Al and Fe-containing Mn-based layered cathode with controlled vacancies for high-rate sodium ion batteries

Liu, Xiangsi; Zhong, Guiming; Xiao, Zhumei; Zheng, Bizhu; Zuo, Wenhua; Zhou, Ke; Liu, Haodong; Liang, Ziteng; Xiang, Yuxuan; Chen, Zirong; Ortiz, Gregório F.; Fu, Riqiang; Yang, Yong

doi:10.1016/j.nanoen.2020.104997

Cited by 66 publications

(65 citation statements)

References 48 publications

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“…An increased Na−O−M distance significantly reduces the amount of unpaired electron density delocalized from the metal to the sodium site. In another report, Al‐ and Fe‐containing Na x MnO 2 (Na 0.67 Al 0.1 Fe 0.05 Mn 0.85 O 2 ), with a high initial capacity of 202 mAh g −1 within 2–4 V, was investigated using XRD and Na NMR [10] . Rapid quenching of the material induces the formation of vacancies in transition metal layers and enhances the Mn 4+ /Mn 3+ redox centers.…”

Section: Cathode (Positive Electrode) Materialsmentioning

confidence: 99%

²³Na Solid‐State NMR Analyses for Na‐Ion Batteries and Materials

Gotoh

2021

Batteries & Supercaps

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Sodium‐ion batteries (NIBs) have received considerable attention as next‐generation batteries that complement or replace the current demand for lithium‐ion batteries. For the development of NIBs, elucidating the states of sodium ions and understanding the charging‐discharging mechanism on the electrodes is indispensable for achieving high capacity, high efficiency, long life, and reasonably safe performance. Solid‐state nuclear magnetic resonance (SS‐NMR) is a powerful tool for obtaining direct information on nuclei as it can detect information on sodium and distinguish different electronic circumstances. In this minireview, recent progress on NMR analyses of NIB electrode materials (cathode and anode) is outlined. 23Na NMR signals of NaMnO2‐type cathodes, which are usually affected by the strong effect of paramagnetic species and other cathode materials, are introduced. Additionally, NMR analyses of hard carbon, graphite, and other inorganic anode materials are summarized.

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Section: Cathode (Positive Electrode) Materialsmentioning

confidence: 99%

²³Na Solid‐State NMR Analyses for Na‐Ion Batteries and Materials

Gotoh

2021

Batteries & Supercaps

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“…Another effective strategy is to regulate the pristine structure of layered oxides. For example, Tm vacancies, whose concentration can be regulated by adopting different cooling processes, have been reported to influence the reversible capacity and structural changes of Na x TmO 2 greatly 13 , 24 , 25 . However, the application of the Mn-based Na x TmO 2 is still thwarted by unsatisfied electrochemical performances.…”

Section: Introductionmentioning

confidence: 99%

Engineering Na+-layer spacings to stabilize Mn-based layered cathodes for sodium-ion batteries

et al. 2021

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Layered transition metal oxides are the most important cathode materials for Li/Na/K ion batteries. Suppressing undesirable phase transformations during charge-discharge processes is a critical and fundamental challenge towards the rational design of high-performance layered oxide cathodes. Here we report a shale-like NaxMnO2 (S-NMO) electrode that is derived from a simple but effective water-mediated strategy. This strategy expands the Na+ layer spacings of P2-type Na0.67MnO2 and transforms the particles into accordion-like morphology. Therefore, the S-NMO electrode exhibits improved Na+ mobility and near-zero-strain property during charge-discharge processes, which leads to outstanding rate capability (100 mAh g−1 at the operation time of 6 min) and cycling stability (>3000 cycles). In addition, the water-mediated strategy is feasible to other layered sodium oxides and the obtained S-NMO electrode has an excellent tolerance to humidity. This work demonstrates that engineering the spacings of alkali-metal layer is an effective strategy to stabilize the structure of layered transition metal oxides.

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“…Recently, Yang and co‐workers reported a Mn‐based layered cathode with controlled vacancies for sodium ion batteries through a combination of liquid N 2 quenching and aliovalent doping. Through in‐situ synchrotron X‐ray diffraction, time‐of‐flight powder neutron diffraction and solid‐state 23 Na nuclear magnetic resonance technologies, it is proved that the proposed synthesis method can effectively adjust the transition metal‐ion vacancy and improve the Mn 4+ /Mn 3+ redox center of P2‐type Mn‐based materials [32] . This results showed that the optimized structure significantly improved the deliverable capacity, metal ions mobility and electronic conductivity of materials.…”

Section: Defect Chemistrymentioning

confidence: 87%

Defect Chemistry on Electrode Materials for Electrochemical Energy Storage and Conversion

Zhang

Long

et al. 2020

ChemNanoMat

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Efficient and sustainable clean energy technology is an urgent need to solve energy crisis and alleviate environmental pollution. Reasonable design of electrode materials can effectively improve the performance of electrochemical energy storage and conversion devices. As an effective method to control the properties of electrode materials, defects have recently received extensive attention. Herein, in this review, we will systematically summarize the application of defect chemistry on electrode materials for electrochemical energy storage and conversion. Firstly, we mainly describe the research content of defect chemistry from three aspects, including defect construction, the dynamic evolution and regulation of defects. Based on those understanding, the applications of defect chemistry in fuel cells, metal‐ion batteries and carbon/nitrogen fixation are discussed, respectively. Finally, the existing challenges and future development prospects of defect chemistry are proposed. Overall, we hope this review could help readers to better understand and apply defect chemistry on electrode materials.

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Al and Fe-containing Mn-based layered cathode with controlled vacancies for high-rate sodium ion batteries

Cited by 66 publications

References 48 publications

²³Na Solid‐State NMR Analyses for Na‐Ion Batteries and Materials

²³Na Solid‐State NMR Analyses for Na‐Ion Batteries and Materials

Engineering Na+-layer spacings to stabilize Mn-based layered cathodes for sodium-ion batteries

Defect Chemistry on Electrode Materials for Electrochemical Energy Storage and Conversion

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Al and Fe-containing Mn-based layered cathode with controlled vacancies for high-rate sodium ion batteries

Cited by 66 publications

References 48 publications

23Na Solid‐State NMR Analyses for Na‐Ion Batteries and Materials

23Na Solid‐State NMR Analyses for Na‐Ion Batteries and Materials

Engineering Na+-layer spacings to stabilize Mn-based layered cathodes for sodium-ion batteries

Defect Chemistry on Electrode Materials for Electrochemical Energy Storage and Conversion

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Product

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²³Na Solid‐State NMR Analyses for Na‐Ion Batteries and Materials

²³Na Solid‐State NMR Analyses for Na‐Ion Batteries and Materials