An O-2 cathode for rechargeable lithium batteries: The effect of a catalyst

Aurelie Debart, Jianli Bao, Graham Armstrong, Peter G. Bruce

Research output: Contribution to journalArticlepeer-review

557 Citations (Scopus)

Abstract

The energy density of current rechargeable lithium batteries is limited by the capacity of the LiCoO2 positive electrode (140 mA h g(-1)). The best intercalation electrode is only likely to increase this by a factor of 2 (1Li/Tm). Replacing the intercalation cathode with an O-2 electrode could raise the capacity 5-10-fold. Here, we explore the influence of the catalyst could have on the performance of a non-aqueous O-2 electrode on a Li/O-2 cell. Of the catalysts studied the highest initial capacity was observed with Fe2O3 (2700 mA h g(-1)), the highest capacity retention with Fe3O4, CuO and CoFe2O4 (6.67% per cycle). Co3O4 gives the best compromise between initial capacity (2000 mA h g(-1)) and capacity retention (6.5% per cycle), as well as the lowest charging voltage 4 V. All capacities expressed per gram of carbon and at a rate of 70 mA g(-1). (C) 2007 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)1177-1182
Number of pages6
JournalJournal of Power Sources
Volume174
DOIs
Publication statusPublished - 6 Dec 2007

Keywords

  • Li/O-2 batteries
  • rechargeable lithium batteries
  • catalyst
  • OXYGEN REDUCTION
  • ION BATTERIES
  • ELECTROLYTE
  • PERFORMANCE
  • ANODES

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