Preparation of novel electrode materials based on lithium niobium sulfides

Atsushi Sakuda, Tomonari Takeuchi, Hironori Kobayashi, Hikari Sakaebe, Kuniaki Tatsumi, Zempachi Ogumi

Research output: Contribution to journalArticlepeer-review

Abstract

Novel lithium niobium sulfide electrode materials, xLi2S·NbS2·(2-x)S (x = 1/2-2), were mechanochemically synthesized using Li2S, NbS2, and S8 as starting materials, and their electrochemical performance was investigated. The electrodes with x = 1/2 were in amorphous phase, while those with x = 1 and 3/2 are assigned as cubic phase. Cells prepared with these electrodes charge and discharge reversibly, with a capacity of ca. 400 mAh g-1. Within the wide operational voltage range 1.0-3.0V, Li3NbS4 charges and discharges with ca. 4.5-electron processes between Li0.4NbS4 and Li4.9NbS4. Li3NbS4 discharges even at a high current density of 2000 mA g-1 at 30°C.

Original languageEnglish
Pages (from-to)880-883
Number of pages4
JournalElectrochemistry
Volume82
Issue number10
DOIs
Publication statusPublished - 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electrochemistry

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