Name: a protocol for electrochemical evaluations and state of charge diagnostics of a symmetric organic redox flow battery
Uploaded: 2017-02-13T12:30:00
Description: Watch this Scientific Journal Video about A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery at JoVE.com

Dette arbejde blev støttet af Joint Center for Energy Storage Research (JCESR), en Energy Innovation Hub finansieret af det amerikanske Department of Energy, Kontoret for Videnskab, Basic Energi Videnskaber. Forfatterne også erkende Tidende Materialekemi A (en Royal Society of Chemistry tidsskrift) for oprindeligt at offentliggøre denne forskning ( <a href="http://pubs.rsc.org/en/content/articlehtml/2016/ta/c6ta01177b">http://pubs.rsc.org/en/content/articlehtml/2016/ta/c6ta01177b</a> ). PNNL er en multi-program nationale laboratorium drives af Battelle for DOE under kontrakt DE-AC05-76RL01830.

Bemærk: Alle opløsningspræparater, cyklisk voltammetri (CV) tests, og flow cellekonstruktion og forsøg blev udført i et argon-fyldt handskekasse med vand og O 2 niveauer mindre end 1 ppm. 1. Elektrokemisk Evalueringer af PTIO flowceller <ol><li> CV Test <ol><li> Polere en glasagtig kulstof elektrode med 0,05 um gamma alumina pulver, skylle det med deioniseret vand, sætte det i under vakuum ved stuetemperatur natten, og overføre det til en handskerummet. <...

<ol>
	<li>Dunn, B., Kamath, H., Tarascon, J. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Electrical+Energy+Storage+for+the+Grid:+A+Battery+of+Choices.">Electrical Energy Storage for the Grid: A Battery of Choices.</a> Science. 334 (6058), 928-935 (2011).</li><li>Yang, Z. G., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Electrochemical+Energy+Storage+for+Green+Grid.">Electrochemical Energy Storage for Green Grid.</a> Chem. Rev. 111 (5), 3577-3613 (2011).</li><li>Wang, W., Luo, Q., Li, B., Wei, X., Li, L., Yang, Z. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Recent+Progress+in+Redox+Flow+Battery+Research+and+Development.">Recent Progress in Redox Flow Battery Research and Development.</a> Adv. Funct. Mater. 23 (8), 970-986 (2013).</li><li>Skyllas-Kazacos, M., Chakrabarti, M. H., Hajimolana, S. A., Mjalli, F. S., Saleem, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Progress+in+Flow+Battery+Research+and+Development.">Progress in Flow Battery Research and Development.</a> J. Electrochem. Soc. 158 (5), 55-79 (2011).</li><li>Weber, A. Z., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Redox+Flow+Batteries:+A+Review.">Redox Flow Batteries: A Review.</a> J. Appl. Electrochem. 41 (10), 1137-1164 (2011).</li><li>Noack, J., Roznyatovskaya, N., Herr, T., Fischer, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+Chemistry+of+Redox-Flow+Batteries.">The Chemistry of Redox-Flow Batteries.</a> Angew. Chem. Int. Ed. 54 (34), 9775-9808 (2015).</li><li>Soloveichik, G. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Flow+Batteries:+Current+Status+and+Trends.">Flow Batteries: Current Status and Trends.</a> Chem. Rev. 115 (20), 11533-11558 (2015).</li><li>Leung, P., Li, X., de Leon, C. P., Berlouis, L., Low, C. T. J., Walsh, F. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Progress+in+Redox+Flow+Batteries,+Remaining+Challenges+and+Their+Applications+in+Energy+Storage.">Progress in Redox Flow Batteries, Remaining Challenges and Their Applications in Energy Storage.</a> RSC Adv. 2 (27), 10125-10156 (2012).</li><li>Gong, K., Fang, Q., Gu, S., Li, S., Yan, Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Nonaqueous+Redox-Flow+Batteries:+Organic+Solvents,+Supporting+Electrolytes,+and+Redox+Pairs.">Nonaqueous Redox-Flow Batteries: Organic Solvents, Supporting Electrolytes, and Redox Pairs.</a> Energy Environ. Sci. 8 (12), 3515-3530 (2015).</li><li>Shin, S. H., Yun, S. H., Moon, S. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+Review+of+Current+Developments+in+Non-aqueous+Redox+Flow+Batteries:+Characterization+of+Their+Membranes+for+Design+Perspective.">A Review of Current Developments in Non-aqueous Redox Flow Batteries: Characterization of Their Membranes for Design Perspective.</a> RSC Adv. 3 (24), 9095-9116 (2013).</li><li>Cappillino, P. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Application+of+Redox+Non-Innocent+Ligands+to+Non-Aqueous+Flow+Battery+Electrolytes.">Application of Redox Non-Innocent Ligands to Non-Aqueous Flow Battery Electrolytes.</a> Adv. Energy Mater. 4 (1), 1300566 (2014).</li><li>Suttil, J. A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Metal+Acetylacetonate+Complexes+for+High+Energy+Density+Non-aqueous+Redox+Flow+Batteries.">Metal Acetylacetonate Complexes for High Energy Density Non-aqueous Redox Flow Batteries.</a> J. Mater. Chem. A. 3 (15), 7929-7938 (2015).</li><li>Brushett, F. R., Vaughey, J. T., Jansen, A. N. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=An+All-Organic+Non-aqueous+Lithium-Ion+Redox+Flow+Battery.">An All-Organic Non-aqueous Lithium-Ion Redox Flow Battery.</a> Adv. Energy Mater. 2 (11), 1390-1396 (2012).</li><li>Wei, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Radical+Compatibility+with+Nonaqueous+Electrolytes+and+Its+Impact+on+an+All-Organic+Redox+Flow+Battery.">Radical Compatibility with Nonaqueous Electrolytes and Its Impact on an All-Organic Redox Flow Battery.</a> Angew. Chem. Int. Ed. 54 (30), 8684-8687 (2015).</li><li>Nagarjuna, G., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Impact+of+Redox-Active+Polymer+Molecular+Weight+on+the+Electrochemical+Properties+and+Transport+Across+Porous+Separators+in+Nonaqueous+Solvents.">Impact of Redox-Active Polymer Molecular Weight on the Electrochemical Properties and Transport Across Porous Separators in Nonaqueous Solvents.</a> J. Am. Chem. Soc. 136 (46), 16309-16316 (2014).</li><li>Wei, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=TEMPO-Based+Catholyte+for+High-Energy+Density+Nonaqueous+Redox+Flow+Batteries.">TEMPO-Based Catholyte for High-Energy Density Nonaqueous Redox Flow Batteries.</a> Adv. Mater. 26 (45), 7649-7653 (2014).</li><li>Wei, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Towards+High-Performance+Nonaqueous+Redox+Flow+Electrolyte+Via+Ionic+Modification+of+Active+Species.">Towards High-Performance Nonaqueous Redox Flow Electrolyte Via Ionic Modification of Active Species.</a> Adv. Energy Mater. 5 (1), 1400678 (2015).</li><li>Fan, F. Y., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Polysulfide+Flow+Batteries+Enabled+by+Percolating+Nanoscale+Conductor+Networks.">Polysulfide Flow Batteries Enabled by Percolating Nanoscale Conductor Networks.</a> Nano Lett. 14 (4), 2210-2218 (2014).</li><li>Pan, H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=On+the+Way+Toward+Understanding+Solution+Chemistry+of+Lithium+Polysulfides+for+High+Energy+Li-S+Redox+Flow+Batteries.">On the Way Toward Understanding Solution Chemistry of Lithium Polysulfides for High Energy Li-S Redox Flow Batteries.</a> Adv. Energy Mater. 5 (16), 1500113 (2015).</li><li>Escalante-Garcia, I. L., Wainright, J. S., Thompson, L. T., Savinell, R. F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Performance+of+a+Non-Aqueous+Vanadium+Acetylacetonate+Prototype+Redox+Flow+Battery:+Examination+of+Separators+and+Capacity+Decay.">Performance of a Non-Aqueous Vanadium Acetylacetonate Prototype Redox Flow Battery: Examination of Separators and Capacity Decay.</a> J. Electrochem. Soc. 162 (3), 363-372 (2015).</li><li>Wei, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Microporous+Separators+for+Fe/V+Redox+Flow+Batteries.">Microporous Separators for Fe/V Redox Flow Batteries.</a> J. Power Sources. 218, 39-45 (2012).</li><li>Skyllas-Kazacos, M., Kazacos, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=State+of+Charge+Monitoring+Methods+for+Vanadium+Redox+Flow+Battery+Control.">State of Charge Monitoring Methods for Vanadium Redox Flow Battery Control.</a> J. Power Sources. 196 (20), 8822-8827 (2011).</li><li>Brooker, R. P., Bell, C. J., Bonville, L. J., Kunz, H. R., Fenton, J. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Determining+Vanadium+Concentrations+Using+the+UV-Vis+Response+Method.">Determining Vanadium Concentrations Using the UV-Vis Response Method.</a> J. Electrochem. Soc. 162 (4), 608-613 (2015).</li><li>Petchsingh, C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Spectroscopic+Measurement+of+State+of+Charge+in+Vanadium+Flow+Batteries+with+an+Analytical+Model+of+VIV-VV+Absorbance.">Spectroscopic Measurement of State of Charge in Vanadium Flow Batteries with an Analytical Model of VIV-VV Absorbance.</a> J. Electrochem. Soc. 163 (1), 5068-5083 (2016).</li><li>Duan, W., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+Symmetric+Organic-Based+Nonaqueous+Redox+Flow+Battery+and+Its+State+of+Charge+Diagnostics+by+FTIR.">A Symmetric Organic-Based Nonaqueous Redox Flow Battery and Its State of Charge Diagnostics by FTIR.</a> J. Mater. Chem. A. 4 (15), 5448-5456 (2016).</li><li>Potash, R. A., McKone, J. R., Conte, S., Abru&#241;a, H. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=On+the+Benefits+of+a+Symmetric+Redox+Flow+Battery.">On the Benefits of a Symmetric Redox Flow Battery.</a> J. Electrochem. Soc. 163 (3), 338-344 (2016).</li><li>Kim, H. S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+Tetradentate+Ni(II)+Complex+Cation+as+a+Single+Redox+Couple+for+Non-aqueous+Flow+Batteries.">A Tetradentate Ni(II) Complex Cation as a Single Redox Couple for Non-aqueous Flow Batteries.</a> J. Power Sources. 283, 300-304 (2015).</li><li>Shinkle, A. A., Sleightholme, A. E. S., Griffith, L. D., Thompson, L. T., Monroe, C. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Degradation+Mechanisms+in+The+Non-aqueous+Vanadium+Acetylacetonate+Redox+Flow+Battery.">Degradation Mechanisms in The Non-aqueous Vanadium Acetylacetonate Redox Flow Battery.</a> J. Power Sources. 206, 490-496 (2012).</li><li>Li, Z., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Electrochemical+Properties+of+an+All-Organic+Redox+Flow+Battery+Using+2,2,6,6-Tetramethyl-1-Piperidinyloxy+and+N-Methylphthalimide.">Electrochemical Properties of an All-Organic Redox Flow Battery Using 2,2,6,6-Tetramethyl-1-Piperidinyloxy and N-Methylphthalimide.</a> Electrochem. Solid-State Lett. 14 (12), 171-173 (2011).</li><li>Schaltin, S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Towards+an+All-Copper+Redox+Flow+Battery+Based+on+a+Copper-Containing+Ionic+Liquid.">Towards an All-Copper Redox Flow Battery Based on a Copper-Containing Ionic Liquid.</a> Chem. Commun. 52, 414-417 (2016).</li><li>Luo, Q., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Capacity+Decay+and+Remediation+of+Nafion-based+All-Vanadium+Redox+Flow+Batteries.">Capacity Decay and Remediation of Nafion-based All-Vanadium Redox Flow Batteries.</a> ChemSusChem. 6 (2), 268-274 (2013).</li></ol>

Som vi demonstreret før, 25 FTIR er i stand til ikke-invasivt at detektere SOC af PTIO flow batteri. Som et diagnostisk værktøj, FTIR er særlig fordelagtig på grund af dens lette tilgængelighed, hurtig respons, lave omkostninger, lille pladsbehov, facilitet for online inkorporering, ingen detektor mætning, og evnen til at korrelere strukturel information til at undersøge molekylære udviklinger under flow batteridrift. Figur 3e illustrerer en foreslået flow batteri enhed...

Redox flow batterier lagre energi i flydende elektrolytter, der er indeholdt i eksterne reservoirer og pumpes til interne elektroder til at fuldføre elektrokemiske reaktioner. Den lagrede energi og kraft kan således afkoblet fører til fremragende design fleksibilitet, skalerbarhed og modularitet. Disse fordele gør flow batterier velegnet til stationære energilagring applikationer til at integrere rene endnu intermitterende vedvarende energikilder, øge gitter udnyttelse af aktiver og effektivitet, og forbedre energi elasticitet og sikkerhed. 1, 2, 3 Traditionelle vandige flow batterier lider begrænset energitæthed, hovedsagelig på grund af den smalle spænding vinduet for at undgå vand elektrolyse. 4, 5, 6, 7, 8 Derimod ikke-aqueskellige elektrolytter baseret flow batterier bliver bredt forfølges på grund af risikoen for at opnå høj celle spænding og høj energitæthed. 9, 10 I disse bestræbelser har en bred vifte af flow batteri kemier blevet undersøgt, herunder af metal-koordinering komplekser, 11, 12 all-økologiske, 13, 14 redox aktive polymerer, 15 og lithium hybrid flow-systemer. 16, 17, 18, 19 Men potentialet i ikke-vandige flow batterier er endnu ikke fuldt demonstreret på grund af den større teknisk flaskehals af begrænset demonstration under flow batteri-relevant forhold. Denne flaskehals er tæt forbundet med en række præstationsfremmende begrænsende faktorer. Først,den lille opløselighed fleste elektroaktive materialer fører til energitæthed levering lavt af ikke-vandige flow celler. Sekund, hastigheden evne af ikke-vandige flow batterier stort set begrænset af den høje elektrolyt viskositet og resistivitet ved relevante redox koncentrationer. Den tredje faktor er manglen på højtydende membraner. Nafion og keramiske membraner viser lav ionisk ledningsevne med ikke-vandige elektrolytter. Porøse separatorer har vist ordentlig flowcelle ydeevne, men lider betydelig selvafladning på grund af forholdsvis stor porestørrelse. 14, 20 Typisk blandet reaktant elektrolytter indeholdende både anolyt- og katolyt redox materialer: er (1 1 ratio) anvendes til at reducere redox materialer crossover, som imidlertid ofrer de effektive redox koncentrationer, typisk det halve. 14, 21 Overvinde den førnævnte flaskehals kræver forbedringer i materIALS opdagelse, batteri kemi design, og flow-celle-arkitektur for at opnå batteri-relevant cykling. Batteristatus overvågning er væsentlige vigtigt for pålidelig drift. Off-normale betingelser, herunder overprisen, gasudvikling, og materiale nedbrydning kan forårsage skader på batteriets ydeevne og endda batteri fiasko. Især for store flow batterier, der involverer store mængder batteri materialer, kan disse faktorer forårsage alvorlige sikkerhedsproblemer og investeringer tab. Ladetilstand (SOC), der beskriver dybden af ​​ladning eller afladning af flow batterier er en af ​​de vigtigste batteri status parametre. Rettidig SOC overvågning kan afsløre potentielle risici, før de når truende niveauer. dette område synes dog at være under-rettet hidtil, især i ikke-vandige flow batterier. Spectrophotoscopic metoder såsom ultraviolet-synligt (UV-vis) spektroskopi og elektrolyt ledningsevne målinger er blevet evalueret i vandig flow batt<html> ry for SOC bestemmelse. 22, 23, 24 Vi har for nylig indført et hidtil ukendt symmetrisk ikke-vandig flow batteri design baseret på en ny ambipolar redox materiale, 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxy-3-oxid (PTIO). 25 Dette flow batteri holder løftet om at løse de ovennævnte udfordringer i ikke-vandige flow batterier. Først PTIO har en høj opløselighed (2,6 M) i batteriet opløsningsmiddel af acetonitril (MeCN), der er lovende for at muliggøre en høj energitæthed. For det andet, PTIO udviser to reversible redox-par, der er moderat adskilt og således kan danne en symmetrisk batteri kemi i sig selv. Vi har også påvist, at en skelnelig PTIO top i FTIR spektre kan korreleres med koncentrationen af ​​uomsat PTIO i flowcellen, hvilket fører til spektroskopiske bestemmelse af SOC, som krydsvalideret af ESR resultater.lass = &quot;xref&quot;&gt; 26 Her præsenterer vi en protokol til at udarbejde procedurer for elektrokemiske evalueringer og FTIR-baserede SOC diagnostik af PTIO symmetrisk flow batteri. Dette arbejde forventes at udløse mere indsigt i at opretholde sikkerhed og pålidelighed under langsigtede flow batteri operationer, især i den virkelige verden gitter applikationer.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>PTIO</td>
			<td>TCI America</td>
			<td>A5440</td>
			<td>&#62;98.0%</td>
		</tr>
		<tr>
			<td>Tetrabutylammonium hexafluorophosphate</td>
			<td>Sigma-Aldrich</td>
			<td>86879</td>
			<td>electrochemical grade, &#8805;99.0%</td>
		</tr>
		<tr>
			<td>MeCN</td>
			<td>BASF</td>
			<td>50325685</td>
			<td>Battery grade</td>
		</tr>
		<tr>
			<td>Silver nitrate</td>
			<td>Sigma-Aldrich</td>
			<td>204390</td>
			<td>99.9999% trace metals basis</td>
		</tr>
		<tr>
			<td>Gamma alumina powder</td>
			<td>CH Instruments</td>
			<td>CHI120</td>
			<td></td>
		</tr>
		<tr>
			<td>Graphite felt</td>
			<td>SGL</td>
			<td>GFD3</td>
			<td>Vacuum-dry at 70&#176;C for 24 h</td>
		</tr>
		<tr>
			<td>Porous separator</td>
			<td>Daramic</td>
			<td>AA800</td>
			<td>Vacuum-dry at 70&#176;C for 24 h</td>
		</tr>
		<tr>
			<td>Battery Tester</td>
			<td>Wuhan LAND electronics Co., Ltd.</td>
			<td>Lanhe</td>
			<td>1A current range</td>
		</tr>
		<tr>
			<td>Electrochemical Workstation</td>
			<td>Solartron Analytical</td>
			<td>ModuLab</td>
			<td></td>
		</tr>
		<tr>
			<td>glove box</td>
			<td>MBRAUN</td>
			<td>Labmaster SP</td>
			<td>oxygen and water levels &#60;1 ppm</td>
		</tr>
		<tr>
			<td>ESR spectrometer</td>
			<td>Bruker&#160;</td>
			<td>Elexsys 580&#160;</td>
			<td>Equipped with an SHQE resonator with microwave frequency ~9.85 GHz (X band) at 2 mW power, with 100 kHz field modulation</td>
		</tr>
	</tbody>
</table>

a protocol for electrochemical evaluations and state of charge diagnostics of a symmetric organic redox flow battery

Redox flow batterier er blevet betragtet som en af ​​de mest lovende stationære energilagring løsninger til at forbedre pålideligheden af ​​elnettet og udbredelse af vedvarende energiteknologier. Blandt de mange flow batteri-kemi, ikke-vandige flow batterier har potentiale til at opnå høj energitæthed på grund af de brede spænding vinduer på ikke-vandige elektrolytter. Der er dog betydelige tekniske forhindringer i øjeblikket begrænser ikke-vandige flow batterier til at demonstrere deres fulde potentiale, såsom lave redox koncentrationer, lave driftsomkostninger strømme, under-udforsket batteristatus overvågning, etc. I et forsøg på at løse disse begrænsninger, vi for nylig rapporteret en ikke-vandig flow batteri baseret på en højt opløselig, redox-aktiv organisk nitronyl nitroxid radikal forbindelse, 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxy-3-oxid (PTIO). Denne redox materiale udviser en ambipolar elektrokemisk ejendom, og derfor kan tjene som både anolyte og katolyt redox materialer til at danne en symmetrisk flow batteri kemi. Endvidere demonstrerede vi, at Fourier transform infrarød (FTIR) spektroskopi kunne måle PTIO koncentrationer under PTIO flow batteri cykling og tilbyder rimeligt nøjagtig detektion af batteriet ladetilstand (SOC), som krydsvalideret ved elektronmikroskopi (ESR) målinger . Heri præsenterer vi en video-protokol til elektrokemisk evaluering og SOC diagnose af PTIO symmetrisk flow batteri. En detaljeret beskrivelse, vi eksperimentelt demonstreret ruten at opnå disse formål. Denne protokol har til formål at sætte gang i flere interesser og indsigt på sikkerhed og pålidelighed inden for ikke-vandige redox flow batterier.

De unikke fordele ved den symmetriske PTIO flow batterisystem er stærkt tilskrives de elektrokemiske egenskaber af PTIO, en organisk nitroxid radikal forbindelse. PTIO kan undergå elektrokemiske disproportioneringsprodukter reaktioner til dannelse PTIO + og PTIO - (figur 2a). Disse to redox-par er moderat adskilt af en spænding afstand på ~ 1,7 V (figur 2b) og kan anvendes som både anolyt- og katolyt redox materialer i en symme...

Watch this Scientific Journal Video about A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery at JoVE.com

A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery

Vi præsenterer de protokoller for elektrokemisk evaluering af en symmetrisk ikke-vandigt organisk redox flow batteri og til diagnosticering sin ladetilstand ved hjælp FTIR.

En protokol til elektrokemiske Evalueringer og Staten Charge Diagnostik af en symmetrisk Økologisk Redox Flow Batteri

Redox flow batteries have been considered as one of the most promising stationary energy storage solutions for improving the reliability of the power grid ...

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