Synthesis of Na2FePO4F using polytetrafluoroethylene

Atsushi TSU-URA; Hirotaka TORII; Takuya HASEGAWA; Dai MURAYAMA; Sun Woog KIM; Kazuyoshi UEMATSU; Kenji TODA; Mineo SATO

doi:10.2109/jcersj2.17230

Feature: Cutting edge researches on electroceramics, 2017: Full papers

Synthesis of Na₂FePO₄F using polytetrafluoroethylene

Atsushi TSU-URA, Hirotaka TORII, Takuya HASEGAWA, Dai MURAYAMA, Sun Woog KIM, Kazuyoshi UEMATSU, Kenji TODA, Mineo SATO

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Keywords: Fluoride electrode materials, Polytetrafluoroethylene, Na-ion battery, Na₂FePO₄F

JOURNAL FREE ACCESS

2018 Volume 126 Issue 5 Pages 336-340

DOI https://doi.org/10.2109/jcersj2.17230

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Abstract

Polytetrafluoroethylene (PTFE), composed of fluorine and carbon atoms, has a potential to produce carbon-coated fluorides in the calcination of inorganic compounds. We synthesized high voltage cathode material for Na ion secondary battery, Na₂FePO₄F, using PTFE as the carbon-coating and fluorine source. The Na₂FePO₄F carbon-coated by a thermal decomposition of PTFE showed high discharge capacity (64.4 mAh g⁻¹) at the first cycle of galvanostatic cycling by the improvement of conductivity.

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