Electrochemical and thermal properties of P2-type Na2/3Fe1/3Mn2/3O2 for Na-ion batteries

Zhao, Jianhui; Xu, Jun; Lee, Dae Hoe; Dimov, Nikolay; Meng, Ying Shirley; Okada, Shigeto

doi:10.1016/j.jpowsour.2014.04.048

Cited by 104 publications

(97 citation statements)

References 26 publications

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“…In the case of transition metal ordering, we found that as expected it is mainly controlled by the difference in the ionic radii of M1 and M2, as illustrated by a large number of P2-layered oxides689121314151617181920212223242526272829303132333435. Large difference in ionic radii is favourable for forming ordered arrangement while small difference tends to form disordered arrangement.…”

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confidence: 69%

P2-Na0.6[Cr0.6Ti0.4]O2 cation-disordered electrode for high-rate symmetric rechargeable sodium-ion batteries

et al. 2015

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Most P2-type layered oxides exhibit Na+/vacancy-ordered superstructures because of strong Na+–Na+ interaction in the alkali metal layer and charge ordering in the transition metal layer. These superstructures evidenced by voltage plateaus in the electrochemical curves limit the Na+ ion transport kinetics and cycle performance in rechargeable batteries. Here we show that such Na+/vacancy ordering can be avoided by choosing the transition metal ions with similar ionic radii and different redox potentials, for example, Cr3+ and Ti4+. The designed P2-Na0.6[Cr0.6Ti0.4]O2 is completely Na+/vacancy-disordered at any sodium content and displays excellent rate capability and long cycle life. A symmetric sodium-ion battery using the same P2-Na0.6[Cr0.6Ti0.4]O2 electrode delivers 75% of the initial capacity at 12C rate. Our contribution demonstrates that the approach of preventing Na+/vacancy ordering by breaking charge ordering in the transition metal layer opens a simple way to design disordered electrode materials with high power density and long cycle life.

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confidence: 69%

P2-Na0.6[Cr0.6Ti0.4]O2 cation-disordered electrode for high-rate symmetric rechargeable sodium-ion batteries

et al. 2015

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“…Thus, Na-Fe-Mn-containing structures could be ideal as low-cost Na + electrodes. Among Na-ion host candidates based on Fe and Mn, various Na-deficient P2-type layered Na 2/3 (Fe y Mn 1-y )O 2 compositions have been investigated as promising high capacity cathode materials, showing energy density only slightly inferior to similar lithium metal oxides [4,5,6].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Al-doping effects on the NaFe0.5Mn0.5O2 cathode for Na-ion batteries

Kee

Dimov

Champet

et al. 2016

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P2-Na 2/3 MO 2 materials have recently been investigated as promising high-capacity cathode hosts for Na-ion batteries. On the other hand, the Na-deficiency in these materials precludes a high energy density when coupled with Na-free anodes. As an alternative, O3-NaFeO 2 and its various derivatives such as NaFe 0.5 Mn 0.5 O 2 have been suggested and investigated. In this study, we dope Al in NaFe 0.5 Mn 0.5 O 2 and investigate Al-doping effects on the electrochemical properties of the Na + host. The Al-doped compound shows almost the same conductivity and diffusivity as the pristine structure. However, Al-doping enhances O3-P3 phase transition.

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“…Among most of the Na cathodes reported to date, O3 structured Na oxides (Na x MO 2, M = Transition Metal) have attracted considerable interest, because their structures are able to accommodate large Na ions and provide spacious diffusion path. [1][2][3][4][5][6][7][8][9] Although significant improvement has been achieved, the O3 structure materials still suffer from multiple phase transformations from O3 to O'3, P3, P'3 and then P''3 consecutively, that severely deteriorates the structural integrity and performance reversibility. [10] To overcome these issues, novel cathode materials are needed.…”

Section: Introductionmentioning

confidence: 99%

Exploring Li substituted O3-structured layered oxides NaLixNi1/3−xMn1/3+xCo1/3−xO2 (x = 0.07, 0.13, and 0.2) as promising cathode materials for rechargeable Na batteries

Liu

Meng

2015

Electrochemistry Communications

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Electrochemical and thermal properties of P2-type Na2/3Fe1/3Mn2/3O2 for Na-ion batteries

Cited by 104 publications

References 26 publications

P2-Na0.6[Cr0.6Ti0.4]O2 cation-disordered electrode for high-rate symmetric rechargeable sodium-ion batteries

P2-Na0.6[Cr0.6Ti0.4]O2 cation-disordered electrode for high-rate symmetric rechargeable sodium-ion batteries

Investigation of Al-doping effects on the NaFe0.5Mn0.5O2 cathode for Na-ion batteries

Exploring Li substituted O3-structured layered oxides NaLixNi1/3−xMn1/3+xCo1/3−xO2 (x = 0.07, 0.13, and 0.2) as promising cathode materials for rechargeable Na batteries

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