Cyclohexanehexone with Ultrahigh Capacity as Cathode Materials for Lithium‐Ion Batteries. (16th April 2019)

• Record Type: Journal Article
• Authors: Lu, Yong; Hou, Xuesen; Miao, Licheng; Li, Lin; Shi, Ruijuan; Liu, Luojia; Chen, Jun
• Is Part Of: Angewandte Chemie. Volume 131:Number 21(2019)
• Page Start: 7094
• Page End: 7098
• Publication Date: 2019-04-16
• Subjects: Cyclohexanhexon -- Kathodenmaterialien -- Lithium-Ionen-Batterien -- Organische Carbonyl-Materialien; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201902185
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: 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 (C6 O6 ), 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 −1 C 6 O 6 ). A preliminary cycling test shows that C6 O6 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.