title: Surface Modification of Li-Rich Cathode Materials for Lithium-Ion Batteries with a PEDOT:PSS Conducting Polymer.
abstract: Composites of lithium-rich Li1.2Ni0.2Mn0.6O2 and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (
  PSS) are synthesized through coprecipitation followed by a wet coating method. In the resulting samples, the amorphous conductive polymer films on the surface of the Li1.2Ni0.2Mn0.6O2 particles are 5-20 nm thick. The electrochemical properties of Li1.2Ni0.2Mn0.6O2 are obviously enhanced after
  PSS coating. The composite sample with an optimal 3 wt % coating exhibits rate capability and cycling properties that are better than those of Li1.2Ni0.2Mn0.6O2, with an excellent initial discharge capacity of 286.5 mA h g(-1) at a current density of 0.1 C and a discharge capacity that remained at 146.9 mA h g(-1) at 1 C after 100 cycles. The improved performances are ascribed to the high conductivity of the
  PSS coating layer, which can improve the conductivity of the composite material. The
  PSS layer also suppresses the formation and growth of a solid electrolyte interface. Surface modification with
  PSS is a feasible approach for improving the comprehensive properties of cathode materials.
authors.affiliation: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, China.|Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Wu
authors.affiliation: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, China.
authors.forename: Jianrui
authors.initials: J
authors.lastname: Liu
authors.affiliation: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, China.|Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, China.
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.affiliation: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, China.
authors.forename: Xiaoxiao
authors.initials: X
authors.lastname: Zhang
authors.affiliation: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Luo
authors.affiliation: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, China.
authors.forename: Yusheng
authors.initials: Y
authors.lastname: Ye
authors.affiliation: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, China.|Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, China.
authors.forename: Renjie
authors.initials: R
authors.lastname: Chen
keywords: PEDOT:PSS; cathode material; electrochemical properties; lithium-ion battery; surface modification