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Cyclohexanehexone with Ultrahigh Capacity as Cathode Materials for Lithium‐Ion Batteries
Author(s) -
Lu Yong,
Hou Xuesen,
Miao Licheng,
Li Lin,
Shi Ruijuan,
Liu Luojia,
Chen Jun
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201902185
Subject(s) - solubility , electrolyte , lithium (medication) , cathode , electrochemistry , raman spectroscopy , materials science , ion , chemical engineering , ionic liquid , ionic bonding , polarity (international relations) , analytical chemistry (journal) , inorganic chemistry , chemistry , electrode , organic chemistry , medicine , biochemistry , physics , engineering , optics , cell , endocrinology , catalysis
Organic carbonyl compounds show potential as cathode materials for lithium‐ion batteries (LIBs) but the limited capacities (<600 mA h g −1 ) and high solubility in electrolyte restrict their further applications. Herein we report the synthesis and application of cyclohexanehexone (C 6 O 6 ), which exhibits an ultrahigh capacity of 902 mA h g −1 with an average voltage of 1.7 V at 20 mA g −1 in LIBs (corresponding to a high energy density of 1533 Wh kg −1C6 O6). A preliminary cycling test shows that C 6 O 6 displays a capacity retention of 82 % after 100 cycles at 50 mA g −1 because of the limited solubility in high‐polarity ionic liquid electrolyte. Furthermore, the combination of DFT calculations and experimental techniques, such as Raman and IR spectroscopy, demonstrates the electrochemical active C=O groups during discharge and charge processes.