Superhigh-rate capacitive performance of heteroatoms-doped double shell hollow carbon spheres

Cai, Tonghui, Xing, Wei, Liu, Zhen, Zeng, Jingbin, Xue, Qingzhong, Qiao, Shizhang and Yan, Zifeng (2015) Superhigh-rate capacitive performance of heteroatoms-doped double shell hollow carbon spheres. Carbon, 86 235-244. doi:10.1016/j.carbon.2015.01.032

Author Cai, Tonghui
Xing, Wei
Liu, Zhen
Zeng, Jingbin
Xue, Qingzhong
Qiao, Shizhang
Yan, Zifeng
Title Superhigh-rate capacitive performance of heteroatoms-doped double shell hollow carbon spheres
Journal name Carbon   Check publisher's open access policy
ISSN 0008-6223
Publication date 2015-05-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.carbon.2015.01.032
Volume 86
Start page 235
End page 244
Total pages 10
Place of publication Oxford United Kingdom
Publisher Pergamon Press
Collection year 2016
Language eng
Formatted abstract
The salient practical application feature of an ideal supercapacitor is its ability to deliver high energy density stably even at ultrahigh power density. Therefore, a rational design of electrode materials is essentially required for achieving high current, energy and power densities. In this work, a special “in situ replicating” strategy is employed to fabricate double shell hollow carbon spheres with homogeneously doped heteroatoms. The KOH activation introduces micropores to the thin shells of the hollow carbon spheres. Materials characterizations show that these carbon spheres have such merits as large surface area, easy-accessible micropore surface with faradaic reaction sites, and high conductivity. All these result in ultrafast ion transport from electrolyte to the micropores in the carbon spheres and endow the carbon with outstanding capacitive performance, e.g., an unprecedentedly high specific capacitance of 270 F g−1 at a very high current density of 90 A g−1. Moreover, a high energy density of 11.9 Wh kg−1 at a respectable power density of 30,000 W kg−1 is achieved in 6 M KOH electrolyte.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
Australian Institute for Bioengineering and Nanotechnology Publications
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Citation counts: TR Web of Science Citation Count  Cited 10 times in Thomson Reuters Web of Science Article | Citations
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