Journal of Electrochemical Science and Technology

  • 제12권2호
  • /
  • Pages.272-278
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  • 2021
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  • 2093-8551(pISSN)
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  • 2288-9221(eISSN)
한국전기화학회 (The Korean Electrochemical Society)
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Yttrium-doped and Conductive Polymer-Coated High Nickel Layered Cathode Material with Enhanced Structural Stability

  • Shin, Ji-Woong (Department of Nano-Polymer Science & Engineering Korea National University of Transportation) ;
  • Lee, Seon-Jin (Department of Nano-Polymer Science & Engineering Korea National University of Transportation) ;
  • Nam, Yun-Chae (Department of Nano-Polymer Science & Engineering Korea National University of Transportation) ;
  • Son, Jong-Tae (Department of Nano-Polymer Science & Engineering Korea National University of Transportation)
  • 투고 : 2020.09.18
  • 심사 : 2021.01.26
  • 발행 : 2021.05.28
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초록

In this study, high nickel layered LiNi0.8Co0.1Mn0.1O2 cathode materials for lithium-ion batteries were modified by yttrium doping and poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) coating. The effects of yttrium doping and PEDOT:PSS coating on the structural and electrochemical properties of the LiNi0.8Co0.1Mn0.1O2 cathode material were investigated and compared. The substitution of nickel with an electrochemically inert yttrium was confirmed to be successful in stabilizing the layered structure framework. Moreover, coating the surfaces of the LiNi0.8Co0.1Mn0.1O2 particles with a conductive polymer, PEDOT:PSS, improved the capacity retention, thermal stability, and impedance of the cathode material by increasing its ionic and electric conductivities.

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과제정보

This study was supported by the granted financial resource from the Ministry of SMEs and Startups, Republic of Korea (S2928638) and the National Research Foundation of Korea (NRF) funded by the Korea government (MSIT, No. 2019R1F1A1057220) and by the Technology Innovation Program (or Industrial Strategic Technology Development Program-Material Parts Technology Development Project) (20003747, Development of high-performance cathode material manufacturing technology through valuable metal upcycling from waste battery and waste cathode material) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea) and the Korea Agency for Infrastructure Technology.

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