화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.14, No.3, 371-376, May, 2008
DOI10.1016/j.jiec.2007.12.002  Export Citation
Organic radical battery with PTMA cathode: Effect of PTMA content on electrochemical properties
Jae-Kwang Kim, Gouri Cheruvally, Jou-Hyeon Ahn†, Yang-Gon Seo, Doo Seong Choi1, Seo-Hwan Lee1, and Choong Eui Song1, †
  • Department of Chemical and Biological Engineering and Engineering Research Institute, Gyeongsang National University, Jinju 660-701, Korea
  • 1Institute of Basic Science and Department of Chemistry, Sungkyunkwan University, Suwon,Gyeonggi-do 440-746, Korea
E-mail:,
The nitroxide radical polymer, poly(2,216,6-tetramethylpiperidinyloxy-4-ylmethacrylate) (PTMA) is gaining increasing attention as a promising cathode-active material for high-rate capable, organic radical batteries (ORBs). This study evaluates the effect of varying PTMA content (20, 40 and 60 wt.%) on the cathode morphology and electrochemical properties of the ORB operating at room temperature with lithium metal anode and 1 M LiPF6 in ethylene carbonate (EC)/dimethyl carbonate (DMC) electrolyte. The cathodes with 20 and 40% of PTMA exhibited uniform particle morphology with a thin layer of polymer coating and these resulted in achieving 100% utilization of the active material (111 mAh/g specific capacity for the cell) at moderate Grates. The cathode with 60% of PTMA exhibited larger ohmic resistance and lower charge-discharge properties due to the thicker layer of insulating polymer. The maximum discharge capacities at very high C-rates of 30 and 50 C were realized from the 20% PTMA cathode that has the highest carbon content and hence the lowest ohmic resistance. The Li/PTMA cells exhibited good performance on long-term cycling at 1 C, irrespective of the PTMA content in the cathode. (C) 2008 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
Keywords:organic radical battery;PTMA;cathode material;lithium secondary batteries
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