lithium‐ion battery (LIB) technology, as their raw materials are economical, geographically abundant (unlike lithium), and less toxic. The matured LIB technology contributes significantly to digital civilization, from mobile electronic devices to zero electric‐vehicle emissions. However, with the increasing reliance on renewable energy sources and the anticipated integration of high‐energy‐density batteries into the grid, concerns have arisen regarding the sustainability of lithium due to its limited availability and consequent price escalations. In this context, SIBs have gained attention as a potential energy storage alternative, benefiting from the abundance of sodium and sharing electrochemical characteristics similar to LIBs. Furthermore, high‐entropy chemistry has emerged as a new paradigm, promising to enhance energy density and accelerate advancements in battery technology to meet the growing energy demands. This review uncovers the fundamentals, current progress, and the views on the future of SIB technologies, with a discussion focused on the design of novel materials. The crucial factors, such as morphology, crystal defects, and doping, that can tune electrochemistry, which should inspire young researchers in battery technology to identify and work on challenging research problems, are also reviewed.

show abstract

Stabilizing the Deep Sodiation Process in Layered Sodium Manganese Cathodes by Anchoring Boron Ions

Yang,

Li,

Liu

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

Advanced high‐energy‐density sodium‐ion batteries (SIBs) are inseparable from cathode materials with high specific capacities. Layered manganese‐rich oxides (NaxMnO2, 0.6 ≤ x ≤1) are promising cathode materials owing to their ease of intercalation and extraction of a considerable amount of sodium ions. However, lattice interactions, especially electrostatic repulsive forces and anisotropic stresses, are usually caused by deep desodiatin/sodiation process, resulting in intragranular cracks and capacity degradation in SIBs. Here, we introduced boron ions into the layered structure to build up B–O–Mn bonds. The regulated electronic structure in Na0.637B0.038MnO2 (B‐NMO) materials inhibited the deformation of MnO6 octahedra, which finally achieved a gentle structural transition during the deep sodiation process. B‐NMO electrode exhibits a high capacity (141 mAh g–1) at 1C with a capacity retention of 81% after 100 cycles. Therefore, anchoring boron to manganese‐rich materials inhibits the detrimental structural evolution of deep sodiation and can be used to obtain excellent cathode materials for SIBs.This article is protected by copyright. All rights reserved

show abstract

Unraveling vacancy-induced oxygen redox reaction and structural stability in Na-based layered oxides

Cited by 15 publications

References 38 publications

Transition Metal Vacancy in Layered Cathode Materials for Sodium‐Ion Batteries

Transition Metal Vacancy in Layered Cathode Materials for Sodium‐Ion Batteries

Unleashing the Potential of Sodium‐Ion Batteries: Current State and Future Directions for Sustainable Energy Storage

Stabilizing the Deep Sodiation Process in Layered Sodium Manganese Cathodes by Anchoring Boron Ions

Contact Info

Product

Resources

About