期刊
CERAMICS INTERNATIONAL
卷 45, 期 4, 页码 4208-4218出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.11.091
关键词
Dye-sensitized solar cell; Supercapacitor; Honeycomb-like porous structure; Counter electrode catalyst; Bio-based carbon electrode
资金
- NSFC [51672208]
- National Science & Technology Pillar Program [2012BAD47B02]
- Sci-Tech R&D Program of Shaanxi Province [2010K01-120, 2015JM5183]
- Shaanxi Provincial Department of Education [2013JK0927]
- SRF for ROCS, SEM
In this study, aloe peel-derived honeycomb-like porous carbons (AP-HC) are controllably prepared by combining simple hydrothermal carbonization with chemical activation. A morphology transformation from the spherical structure (AP-SC) to the honeycomb-like structure (AP-HC) is achieved for biomass-derived carbon materials and is accompanied by an increase in the specific surface area from 13 to 1286 m(2) g(-1) The AP-HC as a counter electrode (CE) for dye-sensitized solar cells (DSSCs) exhibits remarkable catalytic activity for I-3(-) ion reduction and a high power conversion efficiency (PCE) of 6.92% that matches the Pt-based DSSC's performance (7.19%). As a working electrode in supercapacitors (SCs), a high specific capacitance of 264 F g(-1) at 0.5 A g(-1) is achieved in a three-electrode system. Additionally, a high retention rate of similar to 77.45% (ranging from 0.5 to 30.0 A g(-1)) and superior cycling performance (91% capacitance retention after 5000 cycles) are also demonstrated. This study provides an efficient strategy for fabricating morphology-controllable porous bio-based carbon with higher specific surface area (1286 m(2) g(-1)) that exhibits significant potential for new energy devices.
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