Ibhetri ye-lithium-ion eguquguqukayo

Iqela labaphandi kwiYunivesithi yaseCalifornia lenze impumelelo kwitekhnoloji yebhetri -- enye eya kuvumela izixa ezikhulu zamandla ukuba zigcinwe kwiibhetri ezibhetyebhetye kakhulu, ezibhityileyo.

Ezi bhetri kulindeleke ukuba ziguqule kungekuphela nje itekhnoloji yabathengi kodwa kunye nezixhobo zonyango. Zenziwe nge-lithium-ion, ezenza zifane nebhetri yakho ye-smartphone. Umahluko omtsha kukuba banokuguquguquka ngaphandle kokuphuka. Oko kuyakwenza ukuba kube lula ukusebenzisa kwi-elektroniki esongelayo yexesha elizayo, njengeefowuni ezizayo ze-Samsung.

Ezi bhetri zitsha nazo azinakwenzeka ukuba zenze i-dendrites, nto leyo ethetha ukuba imiba yokhuseleko inokuthi ekugqibeleni ibe yinto yexesha elidlulileyo. I-Dendrites yiyo ebangela imililo yebhetri kunye nokuqhuma-into zonke iinkampani zobuchwepheshe zijolise ekuthinteleni kangangoko kunokwenzeka. Ifom ye-dendrites njengoko ibhetri ihlawulisa kwaye ikhuphe. Ukuba zikhula zifikelele kwezinye iindawo zentsimbi zebhetri, ngoko ke isekethi emfutshane inokwenzeka enokubangela ugqabhuko-dubulo okanye umlilo.

Izazinzulu aziqinisekanga ukuba ziyakuthatha ixesha elingakanani ukusuka kwiprototype ukuya kwimveliso yorhwebo, kodwa siyazi ukuba ezi bhetri ze-lithium-ion zintsha ziya kukhuseleka ngakumbi kunezi sinazo ngoku - kwaye zihlala ixesha elide. Ukufunyanwa kwapapashwa kwiphephancwadi ACS Nano.

Kufuneka kuqatshelwe ukuba izazinzulu kwiYunivesithi yaseStanford kunye ne-MIT zafumanisa lo mbandela ofanayo kwiminyaka emininzi edlulileyo, ebonisa ukuba nezinto eziqinileyo zinokuguquguquka ngaphakathi kwebhetri ngexesha lokujikeleza ngokuphindaphindiweyo (ukutshaja / ukukhupha). Ngelixa ilungile kwitekhnoloji yabathengi, oku kulishwa kwizixhobo zonyango kuba uninzi lwenziwe nge-silicone (yeyona nto ithambileyo). Izixhobo zonyango eziguquguqukayo ziya kufuna uvavanyo ngakumbi ukuqinisekisa ukhuseleko.

Iibhetri ezintsha nazo zilindeleke ukuba zibe namandla ngakumbi kuneebhetri ze-lithium-ion ezikhoyo, nangona zihlala zingacacanga ukuba oku kuyinyaniso kuzo zonke izicelo. Kuyaziwa ukuba iibhetri ziya kuba bhetyebhetye kakhulu kwaye zikwazi ukugoba kwiifom ezininzi ngaphandle kokwaphuka. Iqela lophando libanga ukuba igram enye yezinto zabo ezintsha inokugcina amandla amaninzi njengebhetri ye-AA, kodwa kuya kufuneka silinde kwaye sibone ukuba iinkampani zenza ntoni ngobu buchwepheshe ngaphambi kokuba sazi ngokuqinisekileyo.

isiphelo

Abaphandi baye benza iibhetri ze-lithium-ion ezinzima, eziguquguqukayo kwaye zincinci ukuba zenze i-dendrites. Balindele ukuba ezi bhetri zisetyenziswe kwiifowuni ezisongelwayo, izixhobo zonyango kunye nobunye ubuchwephesha. Akwaziwa ukuba kuya kuthatha ixesha elingakanani ukuba ezi bhetri zisuke kwiprototype ziye kwimveliso kwimarike.

Ubuchwephesha obutsha benziwa kwi-UC Berkeley kwaye yapapashwa kwijenali ye-ACS Nano. Iphinde yafunyanwa zizazinzulu kwiYunivesithi yaseStanford kunye neMIT kwiminyaka eliqela eyadlulayo. Olo phando lubonise ukuba nezinto eziqinileyo zinokuguquguquka ngaphakathi kwebhetri ngexesha lokuhamba ngebhayisikile (ukutshaja / ukukhupha). Ezi zinto zifunyanisiweyo zinelishwa elithile kwizixhobo zonyango, ezenziwe ubukhulu becala nge-silicone. Izixhobo zonyango eziguquguqukayo ziya kufuna ukuvavanywa ngakumbi ngaphambi kokuba zivunywe okanye zithengiswe ngokubanzi .

Ezi bhetri zintsha zilindeleke ukuba zibe namandla ngakumbi kuneebhetri ze-lithium-ion ezikhoyo. Kuhlala kungacacanga ukuba oku kuyinyani kuzo zonke izicelo. Iqela lophando libanga ukuba igram enye yemathiriyeli yabo entsha inokugcina ibhetri ye-AA, kodwa kuya kufuneka silinde kwaye sibone ukuba iinkampani zenza ntoni ngobu buchwepheshe ngaphambi kokuba sazi ngokuqinisekileyo.