sodium-ion battery CNRS

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raymon
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sodium-ion battery CNRS




by raymon » 30/11/15, 09:33

It is simply an effect of ad or something really interesting?
https://lejournal.cnrs.fr/articles/batt ... -en-marche
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by Remundo » 30/11/15, 13:07

and why not 2?

To summarize, the Na-ion batteries largely repeat the principle of intercalation of Li + cations in graphite or metal oxide matrices.

However, the number of cycles before a loss of performance has been very disappointing so far. (<100)
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by raymon » 30/11/15, 13:26

However, the number of cycles before a loss of performance has been very disappointing so far. (<100)

Here they talk about 2000 cycles.
CEA laboratory associated with the development of the prototype, while its life (maximum number of charge and discharge cycles) exceeds 2 000 cycles. The first very encouraging results, therefore, especially as they are still perfectible.
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by Obamot » 01/12/15, 00:26

Remundo wrote:and why not 2?

To summarize, the Na-ion batteries largely repeat the principle of intercalation of Li + cations in graphite or metal oxide matrices.

However, the number of cycles before a loss of performance has been very disappointing so far. (<100)

Hi Remundo,
Perhaps is it possible for you to answer this question choppy me to capacity for the propulsion of a vehicle, there's there a chance to make surpercondo graphene with a dielectric that their allows to race against performance batteries Li-on ... (I mean how to solve this very low breakdown voltage problem ...)
Since it seems that it's their weak spot now.

And if so how you see that what you know? (What avenues to solve this problem ...)
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by izentrop » 08/01/16, 13:50

Obamot wrote:for the capacity to propel a vehicle, there's there a chance to make surpercondo graphene with a dielectric that allows them to race against performance batteries Li-on ...
Hello, what will be important in the future for electric vehicles will:
the price / energy density / power density / resources (goes with the price).

"Our battery has an energy density - the amount of electricity that can be stored per kg of battery - 90 of Wh / kg. It can be charged and discharged quickly (one hour) and its life - after which its capacity is more than 80% of its original capacity - exceeds 2000 charge-discharge cycles. It is an operational battery. Its energy density can progress further, to perhaps 130-140 Wh / kg, but will remain below the best Li-ion batteries, which reach 200 Wh / kg" http://www.usinenouvelle.com/article/po ... de.N372152

"An exceptional energy density 391,7 Wh / kg is obtained for the supercapacitor based on GMM foam, which is much higher than for an electrochemical supercapacitor based foam GM only (39,72 Wh / kg). A high specific capacity (1108,79 F / g) and an exceptional power density 799,84 kW / kg are also achieved. In addition, the high retention capacity (97,94%) after 13 000 charge-discharge cycles demonstrates the high stability of the electrodes of the supercapacitor. " http://www.supercondensateur.com/recher ... ide392WHKG
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by Surivai » 08/01/16, 23:27

Obamot Hi!

Apparently you insist with your graphene problem and dielectric.
I thought our discussion on the following post had you convinced:
https://www.econologie.com/forums/micro-supe ... 14247.html

But that's good because supercondensateur.com just released an article explaining that a supercapacitor is not a capacitor (it is a kind of capacitor)
http://www.supercondensateur.com/non-un ... ndensateur

So forget your dielectric problem with graphene. This problem would exist if we attempted to make a capacitor with a graphene sheet as reinforcement. But a supercapacitor does not work like that.
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A large file to learn all about supercapacitors: http://www.supercondensateur.com/dossie ... densateurs
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by Obamot » 09/01/16, 09:46

Image

For the rehearsal, I'm in [MODE: "learning"] a bit like asking Canton how to say "Temple"in Chinese and I am answered" 寺廟 ", then the next move in a city I say (with my"Chinese inimitable"that nobody understands ^^)"that to be 寺廟, that to be a temple ", and I am politely told in Mandarin "no this is a 寶塔 pagoda"! Image Image it makes me laugh, but yes I have trouble ...
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by Surivai » 09/01/16, 09:54

No problem,

If you have other questions or misunderstandings, do not hesitate to know ...
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A large file to learn all about supercapacitors: http://www.supercondensateur.com/dossie ... densateurs

 


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