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Sustainable Redox Mediation for Lithium–Oxygen Batteries by a Composite Protective Layer on the Lithium‐Metal Anode
Author(s) -
Lee Dong Jin,
Lee Hongkyung,
Kim YunJung,
Park JungKi,
Kim HeeTak
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201503169
Subject(s) - redox , lithium (medication) , anode , materials science , layer (electronics) , mediator , composite number , mediation , nanotechnology , chemical engineering , electrode , metallurgy , chemistry , composite material , engineering , medicine , endocrinology , political science , law
A synergic combination of a soluble redox mediator and a protected Li metal electrode to prevent the self‐discharge of the redox mediator is realized by exploiting a 2,2,6,6‐tetramethylpiperidinyl 1‐oxyl (TEMPO) redox mediator and an Al 2 O 3 /PVdF‐HFP composite protective layer (CPL). Stabilization of Li metal by simple CPL coating is effective at suppressing the chemical reduction of the oxidized TEMPO and opens up the possibility of sustainable redox mediation for robust cycling of Li–O 2 batteries.