Sodium storage capability of spinel Li4Mn5O12

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)76-82
Journal / PublicationElectrochimica Acta
Volume185
Publication statusPublished - 10 Dec 2015

Abstract

Spinel Li4Mn5O12, a well-known 3 V Li-ion battery (LIB) material with excellent cycling stability and good rate capability, is examined as Na-ion battery (NIB) cathode for the first time. Electrochemical studies clearly show that Na ions can be reversibly inserted into and extracted from the three-dimensional spinel structure. However, unlike in LIB, the available capacity in NIB is strongly dependent on the particle size and current rate due to the sluggish Na-ion transport in solid phase. Cycle performance of Li4Mn5O12 in NIB is also inferior to that in LIB. Ex-situ X-ray diffraction study indicates a gradual loss of crystallinity with cycling, and that the crystal lattice undergoes an irreversible expansion during the initial 20 cycles. Inductively coupled plasma spectroscopy shows a decrease of Li/Mn ratio in Li4Mn5O12 with cycling. The results suggest that Li ions are removed from the material during the charging process. The charge-discharge mechanism is also discussed in the paper.

Research Area(s)

  • Cathode, Ion exchange, Particle size effect, Sodium-ion battery, Spinel

Citation Format(s)

Sodium storage capability of spinel Li4Mn5O12. / Zhang, Jiaolong; Wang, Wenhui; Li, Yingshun; Yu, Denis Y.W.

In: Electrochimica Acta, Vol. 185, 10.12.2015, p. 76-82.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review