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Title: pH-regulative synthesis of Na3(VPO4)2F3 nanoflowers and their improved Na cycling stability

Journal Article · · Journal of Materials Chemistry. A
DOI:https://doi.org/10.1039/C6TA01023G· OSTI ID:1311298
 [1];  [2];  [2];  [3];  [2];  [4]
  1. Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Chinese Academy of Sciences, Beijing (People's Republic of China)
  2. Chinese Academy of Sciences (CAS), Beijing (China)
  3. Univ. of Chinese Academy of Sciences, Beijing (People's Republic of China); Chinese Academy of Sciences (CAS), Beijing (China)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
+ Show Author Affiliations

Na-ion batteries are becoming increasingly attractive as a low cost energy storage device. Sodium vanadium fluorophosphates have been studied extensively recently due to their high storage capacity and high discharge voltage. Shape and size often have a crucial influence over the properties. The controlling synthesis of nanoparticles with special microstructures is significant, which becomes a challenging issue and has drawn considerable attention. In this study, Na3(VPO4)2F3 nanoflowers have been synthesized via a pH-regulative low-temperature (120 °C) hydro-thermal route. In particular, it is a green route without any organic compounds involved. The hydro-thermal reaction time for the formation of Na3(VPO4)2F3 nanoflowers has also been investigated. A weak acid environment (pH = 2.60) with the possible presence of hydrogen fluoride molecules is necessary for the formation of the desired nanoflower microstructures. Moreover, compared to the nanoparticles obtained by Na2HPO4·12H2O, the as-synthesized Na3(VPO4)2F3 nanoflowers showed an excellent Na-storage performance in terms of superior cycle stability, even without any further carbon coating or high-temperature treatment.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1311298
Journal Information:
Journal of Materials Chemistry. A, Vol. 4, Issue 19; ISSN 2050-7488
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 69 works
Citation information provided by
Web of Science

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Cited By (10)

Phosphate Framework Electrode Materials for Sodium Ion Batteries journal January 2017
The rapid microwave-assisted hydrothermal synthesis of NASICON-structured Na 3 V 2 O 2x (PO 4 ) 2 F 3−2x (0 < x ≤ 1) cathode materials for Na-ion batteries journal January 2019
Research progress on vanadium-based cathode materials for sodium ion batteries journal January 2018
Advanced Nanostructured Anode Materials for Sodium-Ion Batteries journal September 2017
Caging Na 3 V 2 (PO 4 ) 2 F 3 Microcubes in Cross-Linked Graphene Enabling Ultrafast Sodium Storage and Long-Term Cycling journal July 2018
Synthesis of uniform hierarchical Na 3 V 1.95 Mn 0.05 (PO 4 ) 2 F 3 @C hollow microspheres as a cathode material for sodium-ion batteries journal January 2018
Ultralong needle-like N-doped Co(OH)F on carbon fiber paper with abundant oxygen vacancies as an efficient oxygen evolution reaction catalyst journal January 2018
An Overview of Mixed Polyanionic Cathode Materials for Sodium‐Ion Batteries journal September 2018
Investigating low-valent compositions in the Na 3 V 2 O 2x (PO 4 ) 2 F 3−2x family: structural transitions and their consequences journal January 2018
One-Step Synthesis of Carbon-Coated Na3(VOPO4)2F Using Biomass as a Reducing Agent and Their Electrochemical Properties journal August 2018

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