Mechanochemical synthesis of NaMF3 (M = Fe, Mn, Ni) and their electrochemical properties as positive electrode materials for sodium batteries

Irina D. Gocheva, Manabu Nishijima, Takayuki Doi, Shigeto Okada, Jun ichi Yamaki, Tetsuaki Nishida

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Mechanical treatment was used as a nonconventional solid-state process for large-scale preparation of fluoride materials as an alternative to the hazardous high-pressure fluorination route. Sodium fluoroperovskites of Fe, Mn, and Ni were achieved by mechanical grinding of NaF and binary metal fluorides for different periods of time under Ar. The obtained monophases were characterized by XRD measurements, AAS, ICP-OES, and IC. The electrochemical performance of the achieved materials was tested in a Na half-cell under different operating conditions. It was revealed that mechanochemically inserted sodium is electrochemically active for the NaFeF3 positive electrode composition. In this pilot study, NaFeF3 showed an initial discharge capacity of 130 mA h g-1 at 0.2 mA cm-2.

元の言語英語
ページ(範囲)247-252
ページ数6
ジャーナルJournal of Power Sources
187
発行部数1
DOI
出版物ステータス出版済み - 2 1 2009

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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