Bio-inspired 2-line ferrihydrite as a high-capacity and high-rate-capability anode material for lithium-ion batteries

Hideki Hashimoto, Masahiro Ukita, Ryo Sakuma, Makoto Nakanishi, Tatsuo Fujii, Nobuyuki Imanishi, Jun Takada

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A high-capacity and high-rate-capability anode material for lithium-ion batteries, silicon-doped iron oxyhydroxide or 2-line ferrihydrite (2Fh), was prepared by mixing iron nitrate powder, tetraethyl orthosilicate, 2-propanol, and ammonium hydrogen carbonate powder at room temperature. The design of this material was inspired by a bacteriogenic product, a nanometric amorphous iron-based oxide material containing small amounts of structural Si. The atomistic structure of the prepared Si-doped 2Fh was strongly affected by the Si molar ratio [x = Si/(Fe + Si)]. Its crystallinity gradually decreased as the Si molar ratio increased, with a structural variation from nanocrystalline to amorphous at x = 0.25. The sample with x = 0.20 demonstrated the best Li storage performance. The developed material exhibited a high capacity of ∼400 mAh g−1 at the 25th cycle in the voltage range of 0.3–3.0 V and at a current rate of 9 A g−1, which was three times greater than that of the Si-free 2Fh. This indicates that Si-doping into the 2Fh structure realizes good rate capability, which are presumably because of the specific nanocomposite structure of iron-based electrochemical centers embedded in the Si-based amorphous matrix, generated by reversible Li insertion/deinsertion process.

Original languageEnglish
Pages (from-to)503-509
Number of pages7
JournalJournal of Power Sources
Volume328
DOIs
Publication statusPublished - Oct 1 2016

Fingerprint

electric batteries
Anodes
anodes
lithium
Iron
iron
Powders
ions
tetraethyl orthosilicate
2-Propanol
Propanol
Silicon
Bicarbonates
Ammonium Compounds
Nitrates
Oxides
nitrates
insertion
Carbonates
crystallinity

Keywords

  • 2-Line ferrihydrite
  • Bacteriogenic iron-based oxide
  • Lithium-ion batteries
  • Si-doped 2-line ferrihydrite

ASJC Scopus subject areas

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

Cite this

Bio-inspired 2-line ferrihydrite as a high-capacity and high-rate-capability anode material for lithium-ion batteries. / Hashimoto, Hideki; Ukita, Masahiro; Sakuma, Ryo; Nakanishi, Makoto; Fujii, Tatsuo; Imanishi, Nobuyuki; Takada, Jun.

In: Journal of Power Sources, Vol. 328, 01.10.2016, p. 503-509.

Research output: Contribution to journalArticle

Hashimoto, Hideki ; Ukita, Masahiro ; Sakuma, Ryo ; Nakanishi, Makoto ; Fujii, Tatsuo ; Imanishi, Nobuyuki ; Takada, Jun. / Bio-inspired 2-line ferrihydrite as a high-capacity and high-rate-capability anode material for lithium-ion batteries. In: Journal of Power Sources. 2016 ; Vol. 328. pp. 503-509.
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