Dual‐Role Surface Modification of Layered Oxide Cathodes for High‐Power Sodium‐Ion Batteries

Yang, Ying; Feng, Yuzhang; Ma, Cheng; Huang, Qun; Zhou, Liangjun; Wang, Peng; Wei, Weifeng

doi:10.1002/celc.202000002

Cited by 17 publications

(15 citation statements)

References 44 publications

(31 reference statements)

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“…This well‐tailored epitaxial layer could effectively suppress P2–OP4 phase evolution upon high voltages, preventing the accumulation of uniform internal strain and the nucleation of intragranular cracks. The same group also proposed a facile dual‐role chemical treatment strategy on Mn 4/6 Co 1/6 Ni 1/6 O 2 precursor by using a strong oxidant (KMnO 4 solution) 153 . The K + ions acting as a pillar are distributed uniformly in the final product and doped into the P2‐type layered structure after the sintering process, which enlarges the space of 2D channels for fast Na + diffusion.…”

Section: Interface Chemistrymentioning

confidence: 99%

Layered oxide cathodes for sodium‐ion batteries: From air stability, interface chemistry to phase transition

Liu

Han

Peng

et al. 2023

InfoMat

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Sodium-ion batteries (SIBs) are considered as a low-cost complementary or alternative system to prestigious lithium-ion batteries (LIBs) because of their similar working principle to LIBs, cost-effectiveness, and sustainable availability of sodium resources, especially in large-scale energy storage systems (EESs).Among various cathode candidates for SIBs, Na-based layered transition metal oxides have received extensive attention for their relatively large specific capacity, high operating potential, facile synthesis, and environmental benignity.However, there are a series of fatal issues in terms of poor air stability, unstable cathode/electrolyte interphase, and irreversible phase transition that lead to unsatisfactory battery performance from the perspective of preparation to application, outside to inside of layered oxide cathodes, which severely limit their practical application. This work is meant to review these critical problems associated with layered oxide cathodes to understand their fundamental roots and degradation mechanisms, and to provide a comprehensive summary of mainstream modification strategies including chemical substitution, surface modification, structure modulation, and so forth, concentrating on how to improve air stability, reduce interfacial side reaction, and suppress phase transition for realizing high structural reversibility, fast Na + kinetics, and superior comprehensive electrochemical performance. The advantages and

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Section: Interface Chemistrymentioning

confidence: 99%

Layered oxide cathodes for sodium‐ion batteries: From air stability, interface chemistry to phase transition

Liu

Han

Peng

et al. 2023

InfoMat

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“…(c 1 ) HAADF‐STEM image of the 0.1 K‐NaMCN; (c 2 ) The line profile taken form c 1 with measured interlayer spacing crossing the line; (c 3 ) Rate performance of NaMCN and x K‐NaMCN ( x = 0.05, 0.1, 0.2) materials. [ 103 ] Copyright 2020, WILEY‐VCH. C‐PDA, carbonized polydopamine.…”

Section: Stable Electrolyte/cathode Interfacementioning

confidence: 99%

“…The coherent spinel‐like surface structure induced by KMnO 4 solution enhances Na transport because of the enlarged interlayer spacing in the lattice (Figure 11c 1,2 ). [ 103 ] Yan et al reported a fiction Zn doping Na 0.78 Cu 0.27 Zn 0.06 Mn 0.67 O 2 with P2@P3 bi‐phase structure. [ 68 ] Such a structure could provide more open space and a short pathway for Na + transport, accelerating Na + diffusion.…”

Section: Stable Electrolyte/cathode Interfacementioning

confidence: 99%

Surface chemistry engineering of layered oxide cathodes for sodium‐ion batteries

Wang

et al. 2022

Carbon Neutralization

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Sodium‐ion batteries (SIBs) have attracted extensive attention to be applied in large‐scale energy storage due to their low cost and abundant storage resources. Among cathode materials for SIBs, layered oxide cathodes are considered one of the most promising candidates for practical application owing to their high theoretical capacities, simple synthesis routes, and environmental friendliness. However, poor air stability, complicated interfacial reaction, and irreversible phase translation of layered oxide cathodes pose problems for the long‐term cycle as well as rate performance. In this review, the recent achievements and progress in surface engineering chemistry strategies to improve the electrochemical performance of SIBs have been summarized including mechanical mixing, in‐situ coating methods, and designing unique interfacial structures. Moreover, inspired by previous studies, we propose an innovative concept of interface conversion reaction with bulk penetration doping integration, which is expected to deal with both interfacial and intrinsic issues synchronously through heat treatment. It could not only eliminate residual sodium compounds on the surface and improve air stability but also suppress the dissolution and the migration of transition metal and the phase transformation. The insights that came up in this review can be considered as a guide for surface engineering on layered oxide cathode for SIBs.

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“…Besides single metal oxides, a spinel-like coating nanolayer, [139,140] tunnel structure coating, [141] and functionalized core-shell structures [142,143] have also been used to improve the cycling stability of layered oxide cathodes. A well-designed epitaxial spinel-like nanolayer effectively inhibited the unfavorable P2-OP4 phase transition associated with dramatic volume change at high voltage.…”

Section: Oxide Coating Layermentioning

confidence: 99%

Structural degradation mechanisms and modulation technologies of layered oxide cathodes for sodium‐ion batteries

Song

Wang

Lee

2022

Carbon Neutralization

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Renewable energies, such as solar and wind, have been explored and widely applied for alleviating problems associated with the depletion of fossil fuel resources and environmental pollution. The intermittent and fluctuating features of these renewable energies require development of efficient energy storage and conversion systems. Sodium‐ion batteries (SIBs) are considered one of the most promising candidates for large‐scale energy storage due to the low cost and earth abundance of sodium resources. A major challenge for the practical application of SIBs is the development of appropriate cathodes with high energy densities and cycling stabilities. Layered oxide cathodes have received significant attention because of their relatively simple synthetic routes and high capacities stemming from their layered structures. However, they often suffer from moisture sensitivity and structural degradation upon repeated Na+ insertion/extraction, leading to severe performance fading. This review summarizes and discusses the degradation mechanisms of these layered oxide cathodes and modulation strategies for addressing the stability issues. Understanding the mechanisms behind structural instability would provide better insight for improving SIBs' cathode materials, which has critical implications for the designs and applications of SIBs as renewable energy systems.

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Dual‐Role Surface Modification of Layered Oxide Cathodes for High‐Power Sodium‐Ion Batteries

Cited by 17 publications

References 44 publications

Layered oxide cathodes for sodium‐ion batteries: From air stability, interface chemistry to phase transition

Layered oxide cathodes for sodium‐ion batteries: From air stability, interface chemistry to phase transition

Surface chemistry engineering of layered oxide cathodes for sodium‐ion batteries

Structural degradation mechanisms and modulation technologies of layered oxide cathodes for sodium‐ion batteries

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