Journal article
Composite Manganese Oxide Percolating Networks As a Suspension Electrode for an Asymmetric Flow Capacitor
ACS applied materials & interfaces, v 6(11), pp 8886-8893
11 Jun 2014
PMID: 24758221
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In this study, we examine the use of a percolating network of metal oxide (MnO2) as the active material in a suspension electrode as a way to increase the capacitance and energy density of an electrochemical flow capacitor. Amorphous manganese oxide was synthesized via a low-temperature hydrothermal approach and combined with carbon black to form composite flowable electrodes of different compositions. All suspension electrodes were tested in static configurations and consisted of an active solid material (MnO2 or activated carbon) immersed in aqueous neutral electrolyte (1 M Na2SO4). Increasing concentrations of carbon black led to better rate performance but at the cost of capacitance and viscosity. Furthermore, it was shown that an expanded voltage window of 1.6 V could be achieved when combining a composite MnO2-carbon black (cathode) and an activated carbon suspension (anode) in a charge balanced asymmetric device. The expansion of the voltage window led to a significant increase in the energy density to ∼11 Wh kg–1 at a power density of ∼50 W kg–1. These values are ∼3.5 times and ∼2 times better than a symmetric suspension electrode based on activated carbon.
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Details
- Title
- Composite Manganese Oxide Percolating Networks As a Suspension Electrode for an Asymmetric Flow Capacitor
- Creators
- Kelsey B Hatzell - Drexel UniversityLei Fan - Drexel UniversityMajid Beidaghi - Drexel UniversityMuhammad Boota - Drexel UniversityEkaterina Pomerantseva - Drexel UniversityEmin C Kumbur - Drexel UniversityYury Gogotsi - Drexel University
- Publication Details
- ACS applied materials & interfaces, v 6(11), pp 8886-8893
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000337336900111
- Scopus ID
- 2-s2.0-84902440319
- Other Identifier
- 991014877719804721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology