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"Organic mega flow battery promises breakthrough for renewable energy"
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Glenn
Jan 10, 2014, 11:42:01 AM1/10/14
to
(Svar til dk.teknik.energi )
Nu er der ikke langt til en CO2-neutral verden?
Denne flow-akkumulators v�ske er lavet af billig organisk materiale:
Harvard School of Engineering and Applied Sciences (2014, January 8).
Organic mega flow battery promises breakthrough for renewable energy.
ScienceDaily:
http://www.sciencedaily.com/releases/2014/01/140108154238.htm
Citat: "...
The paper reports a metal-free flow battery that relies on the
electrochemistry of naturally abundant, inexpensive, small organic
(carbon-based) molecules called quinones, which are similar to molecules
that store energy in plants and animals.
...
The new flow battery developed by the Harvard team already performs as
well as vanadium flow batteries, with chemicals that are significantly
less expensive, and with no precious metal electrocatalyst.
...
The quinones are dissolved in water, which prevents them from catching fire.
...
"So far, we've seen no sign of degradation after more than 100 cycles,
but commercial applications require thousands of cycles," he said.
...
"You could theoretically put this on any node on the grid," Aziz said
...
This technology could also provide very useful backup for off-grid
rooftop solar panels -- an important advantage considering some 20
percent of the world's population does not have access to a power
distribution network.
..."
/Glenn
Nu er der ikke langt til en CO2-neutral verden?
Denne flow-akkumulators v�ske er lavet af billig organisk materiale:
Harvard School of Engineering and Applied Sciences (2014, January 8).
Organic mega flow battery promises breakthrough for renewable energy.
ScienceDaily:
http://www.sciencedaily.com/releases/2014/01/140108154238.htm
Citat: "...
The paper reports a metal-free flow battery that relies on the
electrochemistry of naturally abundant, inexpensive, small organic
(carbon-based) molecules called quinones, which are similar to molecules
that store energy in plants and animals.
...
The new flow battery developed by the Harvard team already performs as
well as vanadium flow batteries, with chemicals that are significantly
less expensive, and with no precious metal electrocatalyst.
...
The quinones are dissolved in water, which prevents them from catching fire.
...
"So far, we've seen no sign of degradation after more than 100 cycles,
but commercial applications require thousands of cycles," he said.
...
"You could theoretically put this on any node on the grid," Aziz said
...
This technology could also provide very useful backup for off-grid
rooftop solar panels -- an important advantage considering some 20
percent of the world's population does not have access to a power
distribution network.
..."
/Glenn
Dieter Britz
Jan 11, 2014, 10:19:41 AM1/11/14
to
On Fri, 10 Jan 2014 17:42:01 +0100, Glenn wrote:
> (Svar til dk.teknik.energi )
>
> Nu er der ikke langt til en CO2-neutral verden?
>
> Denne flow-akkumulators væske er lavet af billig organisk materiale:
> (Svar til dk.teknik.energi )
>
> Nu er der ikke langt til en CO2-neutral verden?
>
[...]
Om det er CO2-neutral eller ej afhænger hvor den strøm, der
lagres i dette batteri, kommer fra. Batteriet selv skal kun
gemme den energi til senere brug. Det kunne godt nok komme
fra vindmøller eller solceller, som ja, er CO2-neutral. Lagring
af energi er et af problemer med disse.
Fordelen med flowbatterier, i modsætning til andre batterityper
er, at man kan have meget store mængde af reaktiv stof, som
pumpes igennem en elektrolytisk celle, så de kan optage ret store
mængder af energi ved en lavere pris.
--
Dieter Britz
Glenn
Jan 11, 2014, 3:14:04 PM1/11/14
to
Endnu en god grund til at anvende flow-akkumulatorer er, at de i
princippet kan gemme væskerne på dunke, uden at de mister energi i form
af selvafladningsstrøm.
Den lagrede energi kan i princippet gemmes fx et år.
/Glenn
Preben R. Sørensen
Jan 11, 2014, 4:45:30 PM1/11/14
to
"Glenn" <glen...@gmail.com> skrev
>
> Nu er der ikke langt til en CO2-neutral verden?
Sagde du overgang til tvangs-udslip af CO2? :-)
> Nu er der ikke langt til en CO2-neutral verden?
--
M.V.H.
Preben Riis S�rensen
pre...@esenet.dk
Klaus D. Mikkelsen
Jan 12, 2014, 4:30:55 AM1/12/14
to
Glenn skriver:
Eller rettere, hvor stor er spildprocenten ved hele processen?
Klaus
--
Modelbane Europas hjemmeside: http://www.modelbaneeuropa.dk
Min egen hjemmeside: http://www.moppe.dk
Forum om modeltog og tog i 1:1: http://www.baneforum.dk
>
> Den lagrede energi kan i princippet gemmes fx et år.
Og, hvor mange procent af den energi der tilf�res kan tr�kkes ud igen.
> Den lagrede energi kan i princippet gemmes fx et år.
Eller rettere, hvor stor er spildprocenten ved hele processen?
Klaus
--
Modelbane Europas hjemmeside: http://www.modelbaneeuropa.dk
Min egen hjemmeside: http://www.moppe.dk
Forum om modeltog og tog i 1:1: http://www.baneforum.dk
Glenn
Jan 12, 2014, 5:57:17 AM1/12/14
to
On 12/01/14 10.30, Klaus D. Mikkelsen wrote:
> Glenn skriver:
>>
>> Den lagrede energi kan i princippet gemmes fx et år.
> Glenn skriver:
>>
>
> Og, hvor mange procent af den energi der tilføres kan trækkes ud igen.
> Eller rettere, hvor stor er spildprocenten ved hele processen?
>
>
>
> Klaus
Hej Klaus
>
>
>
> Klaus
Kunne man ikke forestille sig, at elbiler (rettere flow-biler?) havde 4
væskeporte; to til brugt flow-væske og 2 til nyt flow-væske?
Dog skal der passes på brom, da det er giftigt:
https://da.wikipedia.org/wiki/Brom
-
8 January 2014, A metal-free organic–inorganic aqueous flow battery:
http://www.nature.com/nature/journal/v505/n7482/full/nature12909.html
Citat: "...
combining the quinone/hydroquinone couple with the Br2/Br− redox couple,
yields a peak galvanic power density exceeding 0.6 W cm^−2 at 1.3 A
cm^−2. Cycling of this quinone–bromide flow battery showed >99 per cent
storage capacity retention per cycle.
...
As the SOC increased from 10% to 90%, the open-circuit potential
increased linearly from 0.69 V to 0.92 V.
...
all-liquid flow batteries offers the following advantages over current
flow-battery technologies.
...
Fourth, solubility: AQDS has an aqueous solubility greater than 1 M at
pH 0, and the quinone solution can thus be stored at relatively high
energy density—volumetric and gravimetric energy densities exceed 50 W h
l−1 and 50 W h kg^−1, respectively.
...
Optimization of engineering and operating parameters such as the flow
field geometry, electrode design, membrane separator and
temperature—which have not yet even begun—should lead to significant
performance improvements in the future, as it has for vanadium flow
batteries, which took many years to reach the power densities we report
here6.
..."
Fra:
11. jan 2014, Nyt materiale kan sikre gennembrud for flowbatterier til
vindmøllestrøm.
Såkaldte flowbatterier kan lagre store energimængder. Nu kan de
fremstilles billigt:
http://ing.dk/artikel/nyt-materiale-kan-sikre-gennembrud-flowbatterier-til-vindmoellestroem-165504
Citat: "...
Forskerne estimerer de kemiske omkostninger pr. kilowatttime lagret
energi til 33 kr. for brom og 115 kr. for AQDS. Til sammenligning er den
tilsvarende pris ved vanadium på 445 kr. og omkring 2.500 kr. ved
lithium-ion-batterier.
..."
/Glenn
Glenn
Jan 12, 2014, 9:18:15 AM1/12/14
to
On 12/01/14 10.30, Klaus D. Mikkelsen wrote:
> Glenn skriver:
>>
>> Den lagrede energi kan i princippet gemmes fx et år.
>
> Og, hvor mange procent af den energi der tilf�res kan tr�kkes ud igen.
> Eller rettere, hvor stor er spildprocenten ved hele processen?
>
>
>
> Klaus
Hej Klaus
>
>
>
> Klaus
Jeg glemte at fremh�ve f�lgende:
8 January 2014, A metal-free organic�inorganic aqueous flow battery:
http://www.nature.com/nature/journal/v505/n7482/full/nature12909.html
Citat: "...
Cycling of this quinone�bromide flow battery showed >99 per cent storage
capacity retention per cycle.
..."
/Glenn
..."
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