Pali kupita patsogolo kwaukadaulo wa batri wa Li-S: kuposa 99%. mphamvu pambuyo 200 m'zinthu

Asayansi ochokera ku yunivesite ya Melbourne (Australia) adalengeza kupita patsogolo kwaukadaulo wokhazikika wa lithiamu-sulfure (Li-S). Adatha kupanga ma cell omwe amakhalabe oposa 99 peresenti ya mphamvu zawo pambuyo pa 200 kuzungulira ndipo amapereka mphamvu zambiri kuposa maselo a lithiamu-ion kulemera komweko.

Zinthu za Li-S - pali mavuto, pali mayankho

Lingaliro la kugwiritsa ntchito sulfure m'maselo si lachilendo: Mabatire a Li-S adagwiritsidwa ntchito kale mu 2008 pa Zephyr-6, yomwe inaphwanya mbiri yowuluka popanda kutera. Ikhoza kukhala mlengalenga kwa masiku pafupifupi 3,5 chifukwa cha mabatire a lithiamu-sulfure opepuka omwe amayendetsa injiniyo ndipo amaperekedwa ndi maselo a photovoltaic (gwero).

Komabe, ma cell a Li-S ali ndi vuto limodzi lalikulu: kupirira mpaka makumi angapo a kachitidwe ntchitoChifukwa pamene cathode yopangidwa ndi sulfure imakulitsa voliyumu yake ndi pafupifupi 78 peresenti (!), Zomwe zimaposa 8 graphite m'maselo a lithiamu-ion. Kutupa kwa cathode kumapangitsa kuti iphwanyike ndikusungunula sulfure mu electrolyte.

Ndipo ang'onoang'ono kukula kwa cathode, ang'onoang'ono mphamvu ya selo lonse - kuwonongeka kumachitika nthawi yomweyo.

> Kodi galimoto yamagetsi iyenera kukhala nthawi yayitali bwanji? Kodi batire ya wopanga magetsi imalowetsa zaka zingati? [TIDZAYANKHA]

Asayansi aku Melbourne adaganiza zomata mamolekyu a sulfure pamodzi ndi polima, koma adawapatsa malo ochulukirapo kuposa kale. Gawo la zomangira zolimba zidasinthidwa ndi milatho yosinthika ya polima, yomwe idapangitsa kuti zitheke kukana chiwonongeko ndi kusintha kwa voliyumu - milatho imamatira zinthu za cathode ngati mphira:

Milatho ya polima yolumikiza mapangidwe a mamolekyu a sulfure (c) University of Melbourne

Maselo okhala ndi ma cathodes otsogola otere amakhala abwino kwambiri. adatha kusunga 99 peresenti ya mphamvu zawo zoyambirira pambuyo pa maulendo opitilira 200 (gwero). Ndipo adasunga mwayi waukulu wa sulfure: amasunga mphamvu zochulukirapo ka 5 pa voliyumu iliyonse kuposa ma cell a lithiamu-ion.

Minuses? Kulipira ndi kutulutsa kunachitika pa mphamvu ya 0,1 C (0,1 x mphamvu), pambuyo pa mizungu 200, ngakhale njira zabwino kwambiri zatsikira ku 80 peresenti ya kuthekera kwawo koyambirira. Komanso, ponyamula katundu wambiri (0,5C charge / discharge), ma cell adataya 20 peresenti ya mphamvu zawo patatha khumi ndi awiri, kungopitilira ma 100 amalipira kwambiri.

Pali kupita patsogolo kwaukadaulo wa batri wa Li-S: kuposa 99%. mphamvu pambuyo pa 200 zozungulira