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Carbon Nanosheet Anode for Sodium‐Ion Storage and Its Application in Sodium‐Ion Hybrid Capacitors
Author(s) -
Chen Li,
Duan Wenhui,
Yang Bingjun,
Liu Bao,
Li Hongxia,
Lang Junwei,
Chen Jiangtao
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202001696
Subject(s) - anode , nanosheet , materials science , capacitor , sodium , cathode , carbon fibers , electrochemistry , energy storage , battery (electricity) , ion , chemical engineering , voltage , nanotechnology , electrode , composite material , electrical engineering , chemistry , power (physics) , metallurgy , physics , engineering , quantum mechanics , composite number , organic chemistry
In this study, sodium ion hybrid capacitors (SIHCs) constructed by using battery‐type carbon nanosheet (CNS) as anode and capacitive activated carbon (AC) as cathode are reported. The CNSs with large interlayer spacing were deposited on Na 2 CO 3 powder by using chemical vapor deposition method. The CNS anode for sodium ion storage exhibits outstanding rate capability (138 mAh g −1 at 10 A g −1 , 63 % retention of the capacity at 0.05 A g −1 ) and excellent long‐term cyclability at 10 A g −1 after 12500 cycles. Benifting from high performance of anodes abovemensioned, the assembled SIHC based on CNS and AC, operated in a voltage window of 1.0∼4.0 V, delivers a high specific energy of 135 Wh kg −1 at 250 W kg −1 and a maximum power of 25 kW kg −1 with the output 69 Wh kg −1 .