High-capacity pseudocapacitive Li storage on functional nanoporous carbons with parallel mesopores

Zeng, Qingcong and Wang, Da-Wei (2016) High-capacity pseudocapacitive Li storage on functional nanoporous carbons with parallel mesopores. Energy Storage Materials, 2 14-20. doi:10.1016/j.ensm.2015.11.006


Author Zeng, Qingcong
Wang, Da-Wei
Title High-capacity pseudocapacitive Li storage on functional nanoporous carbons with parallel mesopores
Journal name Energy Storage Materials
ISSN 2405-8297
Publication date 2016-01-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.ensm.2015.11.006
Open Access Status Not Open Access
Volume 2
Start page 14
End page 20
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2016
Language eng
Formatted abstract
Pseudocapacitive storage of monovalent alkali cations, such as Li+ and Na+, is critically important for the development of metal-ion capacitors. Functional carbon materials decorated with ketone-containing groups are excellent candidates for this purpose. An epoxidation approach was deployed in this work to decorate electroactive oxygen groups on a high surface area nanoporous carbon with aligned mesopores. Because of the turbostratic structure, the intermediate epoxides dissipated into double-bonded oxygen groups in the functionalized carbon. The synergy of large porosity, good conductivity and enhanced surface redox activity endows the functionalized carbon cathode with high capacity (313 mA h/g@50 mA/g), good stability (>200 cycles) and high rate capability (148 mA h/g@400 mA/g).
Keyword Lithium-ion capacitors
Nanoporous carbons
Oxygen functional groups
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Published online 24 November 2015

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Chemistry and Molecular Biosciences
 
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