Processing of Onion-like Carbon for Electrochemical Capacitors [electronic resource]
Aqueous Dispersion; Onion-Like Carbon; Particle Size; Supercapacitors.
Saved in:
| Online Access: |
Online Access (via OSTI) |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. Office of Basic Energy Sciences ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2017.
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| Subjects: |
| Summary: | Aqueous Dispersion; Onion-Like Carbon; Particle Size; Supercapacitors. |
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| Abstract: | Multi-shell fullerenes known as onion-like carbon (OLC) are especially attractive in applications relative to energy storage, such as electrochemical capacitors, due to a near-spherical shape of particles, their nanoscale diameters and high conductivity leading to fast rate performance. Because of this, onion-like carbon can be fabricated into electrodes, used as a conductive additive, and may have potential in composites and additive manufacturing. However due to agglomeration of OLC particles, creating a stable, aqueous dispersion for ink production or formulating composites proves challenging. Also, we explore how attrition milling, acid treatment, and probe sonication can be employed to decrease agglomeration and provide colloidal stability in aqueous media. We also investigate how the electrochemical performance changes with each processing step as well as the treatments in succession. When tested in electrochemical capacitors, the processing increases the capacitance by a factor of three, due to an added pseudocapacitive contribution which is not present in untreated OLC. As a result, the processing of OLC proves to be advantageous for the production of stable, aqueous solutions, which also exhibit improved electrochemical properties suitable for functional inks, conductive additives, and fabrication of composite electrodes. |
| Item Description: | Published through SciTech Connect. 02/04/2017. "KC0307010" "ERKCC61" ECS Journal of Solid State Science and Technology 6 6 ISSN 2162-8769 AM. Katherine L. Van Aken; Kathleen Maleski; Tyler S. Mathis; James P. Breslin; Yury G. Gogotsi. |
| Physical Description: | p. M3103-M3108 : digital, PDF file. |