Premium
Nitrogen‐doped Porous Carbon Obtained from Silk Cocoon for High Performance Li‐O 2 Batteries
Author(s) -
Liu Jiuqing,
Zhao Haijun,
Zhu Fangfang,
Yu Wanjing,
Li Jie,
Li Qihou,
Wang Cheng
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901524
Subject(s) - overpotential , materials science , battery (electricity) , cathode , electrochemistry , carbon fibers , chemical engineering , nitrogen , porosity , ionic liquid , nanotechnology , composite material , electrode , chemistry , catalysis , thermodynamics , organic chemistry , power (physics) , physics , composite number , engineering
Nitrogen‐doped porous carbon obtained from silk cocoon (NCFC) was first used as cathodes for Li‐O 2 batteries with ionic liquid in this paper. NCFC is made up of irregular bending slices and has a high specific discharge product of most Li‐O 2 surface area of 2142.0 m 2 g −1 which means numerous active sites for electrochemical reactions. The results show that NCFC based Li‐O 2 battery has good cycle stability and high energy efficiency under different current density. In particular, NCFC based Li‐O 2 batteries can work more than 400 cycles (500 mAh g −1 at 0.20 mA cm −2 ) with the maximum overpotential less than 0.92 V, which is much better than super P based Li‐O 2 batteries (188 cycles with overpotential up to 1.88 V) and many reported Li‐O 2 batteries. The results show that NCFC is a very promising material for Li‐O 2 batteries.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom