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Prelomový objav prinesie elektromobily s trojnásobnou kapacitou batérie

Technológie
9

V poslednom čase vedci vidia veľký potenciál v batériách s obsahom lítia a síry ako ekologickejšom spôsobe napájania elektromobilov. Nespoliehajú sa totiž na drahé a ťažko dostupné suroviny, ako je napríklad kobalt. Doteraz však túto technológiu brzdili problémy súvisiace so stabilitou. Nedávno inžinieri z Drexelovej univerzity prišli si prelomovým objavom, ktorý podľa nich približuje tieto batérie ku komerčnému využitiu, a to využitím vzácnej chemickej fázy síry, ktorá zabraňuje škodlivým chemickým reakciám.

Lítiovo-sírové batérie sú veľkým prísľubom, pokiaľ ide o skladovanie energie, a to nielen preto, že síry je dostatok, ale môžu takisto ponúknuť výrazný nárast výkonu vďaka schopnosti uskladniť niekoľkokrát viac energie ako dnešné lítiovo-iónové batérie. Vedci však neustále narážajú na problém tvorby chemických zlúčenín nazývaných polysulfidy. Tie sa pri prevádzke batérie dostávajú do elektrolytu, kde vyvolávajú chemické reakcie, ktoré ohrozujú kapacitu a životnosť batérie.

Vedcom sa už podarilo vymeniť uhličitanový elektrolyt za éterový elektrolyt, ktorý s polysulfidmi nereaguje. To však prináša ďalšie problémy, pretože éterový elektrolyt je veľmi prchavý a obsahuje zložky s nízkym bodom varu, čo znamená, že batéria by mohla rýchlo zlyhať alebo sa roztaviť, keby sa zohriala nad izbovú teplotu. Chemickí inžinieri z Drexelovej univerzity pracujú na inom riešení. Začali návrhom novej katódy, ktorá môže pracovať s uhličitanovými elektrolytmi, ktoré sa už komerčne používajú.

Táto katóda je vyrobená z uhlíkových nanovlákien a už predtým sa ukázalo, že spomaľuje pohyb polysulfidov v éterovom elektrolyte. No bolo treba dosiahnuť, aby fungovala aj s uhličitanovým elektrolytom. Vedci sa pokúsili uväzniť síru v sieťke z uhlíkových nanovlákien, aby zabránili nebezpečným chemickým reakciám pomocou techniky nazývanej depozícia z pár. Nemalo to celkom želaný účinok, ale ukázalo sa, že síra sa vykryštalizovala neočakávaným spôsobom a zmenila sa na niečo, čo sa nazýva monoklinická (jednoklonná) gama fáza síry.

Je to mierne zmenená forma prvku, ktorá sa doteraz vyrábala len pri vysokých teplotách v laboratóriu alebo sa pozorovala v ropných vrtoch v prírode. Pre vedcov je výhodné, že nereaguje s uhličitanovým elektrolytom, čím sa odstránilo riziko tvorby polysulfidov. V predchádzajúcich výskumoch bola monoklinická síra nestabilná pri teplote do 95 °C. V niekoľkých starších štúdiách výskumníci vytvorili monoklinickú gama síru, ktorá bola stabilná maximálne 20 až 30 minút.

„My sme ju však vytvorili v katóde, ktorá prešla tisíckami cyklov nabíjania a vybíjania bez zníženia výkonu, a o rok neskôr naše skúmanie ukázalo, že chemická fáza zostala rovnaká,“ povedal Rahul Pai, spoluautor výskumu. Katóda zostala stabilná počas ročného testovania a po 4000 cykloch nabíjania a vybíjania, čo podľa vedcov zodpovedá 10 rokom bežného používania. Prototyp batérie, ktorý tím vyrobil, ponúkal trojnásobnú kapacitu v porovnaní so štandardnou lítiovo-iónovou batériou. Výskum bol uverejnený v časopise Nature Communications Chemistry.

Zdroj: newatlas.com.

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9 komentárov

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9.3.2022 11:03
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Qui xq S reakcia na: Prelomový objav prinesie elektromobily s trojnásobnou kapacitou batérie

26.2.2022 00:02
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Sez e reakcia na: Prelomový objav prinesie elektromobily s trojnásobnou kapacitou batérie

24.2.2022 09:02
Hey, my name’s Eric and for just a second, imagine this…

- Someone does a search and winds up at nextech.sk.

- They hang out for a minute to check it out. “I’m interested… but… maybe…”

- And then they hit the back button and check out the other search results instead.

- Bottom line – you got an eyeball, but nothing else to show for it.

- There they go.

This isn’t really your fault – it happens a LOT – studies show 7 out of 10 visitors to any site disappear without leaving a trace.

But you CAN fix that.

Talk With Web Visitor is a software widget that’s works on your site, ready to capture any visitor’s Name, Email address and Phone Number. It lets you know right then and there – enabling you to call that lead while they’re literally looking over your site.

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You have customers waiting to talk with you right now… don’t keep them waiting.
CLICK HERE https://jumboleadmagnet.com to try Talk With Web Visitor now.

If you'd like to unsubscribe click here http://jumboleadmagnet.com/unsubscribe.aspx?d=nextech.sk
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C ncywyj reakcia na: Prelomový objav prinesie elektromobily s trojnásobnou kapacitou batérie

23.2.2022 22:02
Cool website!

My name’s Eric, and I just found your site - nextech.sk - while surfing the net. You showed up at the top of the search results, so I checked you out. Looks like what you’re doing is pretty cool.

But if you don’t mind me asking – after someone like me stumbles across nextech.sk, what usually happens?

Is your site generating leads for your business?

I’m guessing some, but I also bet you’d like more… studies show that 7 out 10 who land on a site wind up leaving without a trace.

Not good.

Here’s a thought – what if there was an easy way for every visitor to “raise their hand” to get a phone call from you INSTANTLY… the second they hit your site and said, “call me now.”

You can –

Talk With Web Visitor is a software widget that’s works on your site, ready to capture any visitor’s Name, Email address and Phone Number. It lets you know IMMEDIATELY – so that you can talk to that lead while they’re literally looking over your site.

CLICK HERE https://jumboleadmagnet.com to try out a Live Demo with Talk With Web Visitor now to see exactly how it works.

Time is money when it comes to connecting with leads – the difference between contacting someone within 5 minutes versus 30 minutes later can be huge – like 100 times better!

That’s why we built out our new SMS Text With Lead feature… because once you’ve captured the visitor’s phone number, you can automatically start a text message (SMS) conversation.

Think about the possibilities – even if you don’t close a deal then and there, you can follow up with text messages for new offers, content links, even just “how you doing?” notes to build a relationship.

Wouldn’t that be cool?

CLICK HERE https://jumboleadmagnet.com to discover what Talk With Web Visitor can do for your business.

You could be converting up to 100X more leads today!
Eric

PS: Talk With Web Visitor offers a FREE 14 days trial – and it even includes International Long Distance Calling.
You have customers waiting to talk with you right now… don’t keep them waiting.
CLICK HERE https://jumboleadmagnet.com to try Talk With Web Visitor now.

If you'd like to unsubscribe click here http://jumboleadmagnet.com/unsubscribe.aspx?d=nextech.sk
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Cjfu giezcv reakcia na: Prelomový objav prinesie elektromobily s trojnásobnou kapacitou batérie

23.2.2022 00:02
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You could be converting up to 100X more leads today!

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PS: Talk With Web Visitor offers a FREE 14 days trial – and it even includes International Long Distance Calling.
You have customers waiting to talk with you right now… don’t keep them waiting.
CLICK HERE http://talkwithwebtraffic.com to try Talk With Web Visitor now.

If you'd like to unsubscribe click here http://talkwithwebtraffic.com/unsubscribe.aspx?d=nextech.sk
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Tých superbatrerii tu už bolo... reakcia na: Prelomový objav prinesie elektromobily s trojnásobnou kapacitou batérie

17.2.2022 23:02
Až uvidím v cenníku nejaké auto za cca 20 000€, dojazdom aspoň 500km a garanciou aspoň 1000 nabíjacích cyklov sa môžme začať baviť i super batérií.
Dovtedy sú to len keci.
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RE: Elektrická Dácia je za 14990€ reakcia na: Tých superbatrerii tu už bolo...

19.2.2022 18:02
Elektrická Dácia má byť za 14990€ Je podľa mňa drahá ako sviňa. To mi stačí benzíňák Dácia za 5990€. No alebo pôjdem pešo, busom. Elektrická šokodvka stojí 80000€ :D
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Uz znova reakcia na: Prelomový objav prinesie elektromobily s trojnásobnou kapacitou batérie

15.2.2022 22:02
super baterky? To vazne?
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RE: Teraz to uz su super baterky, mejd in India :) reakcia na: Uz znova

17.2.2022 17:02
Neveris? Vyskusaj. Super buper baterky. A vmysleli ich zasa raz Indovia, len na ten Mesiac sa nevedia so sondou trafit, ale baterky maju super buper. Tak co ty na to? Veris im? :D
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