Fabrication of Li2NiF4-PEDOT nanocomposites as conversion cathodes for lithium-ion batteries

Li2NiF4-PEDOT nanocomposites have been fabricated through a two-step strategy including ethanolthermal synthesis of Li2NiF4 spheres with nanoparticle subunits and later polymerization of 3,4-ethylenedioxythiophene (EDOT). The Li2NiF4-PEDOT nanocomposites deliver a high discharge capacity of 548 mAh g(-1) and maintain the reversible capacity of 303 mAh g(-1) over forty cycles. Based on a series of detailed characterizations and comparison experiments, we analyzed the lithium storage process of Li2NiF4-PEDOT nanocomposites and proposed the causation of PEDOT improving electrochemical properties. (C) 2017 Elsevier B.V. All rights reserved.