Premium
Carbon Cathodes in Rechargeable Lithium–Oxygen Batteries Based on Double‐Lithium‐Salt Electrolytes
Author(s) -
Yoo Eunjoo,
Zhou Haoshen
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201600177
Subject(s) - lithium (medication) , electrolyte , electrochemistry , materials science , carbon fibers , electrode , graphene , chemical engineering , cathode , carbon black , carbon nanotube , oxygen , conductivity , inorganic chemistry , nanotechnology , chemistry , composite number , composite material , organic chemistry , medicine , natural rubber , engineering , endocrinology
The use of carbon materials as air electrodes in lithium–oxygen (Li–O 2 ) batteries is known to be advantageous owing to their good conductivity and because they offer sites suitable for the reversible electrode reactions. However, the exact influence of carbon materials on the electrochemical performance of Li–O 2 batteries is not clear. In this study the electrochemical performance of four different types of carbon materials (multiwalled carbon nanotubes (MWCNTs), CMK‐3, graphene nanosheets (GNSs), and Ketjen Black (KB)) as air electrodes is examined. We find that a Li–O 2 cell based on an electrode of multiwalled carbon nanotubes (MWCNTs) demonstrates good rate performance and cycle stability, when using LiNO 3 –LiTFSI/DMSO as electrolyte. Li–O 2 cells based on such MWCNT electrodes, with a cut‐off capacity of 1000 mAh g −1 at 500 mA g −1 , can undergo around 90 cycles without obvious losses of capacity. Even when the discharge depth is increased to 2000 mA h g −1 , stable cycling is maintained for 45 cycles at a charge potential below 4.0 V.