Exploring the Capacitive Behavior of Carbon Functionalized with Cyclic Ethers: A Rational Strategy To Exploit Oxygen Functional Groups for Enhanced Capacitive Performance

2019 ◽  
Vol 11 (21) ◽  
pp. 19056-19065 ◽  
Author(s):  
Junghyun Lee ◽  
Muhammad A. Abbas ◽  
Jin Ho Bang
Keyword(s):  
Functional Groups ◽  
Cyclic Ethers ◽  
Capacitive Performance ◽  
Capacitive Behavior ◽  
Oxygen Functional Groups

scholarly journals Electrochemical Evaluation of Surface Modified Free-Standing CNT Electrode for Li–O2 Battery Cathode

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4196
Author(s):  
Ji Hyeon Lee ◽  
Hyun Wook Jung ◽  
In Soo Kim ◽  
Min Park ◽  
Hyung-Seok Kim
Keyword(s):  
Functional Groups ◽  
Atomic Layer ◽  
Free Standing ◽  
Coating Technology ◽  
Oxygen Functional Groups ◽  
Layer Deposition ◽  
Discharge Product ◽  
Effect Of Oxygen ◽  
Surface Modified ◽  
Electrochemical Evaluation

In this study, carbon nanotubes (CNTs) were used as cathodes for lithium–oxygen (Li–O2) batteries to confirm the effect of oxygen functional groups present on the CNT surface on Li–O2 battery performance. A coating technology using atomic layer deposition was introduced to remove the oxygen functional groups present on the CNT surface, and ZnO without catalytic properties was adopted as a coating material to exclude the effect of catalytic reaction. An acid treatment process (H2SO4:HNO3 = 3:1) was conducted to increase the oxygen functional groups of the existing CNTs. Therefore, it was confirmed that ZnO@CNT with reduced oxygen functional groups lowered the charging overpotential by approximately 230 mV and increased the yield of Li2O2, a discharge product, by approximately 13%. Hence, we can conclude that the ZnO@CNT is suitable as a cathode material for Li–O2 batteries.

ChemInform Abstract: Graphene Oxide Catalyzed C-H Bond Activation: The Importance of Oxygen Functional Groups for Biaryl Construction.

ChemInform ◽  
2016 ◽  
Vol 47 (26) ◽  
Author(s):  
Yongjun Gao ◽  
Pei Tang ◽  
Hu Zhou ◽  
Wei Zhang ◽  
Hanjun Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Functional Groups ◽  
Bond Activation ◽  
Oxygen Functional Groups
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