Premium
Advancing Lithium–Oxygen Battery Technology with an Iron–Nitrogen‐Doped Mesoporous Core–Shell Carbon Cathode Loaded with Ruthenium(IV) Oxide Nanoparticles
Author(s) -
Zhou Ming,
Li ChiYing Vanessa,
Chan KwongYu
Publication year - 2017
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201600468
Subject(s) - materials science , carbon fibers , cathode , mesoporous material , lithium (medication) , ruthenium , catalysis , inorganic chemistry , chemical engineering , nanoparticle , oxygen , nanotechnology , chemistry , composite material , composite number , organic chemistry , medicine , engineering , endocrinology
Abstract An iron‐nitrogen‐doped core–shell mesoporous carbon support loaded with a RuO 2 catalyst was used as a Li–O 2 cathode. Corrosion and degradation problems were avoided by doping carbon with iron and nitrogen. Well‐dispersed RuO 2 in the hierarchical porous structure facilitated a reversible nanoscale solid‐phase reaction. At 2.0 A g −1 (on the basis of catalyst plus carbon support), a capacity of 10 Ah g −1 was demonstrated with a discharge potential of 2.4 V and a corresponding recharge potential of 3.6 V. On the other hand, at 1.0 A g −1 , the discharge and recharge potentials are maintained at 2.5 V and 3.5 V, respectively, over 50 cycles.