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Journal of Materials Science: Materials in Electronics

In situ self-assembly of SiO2 coating Co3O4/graphene aerogel and its enhanced electrochemical performance for supercapacitors

  • 22-08-2019
Published in:
Authors
Xiaojing Yan
Xingyan Wang
Youzhi Dai
Yueying He
Zhibang Cai
You Wang
Xianyou Wang
Published in
Journal of Materials Science: Materials in Electronics | Issue 18/2019

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Abstract

The SiO2@Co3O4/GA composite with double-coating structure was successfully synthesized through an in situ self-assembly method. Microstructure measurements showed that the SiO2 film coating the Co3O4 and then anchored on the plicated GA together to realize coating again. In this preparation process can form more stable Si–O–Co so its performance has a marked improvement. This structure not only can improve the capacitance of GA but also can effectively reduce the large volumetric expansion and aggregation of Co3O4. The electrochemical performance were charactered by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS). The SiO2@Co3O4/GA exhibited a high capacitance of 620 F g−1 at the current of 1 A g−1 in 6 M KOH. After 1000 cycles, it displayed a good cycling ability of 94% capacitance retention. The excellent performance due to the interaction between SiO2 and Co3O4 in the in situ self-assembly preparation process. The joint effort make it more stable and sustainable. Its superior performance suggest that SiO2@Co3O4/GA has an tremendous potential in energy application.

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previous article Observation of enhanced humidity sensing performance and structure, dielectric, optical and DC conductivity studies of scandium doped cobalt chromate
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Title
In situ self-assembly of SiO2 coating Co3O4/graphene aerogel and its enhanced electrochemical performance for supercapacitors
Authors
Xiaojing Yan
Xingyan Wang
Youzhi Dai
Yueying He
Zhibang Cai
You Wang
Xianyou Wang
Publication date
22-08-2019
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 18/2019
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-019-02069-3
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