Abstract
Sub-micron porous-hollow carbon spheres are synthesized from ground soybean waste via a facile and economical hydrothermal carbonization and high-temperature heat-treatment in different media. The sub-micron porous-hollow carbon spheres after the heat treatment with the flow of argon have an average size of 398 ± 10 nm and an average shell thickness of ∼40 nm. The carbon in the porous-hollow spheres is amorphous. The electrochemical analyses of the porous-hollow spheres reveal that the porous-hollow carbon spheres heat-treated with the flow of the mixture of N2 and H2O steam have good capacitive properties and high specific capacitances, and the porous-hollow carbon spheres heat-treated in an inert medium (N2 or Ar)possess relatively low capacitances with good rate capability. The results reported in this work likely provide a new and simple route for preparing functional materials with designed structures.
Original language | English |
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Pages (from-to) | 50-55 |
Number of pages | 6 |
Journal | Materials Today Energy |
Volume | 13 |
DOIs | |
State | Published - Sep 2019 |
Bibliographical note
Funding Information:This work is supported by the NSF through the grant CMMI-1634540 (FQY)monitored by Dr. Khershed Cooper, the grant CHE-1800316 (DSY)of Division of Chemistry, and the National Natural Science Foundation of China (No. 21805123)(WS).
Funding Information:
This work is supported by the NSF through the grant CMMI-1634540 (FQY) monitored by Dr. Khershed Cooper, the grant CHE-1800316 (DSY) of Division of Chemistry, and the National Natural Science Foundation of China (No. 21805123 ) (WS).
Publisher Copyright:
© 2019 Elsevier Ltd
Keywords
- Biomass waste
- Hollow-porous structure
- Template-free
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science (miscellaneous)
- Nuclear Energy and Engineering
- Fuel Technology
- Energy Engineering and Power Technology