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doi:10.1002/anie.v52.7

Cited by 6 publications

(5 citation statements)

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Section: Miscellaneous Na Insertion Materialsmentioning

confidence: 99%

“…Relatively large activation energy for Na migration is expected in the charge/discharge process for Na x FeF 3 . Therefore, the use of cyanide ions rather than fluoride ions has been proposed to reduce the activation energy with respect to the Na migration process [149]. Moreover, the cyanide ions as strong-field ligands drastically influence crystal field splitting for the 3 d orbital of iron ions.…”

Section: Miscellaneous Na Insertion Materialsmentioning

confidence: 99%

“…Polarization of Prussian blue analogues in Na cells is much smaller than that of the perovskite system with fluoride ions. Goodenough’s research group has reported the Na-enriched iron manganese system, Na 1.72 MnFe(CN) 6 (an ideal crystal structure without sodium vacancies is illustrated in figure 21(b)), as a potential positive electrode material for NIBs [149]. Magnetic measurements of Na 1.72 MnFe(CN) 6 suggest the presence of low-spin Fe(II) coordinated by carbon, and the low-spin Fe(II)/Fe(III) is redox active in Na cells [149].…”

Section: Miscellaneous Na Insertion Materialsmentioning

confidence: 99%

“…Goodenough’s research group has reported the Na-enriched iron manganese system, Na 1.72 MnFe(CN) 6 (an ideal crystal structure without sodium vacancies is illustrated in figure 21(b)), as a potential positive electrode material for NIBs [149]. Magnetic measurements of Na 1.72 MnFe(CN) 6 suggest the presence of low-spin Fe(II) coordinated by carbon, and the low-spin Fe(II)/Fe(III) is redox active in Na cells [149]. The reversible capacity reaches 130 mAh g −1 , with an average operating voltage of 3.2 V. The sample also shows excellent rate capability in the Na cell, as shown in figure 22(b).…”

Section: Miscellaneous Na Insertion Materialsmentioning

confidence: 99%

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Recent research progress on iron- and manganese-based positive electrode materials for rechargeable sodium batteries

Yabuuchi

Komaba

2014

Science and Technology of Advanced Materials

205

143

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Large-scale high-energy batteries with electrode materials made from the Earth-abundant elements are needed to achieve sustainable energy development. On the basis of material abundance, rechargeable sodium batteries with iron- and manganese-based positive electrode materials are the ideal candidates for large-scale batteries. In this review, iron- and manganese-based electrode materials, oxides, phosphates, fluorides, etc, as positive electrodes for rechargeable sodium batteries are reviewed. Iron and manganese compounds with sodium ions provide high structural flexibility. Two layered polymorphs, O3- and P2-type layered structures, show different electrode performance in Na cells related to the different phase transition and sodium migration processes on sodium extraction/insertion. Similar to layered oxides, iron/manganese phosphates and pyrophosphates also provide the different framework structures, which are used as sodium insertion host materials. Electrode performance and reaction mechanisms of the iron- and manganese-based electrode materials in Na cells are described and the similarities and differences with lithium counterparts are also discussed. Together with these results, the possibility of the high-energy battery system with electrode materials made from only Earth-abundant elements is reviewed.

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Section: Miscellaneous Na Insertion Materialsmentioning

confidence: 99%

Section: Miscellaneous Na Insertion Materialsmentioning

confidence: 99%

Section: Miscellaneous Na Insertion Materialsmentioning

confidence: 99%

Section: Miscellaneous Na Insertion Materialsmentioning

confidence: 99%

See 2 more Smart Citations

Recent research progress on iron- and manganese-based positive electrode materials for rechargeable sodium batteries

Yabuuchi

Komaba

2014

Science and Technology of Advanced Materials

205

143

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“…Na-ion batteries (NIBs), due to the high abundance and uniform distribution of Na sources, are considered as an appealing alternative to Li-ion batteries (LIBs), especially on applications of large-scale energy storage. [1][2][3] The cathode materials with various structures, including layered transition metal oxides, [4][5][6][7][8][9] Na super ionic conductors (NASICON), [10,11] prussian blue analogues, [12][13][14][15] and organic compounds, [16] etc., have been synthesized and investigated. Among these materials, layered transitionmetal oxides (Na x TMO 2 , TM = transition metal) are one of the most promising candidates for commercial application due to their feasible preparation process and high theoretical capacity.…”

Section: Introductionmentioning

confidence: 99%

Designing a P2-type cathode material with Li in both Na and transition metal layers for Na-ion batteries

Gao¹,

Sun²,

Guo³

et al. 2022

Chinese Phys. B

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P2-type layered oxides have been considered as promising cathode materials for Na-ion batteries, but the capacity decay resulting from the Na+/vacancy ordering and phase transformation limits their future large-scale applications. Herein, the impact of Li-doping in different layers on the structure and electrochemical performance of P2-type Na0.7Ni0.35Mn0.65O2 is investigated. It can be found that Li ions successfully enter both the Na and transition metal layers. The strategy of Li-doping can improve the cycling stability and rate capability of P2-type layered oxides, which promotes the development of high-performance Na-ion batteries.

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One-step fabrication of superhydrophobic and superoleophilic cigarette filters for oil-water separation

Liu

Chen

Yang

et al. 2015

Journal of Adhesion Science and Technology

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To develop a simple and efficient way to recycle used cigarette filters, we report on a one-step method for preparing superhydrophobic and superoleophilic cigarette filters for oil-water separation. The robust coating layer on the surface of the cellulose acetate fiber, along with the inherent rough texture of the cigarette filter, could lead to its surface that displayed superhydrophobicity and superoleophilicity. Water droplets can retain in spherical shapes on the modified cigarette filters, while oils were immediately absorbed by the cigarette filters with high absorption capacity. As a result, free oil-water mixtures were separated with efficiency of above 98.0% by the driving force of gravity, and water-in-oil emulsion was also separated with a promising flux of about 2500 L m −2 h −1 . The purity of oil for the tested emulsion was above 99.96%, indicating extremely high separation efficiency. This method for the fabrication of the superhydrophobic and superoleophilic cigarette filters would be a good candidate for recycling the solid wastes and developing an economic oil-water separation material to meet emerging needs in practical applications.

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Cited by 6 publications

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Recent research progress on iron- and manganese-based positive electrode materials for rechargeable sodium batteries

Recent research progress on iron- and manganese-based positive electrode materials for rechargeable sodium batteries

Designing a P2-type cathode material with Li in both Na and transition metal layers for Na-ion batteries

One-step fabrication of superhydrophobic and superoleophilic cigarette filters for oil-water separation

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