Abstract
A new cathode material for sodium-ion batteries, the sodium vanadium bronze γ-Na0.96V2O5, is easily synthesized by chemical sodiation of the γ′-V2O5 polymorph at room temperature. This low-cost soft chemistry route leads to fine particles with high purity and high crystallinity. The crystal features and morphology of the γ-Na0.96V2O5 material have been characterized by X-ray diffraction, Raman spectroscopy, and scanning electron microscopy. It exhibits a layered structure with orthorhombic symmetry (Pnma space group) isomorphic to that of the lithiated γ-LiV2O5 bronze. This cathode material is evaluated by charge-discharge experiments. Promising electrochemical performance is outlined. A quantitative Na extraction process is observed at a high voltage of 3.4 V versus Na+/Na, and a reversible electrochemical behavior is demonstrated with an initial specific capacity of 125 mAh g-1, which remains at 112 mAh g-1 after 50 cycles at C/5. The structural reversibility of the sodium extraction-insertion reaction in γ-Na0.96V2O5 is demonstrated upon cycling. This new vanadium bronze competes with the well-known cathode materials for sodium-ion batteries such as NaNi1/3Mn1/3Co1/3O2 and NaFePO4.
| Original language | English |
|---|---|
| Pages (from-to) | 5305-5314 |
| Number of pages | 10 |
| Journal | Chemistry of Materials |
| Volume | 30 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - Aug 14 2018 |
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ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
- Materials Chemistry
Cite this
γ-Na0.96V2O5 : A New Competitive Cathode Material for Sodium-Ion Batteries Synthesized by a Soft Chemistry Route. / Emery, Nicolas; Baddour-Hadjean, Rita; Batyrbekuly, Dauren; Laïk, Barbara; Bakenov, Zhumabay; Pereira-Ramos, Jean Pierre.
In: Chemistry of Materials, Vol. 30, No. 15, 14.08.2018, p. 5305-5314.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - γ-Na0.96V2O5
T2 - A New Competitive Cathode Material for Sodium-Ion Batteries Synthesized by a Soft Chemistry Route
AU - Emery, Nicolas
AU - Baddour-Hadjean, Rita
AU - Batyrbekuly, Dauren
AU - Laïk, Barbara
AU - Bakenov, Zhumabay
AU - Pereira-Ramos, Jean Pierre
PY - 2018/8/14
Y1 - 2018/8/14
N2 - A new cathode material for sodium-ion batteries, the sodium vanadium bronze γ-Na0.96V2O5, is easily synthesized by chemical sodiation of the γ′-V2O5 polymorph at room temperature. This low-cost soft chemistry route leads to fine particles with high purity and high crystallinity. The crystal features and morphology of the γ-Na0.96V2O5 material have been characterized by X-ray diffraction, Raman spectroscopy, and scanning electron microscopy. It exhibits a layered structure with orthorhombic symmetry (Pnma space group) isomorphic to that of the lithiated γ-LiV2O5 bronze. This cathode material is evaluated by charge-discharge experiments. Promising electrochemical performance is outlined. A quantitative Na extraction process is observed at a high voltage of 3.4 V versus Na+/Na, and a reversible electrochemical behavior is demonstrated with an initial specific capacity of 125 mAh g-1, which remains at 112 mAh g-1 after 50 cycles at C/5. The structural reversibility of the sodium extraction-insertion reaction in γ-Na0.96V2O5 is demonstrated upon cycling. This new vanadium bronze competes with the well-known cathode materials for sodium-ion batteries such as NaNi1/3Mn1/3Co1/3O2 and NaFePO4.
AB - A new cathode material for sodium-ion batteries, the sodium vanadium bronze γ-Na0.96V2O5, is easily synthesized by chemical sodiation of the γ′-V2O5 polymorph at room temperature. This low-cost soft chemistry route leads to fine particles with high purity and high crystallinity. The crystal features and morphology of the γ-Na0.96V2O5 material have been characterized by X-ray diffraction, Raman spectroscopy, and scanning electron microscopy. It exhibits a layered structure with orthorhombic symmetry (Pnma space group) isomorphic to that of the lithiated γ-LiV2O5 bronze. This cathode material is evaluated by charge-discharge experiments. Promising electrochemical performance is outlined. A quantitative Na extraction process is observed at a high voltage of 3.4 V versus Na+/Na, and a reversible electrochemical behavior is demonstrated with an initial specific capacity of 125 mAh g-1, which remains at 112 mAh g-1 after 50 cycles at C/5. The structural reversibility of the sodium extraction-insertion reaction in γ-Na0.96V2O5 is demonstrated upon cycling. This new vanadium bronze competes with the well-known cathode materials for sodium-ion batteries such as NaNi1/3Mn1/3Co1/3O2 and NaFePO4.
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U2 - 10.1021/acs.chemmater.8b02066
DO - 10.1021/acs.chemmater.8b02066
M3 - Article
VL - 30
SP - 5305
EP - 5314
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 15
ER -