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| Description
| - Non-stable and hardly predictable power from renewable sources (e.g., solar or wind power plants) demands effective management on the power transmission level. Engineering development of new local energy storages as a part of the modern transmission network tailored to efficient and smart electricity distribution is vitally needed. Vanadium redox flow battery (VRFB), using vanadium ions in four different oxidation states (II, III, IV and V) in electrolytes, excels as the stationary energy storage in its sufficient capacity (kWh) proportional mainly to the electrolyte volume, long lifetime and high efficiency. In this work, the testing membrane cell of VRFB was continuously tested. The stable round-trip energy efficiency higher than 82 % at a current density of 100 mA/cm2 was achieved. The battery characteristics (i.e., efficiency and current density) are nowadays acceptable for the industrial utilization of the system. The development of the device for the electrolyte production is an integral part of the successful progress during the scale-up of the VRFB. The methodics for the electrolyte production is based on the reductive dissolution of the vanadium(V) oxide in diluted sulfuric acid. In this work, the design, the construction and the evaluation of several membrane flow electrolyzers are presented. Electrolyzers are tailored to the electrolyte preparation. The construction is provided in different geometries (i.e., planparallel and coaxial) and in different scales. The innovation in the new devices consists in the production capacity scale up (from approximately 200 ml/day to more than 10 l/day). Optimal operating conditions of both systems were determined by the load characteristics. Both systems were tested by galvanostatic electrolysis of the mixture of vanadium(V) oxide and diluted sulfuric acid at the same conditions. The electrolyte quality was monitored by the conductometry and visible and adjacent ultraviolet and infrared spectroscopy.
- Non-stable and hardly predictable power from renewable sources (e.g., solar or wind power plants) demands effective management on the power transmission level. Engineering development of new local energy storages as a part of the modern transmission network tailored to efficient and smart electricity distribution is vitally needed. Vanadium redox flow battery (VRFB), using vanadium ions in four different oxidation states (II, III, IV and V) in electrolytes, excels as the stationary energy storage in its sufficient capacity (kWh) proportional mainly to the electrolyte volume, long lifetime and high efficiency. In this work, the testing membrane cell of VRFB was continuously tested. The stable round-trip energy efficiency higher than 82 % at a current density of 100 mA/cm2 was achieved. The battery characteristics (i.e., efficiency and current density) are nowadays acceptable for the industrial utilization of the system. The development of the device for the electrolyte production is an integral part of the successful progress during the scale-up of the VRFB. The methodics for the electrolyte production is based on the reductive dissolution of the vanadium(V) oxide in diluted sulfuric acid. In this work, the design, the construction and the evaluation of several membrane flow electrolyzers are presented. Electrolyzers are tailored to the electrolyte preparation. The construction is provided in different geometries (i.e., planparallel and coaxial) and in different scales. The innovation in the new devices consists in the production capacity scale up (from approximately 200 ml/day to more than 10 l/day). Optimal operating conditions of both systems were determined by the load characteristics. Both systems were tested by galvanostatic electrolysis of the mixture of vanadium(V) oxide and diluted sulfuric acid at the same conditions. The electrolyte quality was monitored by the conductometry and visible and adjacent ultraviolet and infrared spectroscopy. (en)
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| Title
| - Membrane Electrolyzer for Vanadium Based Solutions
- Membrane Electrolyzer for Vanadium Based Solutions (en)
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| skos:prefLabel
| - Membrane Electrolyzer for Vanadium Based Solutions
- Membrane Electrolyzer for Vanadium Based Solutions (en)
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| skos:notation
| - RIV/60461373:22340/14:43897861!RIV15-MSM-22340___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/60461373:22340/14:43897861
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| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - scale-up; membrane electrolyzer; vanadium redox flow battery; Energy storage (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...v/mistoKonaniAkce
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| http://linked.open...i/riv/mistoVydani
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| http://linked.open...i/riv/nazevZdroje
| - Studentská odborná konference Chemie je život 2014
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Kosek, Juraj
- Pocedič, Jaromír
- Mazúr, Petr
- Dundálek, Jan
- Vrána, Jiří
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| http://linked.open...vavai/riv/typAkce
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| http://linked.open.../riv/zahajeniAkce
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| number of pages
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| http://purl.org/ne...btex#hasPublisher
| - Vysoké učení technické v Brně; Fakulta chemická
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| https://schema.org/isbn
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| http://localhost/t...ganizacniJednotka
| |
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