Composite LiFePO4/poly-3,4-ethylenedioxythiophene cathode for lithium-ion batteries with low content of non-electroactive components

Research output

14 Citations (Scopus)

Abstract

© 2015 The Authors.Environmentally friendly and inexpensive olivine-type compound LiFePO4 is one of the most promising cathode materials for lithium-ion batteries. Its poor electrical conductivity, however, requires introduction of large amounts of conductive carbon additives into LiFePO4 - based cathode materials. The total content of conductive carbon additives and inactive polymeric binders reaches up to 15-20 wt.% of the mass of the electrode material. Therefore, one of the ways to increase electrode capacity is to reduce the amount of inactive components, in particular, by replacing them with conducting polymer. Here, we propose a new LiFePO4 - based electrode composition comprising very high content (99.5 wt.%) of electroactive carbon-coated LiFePO4 and a small amount (0.5 wt.%) of conducting polymer poly-3,4-ethylenedioxythiophene doped with polystyrene sulfonate (PEDOT:PSS), serving as a binder and conducting additive. Gravimetric energy density of these composite electrodes (147 mAhg-1 at 0.2 C) is 1
Original languageEnglish
Pages (from-to)8175-8189
Number of pages15
JournalInternational Journal of Electrochemical Science
Volume10
Issue number10
Publication statusPublished - 2015

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