Unexpected performance of layered sodium-ion cathode material in ionic liquid-based electrolyte

Chagas L.G., Buchholz D., Wu L., Vortmann B., Passerini S.

Research article (journal)

Abstract

The electrochemical performance of Na0.45Ni 0.22Co0.11Mn0.66O2 in an ionic liquid-based electrolytic solutions is reported and compared with that obtained in a conventional, carbonate-based electrolyte. Even at ambient temperature, the Na-ion intercalation material reveals a much better electrochemical performance in 10 mol% NaTFSI (or 0.45 M) in PYR14FSI electrolyte than 0.5 M NaPF6 in PC electrolyte in terms of specific capacity and cycling stability. In particular, the electrodes cycled in the IL-based electrolyte combine a capacity retention of about 80% after 100 cycles with high specific capacities (about 200 mAh g-1) and high average voltage (2.7 V vs. Na/Na+), demonstrating that Na0.45Ni0.22Co 0.11Mn0.66O2 is a promising cathode material for sodium-ion batteries. © 2013 Elsevier B.V. All rights reserved.

Details about the publication

JournalJournal of Power Sources
Volume247
Issuenull
Page range377-383
StatusPublished
Release year2014
Language in which the publication is writtenEnglish
DOI10.1016/j.jpowsour.2013.08.118
Link to the full texthttp://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84884559638
KeywordsIonic liquid-based electrolyte Sodium battery; Layered compound; Sodium Cathode material

Authors from the University of Münster

Buchholz, Daniel
Institute of Physical Chemistry
Vortmann, Britta
Institute of Physical Chemistry