High Energy Density Aqueous Li‐Ion Flow Capacitor |
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| Authors: | Hao Liu Libing Liao Yi‐Chun Lu Quan Li |
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| Affiliation: | 1. School of Science, China University of Geosciences, Beijing, P. R. China;2. Department of Physics, Chinese University of Hong Kong, Hong Kong;3. Beijing Key Laboratory of Optical Detection Technology for Oil and Gas, China University of Petroleum, Beijing, P. R. China;4. School of Materials Science and Technology, China University of Geosciences, Beijing, P. R. China;5. Department of Mechanical and Automation Engineering, Chinese University of Hong Kong, Hong Kong |
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| Abstract: | High energy density Li‐ion hybrid flow capacitors are demonstrated by employing LiMn2O4 and activated carbon slurry electrodes. Compared to the existing aqueous flow electrochemical capacitors, the hybrid one exhibits much higher energy densities due to the introduction of high capacity Li‐insertion materials (e.g., LiMn2O4 in the present work) as the flowable electrode with asymmetrical cell configuration. A record energy density, i.e., 23.4 W h kg?1 at a power of 50.0 W kg?1 has been achieved for aqueous flow capacitors tested at static condition reported to date. A full operational Li‐ion flow capacitor tested in an intermittent‐flow mode has also been demonstrated. The Li‐ion hybrid flow capacitor shows great promise for high‐rate grid applications. |
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| Keywords: | energy density flow capacitors grid energy storage slurry electrodes |
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