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Exploiting Na2MnPO4F as a high-capacity and well-reversible cathode material for Na-ion batteries

Lin, Xiaochen ; Hou, Xu LU orcid ; Wu, Xiaobiao ; Wang, Sihui ; Gao, Ming and Yang, Yong (2014) In RSC Advances 4(77). p.40985-40993
Abstract

A Na2MnPO4F/C nanocomposite material is successfully synthesized via spray drying, followed by a high-temperature sintering method. It is shown that the highly phase-pure Na2MnPO4F with symmetry of the P21/n space group is uniformly embedded in the carbon networks, which play a key role in building up a highly efficient, electron-flow channel and elevating the electronic conductivity of the nanocomposites. The electrochemical measurements show that the initial discharge capacity of Na2MnPO4F reaches up to 140 and 178 mA h g-1at 30 °C and 55 °C, respectively. Furthermore, the capacity still maintains 135 mA h g-1after 20 cycles at 55 °C.... (More)

A Na2MnPO4F/C nanocomposite material is successfully synthesized via spray drying, followed by a high-temperature sintering method. It is shown that the highly phase-pure Na2MnPO4F with symmetry of the P21/n space group is uniformly embedded in the carbon networks, which play a key role in building up a highly efficient, electron-flow channel and elevating the electronic conductivity of the nanocomposites. The electrochemical measurements show that the initial discharge capacity of Na2MnPO4F reaches up to 140 and 178 mA h g-1at 30 °C and 55 °C, respectively. Furthermore, the capacity still maintains 135 mA h g-1after 20 cycles at 55 °C. The Na+diffusion coefficient in Na2MnPO4F is calculated at about 10-17cm2s-1by the GITT method. The impressive cycling performance of the material is ascribed to the good structural reversibility and stability of Na2MnPO4F, which are confirmed by the ex situ XRD measurements during the first cycle and after 30 cycles.

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author
; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
in
RSC Advances
volume
4
issue
77
pages
9 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:84907151142
ISSN
2046-2069
DOI
10.1039/c4ra05336b
language
English
LU publication?
no
additional info
Publisher Copyright: © the Partner Organisations 2014.
id
f862b7a1-ff66-468d-89f3-0d2a1469d94e
date added to LUP
2025-12-05 22:43:14
date last changed
2025-12-12 12:57:20
@article{f862b7a1-ff66-468d-89f3-0d2a1469d94e,
  abstract     = {{<p>A Na<sub>2</sub>MnPO<sub>4</sub>F/C nanocomposite material is successfully synthesized via spray drying, followed by a high-temperature sintering method. It is shown that the highly phase-pure Na<sub>2</sub>MnPO<sub>4</sub>F with symmetry of the P2<sub>1</sub>/n space group is uniformly embedded in the carbon networks, which play a key role in building up a highly efficient, electron-flow channel and elevating the electronic conductivity of the nanocomposites. The electrochemical measurements show that the initial discharge capacity of Na<sub>2</sub>MnPO<sub>4</sub>F reaches up to 140 and 178 mA h g<sup>-1</sup>at 30 °C and 55 °C, respectively. Furthermore, the capacity still maintains 135 mA h g<sup>-1</sup>after 20 cycles at 55 °C. The Na<sup>+</sup>diffusion coefficient in Na<sub>2</sub>MnPO<sub>4</sub>F is calculated at about 10<sup>-17</sup>cm<sup>2</sup>s<sup>-1</sup>by the GITT method. The impressive cycling performance of the material is ascribed to the good structural reversibility and stability of Na<sub>2</sub>MnPO<sub>4</sub>F, which are confirmed by the ex situ XRD measurements during the first cycle and after 30 cycles.</p>}},
  author       = {{Lin, Xiaochen and Hou, Xu and Wu, Xiaobiao and Wang, Sihui and Gao, Ming and Yang, Yong}},
  issn         = {{2046-2069}},
  language     = {{eng}},
  number       = {{77}},
  pages        = {{40985--40993}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{RSC Advances}},
  title        = {{Exploiting Na<sub>2</sub>MnPO<sub>4</sub>F as a high-capacity and well-reversible cathode material for Na-ion batteries}},
  url          = {{http://dx.doi.org/10.1039/c4ra05336b}},
  doi          = {{10.1039/c4ra05336b}},
  volume       = {{4}},
  year         = {{2014}},
}