화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.83, 14-19, March, 2020
DOI10.1016/j.jiec.2019.11.015  Export Citation
Enhanced cycle stability of rechargeable Li-O2 batteries using immobilized redox mediator on air cathode
Ji-Hoon Baik1, Su Young Lee1, 2, Kihyun Kim3, Seongjun Bae1, 2, Sangwan Kim1, Soyoul Kwak4, Dong Gi Hong1, Inho Nam4, †, Jongheop Yi1, 2, †, and Jong-Chan Lee1, †
  • 1School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
  • 2WCU Program of C2E2, ICP, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
  • 3School of Materials Science and Engineering Polymer Science and Engineering, Gyeongsang National University, 501 Jinju-daero, Jinju, 660-701, Republic of Korea
  • 4School of Chemical Engineering & Materials Science, Institute of Energy Converting Soft Materials, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
E-mail:, ,
Overcoming the low round-trip energy efficiency and poor cycle stability of lithium-oxygen (Li-O2) batteries still remains a challenge. Here, we show that 2,2,6,6,-tetramethylpiperidinyl-1-oxyl (TEMPO)-immobilized air cathode can effectively reduce the charge voltage and increase the cycle stability in Li-O2 batteries. The TEMPO-immobilized air cathode is prepared using a gas diffusion layer by a simple dip coating method, in which polydopamine is used as a linker. In this method, the immobilized TEMPO on the cathode does not crossover to the anode, and the consumption of TEMPO by side reactions is minimized. As a result, the redox mediation by TEMPO is well maintained in its immobilized state. This highlights that the use of an immobilized redox mediator can be a rational strategy for expanding the practical applications of Li-O2 batteries.
Keywords:Lithium-oxygen batteries;Redox mediator;2,2,6,6,-tetramethylpiperidinyl-1-oxyl;Polydopamine;Modified air cathode
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