Impurity-vibrational entropy enables quasi-zero-strain layered oxide cathodes for high-voltage sodium-ion batteries

Ren, Haixia; Zheng, Lumin; Liu, Yu; Ni, Qiao; Qian, Jiasheng; Liu, Ying; Li, Qiaojun; Liu, Mingquan; Bai, Ying; Weng, Suting; Wang, Xuefeng; Wu, Feng; Wu, Chuan

doi:10.1016/j.nanoen.2022.107765

Cited by 42 publications

(35 citation statements)

References 47 publications

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“…The amount of Na 2 CO 3 interphase material (534.5 eV) increased at each discharged state, and decreased at each charge state. Also, the cell components (COH from the polyvinylidene fluoride (PVDF) binder) (at 533.1 eV) and oxygenated species (CO, CO 2 ) at 537.5 eV in Figure 3d [29,34,37,38] exhibited the opposite trend to that of the interphase material, revealing that the interphase species were formed and dissolved according to the discharged and charged states, respectively. Additional discussion is provided with the scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS) element mapping results (Figure S8, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Enhanced Cycle Stability of Low‐Cost Na‐Rich Metallic NaCl Electrode for Advanced Na‐Ion Batteries

Moeez

Susanto

Park

et al. 2022

Adv Funct Materials

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Sodium-rich metallic Na x+z has received significant attention as a low-cost alternative to the conventional electrode materials used in Li-ion batteries. However, the poor cyclability of Na x Cl remains a major challenge to its practical application. Here, a simple method is developed for improving the electrochemical performance of Na x Cl by controlling the upper limit of cut-off voltage. It is demonstrated that additional Na-vacancy defects can be introduced in the NaCl structure during the high-voltage activation process at 4.5 V. The structure then accommodates more sodium ions during the next discharge, resulting in increased capacity. At the same time, Cl-ions released by NaCl decomposition are oxidized to form Cl-based organic species at the active material interfaces. This plays a crucial role in protecting the NaCl electrode from undesired side reactions at high voltage. In short, this control of the charging protocol helps to induce more vacancies in the NaCl structure, as well as form stable interphases on the electrode surface, contributing to the increased capacity and enhanced cycle stability. This study will help in exploring a new approach for developing low-cost and high-capacity electrode material, which can potentially be applied in future energy-storage systems.

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Section: Resultsmentioning

confidence: 99%

Enhanced Cycle Stability of Low‐Cost Na‐Rich Metallic NaCl Electrode for Advanced Na‐Ion Batteries

Moeez

Susanto

Park

et al. 2022

Adv Funct Materials

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“…As a result, the cycling and rate performance are enhanced. Analogically, Ren et al [156] recently reported a Zr 4+ doping integrated with ZrO 2 surface coating modification on Na 2/3 Ni 1/3 Mn 2/3 O 2 (denoted as P2-NaNM@Zr) by a simple one-step liquid phase reaction, which realized quasi-zero-strain feature thorough increasing the impurity-vibrational entropy. In situ and ex situ XRD shows that only an extremely low volume change of 1.18% occurs even under the high upper cut-off voltage of 4.5 V. The doped Zr 4+ can improve the reversibility of anionic oxygen redox and disturb Na + /vacancy ordering, thus improving the structural stability and facilitating Na + diffusion, which is proved by DFT calculation.…”

Section: Ion Doping Integrated Coatingmentioning

confidence: 91%

Recent Progress in the Emerging Modification Strategies for Layered Oxide Cathodes toward Practicable Sodium Ion Batteries

Peng

Wan

Ahmad

et al. 2023

Advanced Energy Materials

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Low‐cost sodium‐ion batteries (SIBs) have been extensively considered as a supplement or even a replacement for successful lithium‐ion batteries. However, the practical application of SIBs is limited by their energy density and cyclic performance, which are mainly constrained by the cathode side. Therefore, the development of advanced cathode materials is essential for the practical application of SIBs. Among the various cathode materials, layered transition metal oxides (LTMOs) are highly promising candidates due to their compact crystal structure, low‐cost, ease of preparation, and similarities to successful Li‐based LTMOs. Unfortunately, the bottleneck issues faced by Na‐based LTMOs, such as severe phase transitions, sluggish diffusion kinetics, and interface deterioration, pose significant challenges in achieving high‐performance cathodes. In this review, a comprehensive overview and summary of recently reported modification strategies for layered oxides are provided and the structure–function–performance relationship is refined. A perspective on the outlook and development direction for Na‐based LTMOs cathodes is also provided. This review comprehensively explores the modification strategies of Na‐based LTMOs, providing a new horizon for future research on Na‐based LTMOs.

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“…[4][5][6] The Na storage cathode is one of the key factors that affects the performance of SIBs. A large number of cathode materials have been reported for SIBs, such as transition-metal oxides, [7][8][9][10] Prussian blue analogs [11][12][13][14] and polyanionic compounds. [15][16][17][18][19][20] Thereinto, polyanionic compounds have attracted much attention due to their framework structure, structural stability and high workingpotential with the potential for high energy density, such as Na 3 MnPO 4 CO 3 , Na 2 MnP 2 O 7 and Na 4 Mn 3 (PO 4 ) 2 P 2 O 7 .…”

Section: Introductionmentioning

confidence: 99%

Single-crystalline Mg-substituted Na₄Mn₃(PO₄)₂P₂O₇ nanoparticles as a high capacity and superior cycling cathode for sodium-ion batteries

et al. 2023

Nanoscale

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Impurity-vibrational entropy enables quasi-zero-strain layered oxide cathodes for high-voltage sodium-ion batteries

Cited by 42 publications

References 47 publications

Enhanced Cycle Stability of Low‐Cost Na‐Rich Metallic NaCl Electrode for Advanced Na‐Ion Batteries

Enhanced Cycle Stability of Low‐Cost Na‐Rich Metallic NaCl Electrode for Advanced Na‐Ion Batteries

Recent Progress in the Emerging Modification Strategies for Layered Oxide Cathodes toward Practicable Sodium Ion Batteries

Single-crystalline Mg-substituted Na₄Mn₃(PO₄)₂P₂O₇ nanoparticles as a high capacity and superior cycling cathode for sodium-ion batteries

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Impurity-vibrational entropy enables quasi-zero-strain layered oxide cathodes for high-voltage sodium-ion batteries

Cited by 42 publications

References 47 publications

Enhanced Cycle Stability of Low‐Cost Na‐Rich Metallic NaCl Electrode for Advanced Na‐Ion Batteries

Enhanced Cycle Stability of Low‐Cost Na‐Rich Metallic NaCl Electrode for Advanced Na‐Ion Batteries

Recent Progress in the Emerging Modification Strategies for Layered Oxide Cathodes toward Practicable Sodium Ion Batteries

Single-crystalline Mg-substituted Na4Mn3(PO4)2P2O7 nanoparticles as a high capacity and superior cycling cathode for sodium-ion batteries

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Single-crystalline Mg-substituted Na₄Mn₃(PO₄)₂P₂O₇ nanoparticles as a high capacity and superior cycling cathode for sodium-ion batteries