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Intercalation of CoO in S‐Doped Graphite as High‐Performance Anodes for Lithium‐Ion Batteries
Author(s) -
Ma Xinlong,
Song Xinyu,
Tang Yushu,
Qi Chuanlei,
Ning Guoqing,
Gao Jinsen,
Li Yongfeng
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.201700284
Subject(s) - graphite , intercalation (chemistry) , materials science , calcination , anode , lithium (medication) , chemical engineering , battery (electricity) , doping , lithium ion battery , nanoparticle , inorganic chemistry , nanotechnology , electrode , catalysis , composite material , chemistry , organic chemistry , power (physics) , medicine , physics , optoelectronics , quantum mechanics , engineering , endocrinology
The intercalation of CoO nanoparticles (NPs) in S‐graphite (labeled as CoO@S–graphite) composite is obtained by a one‐step doping reaction between graphite and CoSO 4 in a fluidized bed reactor. CoO@S–graphite presents increased specific surface area and higher intensity ratio of the D to G band compared with the pristine graphite owing to the etching effect during the calcination treatment. As an anode material for lithium‐ion batteries, the enhanced energy‐storage ability of the as‐synthesized compound is a result of the S doping and CoO NPs intercalation, which not only contributes to enhancing the rate capability, but also has no impact on the outputs of delithiation capacity and voltage plateau below 0.5 V. The configured CoO@S–graphite/LiFePO 4 battery exhibits better rate capability than that based on graphite/LiFePO 4 and affords a high reversible capacity of 160 mAh g −1 at 0.2C and excellent durability.