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Three Dimensionally Ordered Mesoporous Carbon as a Stable, High‐Performance Li–O 2 Battery Cathode
Author(s) -
Xie Jin,
Yao Xiahui,
Cheng Qingmei,
Madden Ian P.,
Dornath Paul,
Chang ChunChih,
Fan Wei,
Wang Dunwei
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201410786
Subject(s) - cathode , gravimetric analysis , carbon fibers , atomic layer deposition , materials science , battery (electricity) , mesoporous material , chemical engineering , reactivity (psychology) , layer (electronics) , nanotechnology , catalysis , chemistry , organic chemistry , composite material , composite number , medicine , quantum mechanics , pathology , power (physics) , physics , alternative medicine , engineering
Enabled by the reversible conversion between Li 2 O 2 and O 2 , Li–O 2 batteries promise theoretical gravimetric capacities significantly greater than Li‐ion batteries. The poor cycling performance, however, has greatly hindered the development of this technology. At the heart of the problem is the reactivity exhibited by the carbon cathode support under cell operation conditions. One strategy is to conceal the carbon surface from reactive intermediates. Herein, we show that long cyclability can be achieved on three dimensionally ordered mesoporous (3DOm) carbon by growing a thin layer of FeO x using atomic layer deposition (ALD). 3DOm carbon distinguishes itself from other carbon materials with well‐defined pore structures, providing a unique material to gain insight into processes key to the operations of Li–O 2 batteries. When decorated with Pd nanoparticle catalysts, the new cathode exhibits a capacity greater than 6000 mAh g carbon −1 and cyclability of more than 68 cycles.