Na2/3Ni1/3Ti2/3O2: "bi-functional" electrode materials for Na-Ion batteries

Rengarajan Shanmugam, Wei Laiz

Research output: Contribution to journalArticle

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Abstract

In this paper, we demonstrate the electrochemical properties of a P2-type layered oxide, Nax(Ni2+)1/3(Ti 4+)2/3O2 (x = 2/3), as "bi- functional" electrode material for room temperature, non-aqueous Na-ion batteries. Making use of the high-voltage redox couple Ni2+/Ni 3+ or the low-voltage redox couple Ti4+/Ti3+, we substantiate Na2/3Ni1/3Ti2/3O2 can function either as a cathode with an average voltage of 3.7 V and 75 mAh/g at C/20 or a anode with an average voltage of 0.7 V and 75 mAh/g at C/20. The cathodic Na2/3Ni1/3Ti2/3O2 displays reversible sodium insertion/extraction but has a lower rate capability compared with anodic Na2/3Ni1/3Ti2/3O2.

LanguageEnglish (US)
JournalECS Electrochemistry Letters
Volume3
Issue number4
DOIs
StatePublished - 2014

Profile

Ions
Electrodes
Electric potential
Electrochemical properties
Oxides
Anodes
Cathodes
Sodium
Display devices
Temperature
Oxidation-Reduction

ASJC Scopus subject areas

  • Electrochemistry
  • Materials Chemistry
  • Fuel Technology

Cite this

Na2/3Ni1/3Ti2/3O2 : "bi-functional" electrode materials for Na-Ion batteries. / Shanmugam, Rengarajan; Laiz, Wei.

In: ECS Electrochemistry Letters, Vol. 3, No. 4, 2014.

Research output: Contribution to journalArticle

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