AmaJalimane athole indlela yokwandisa umthamo wamabhethri e-lithium-ion ngengxenye yesithathu

Abacwaningi abavela eJalimane Institute of Technology Karlsruhe (KIT) eshicilelwe ishicilele isihloko ku-Nature Communications esichaza indlela yokuwohloka kwe-cathode kumabhethri e-lithium-ion anamandla amakhulu. Ucwaningo lwenziwa njengengxenye yokuthuthukiswa kwamabhethri akhuphukile amandla nokusebenza kahle. Ngaphandle kokuqonda okunembile kwezinqubo zokuwohloka kwe-cathode, akunakwenzeka ukukhulisa ngempumelelo umthamo wamabhethri ngokusebenza okuphezulu kakhulu, okudingekayo ekuthuthukisweni kwezimoto zikagesi. Ososayensi bayaqiniseka ukuthi ulwazi oluzuziwe luzovumela amandla amabhethri e-lithium-ion ukuba akhuphuke ngo-30%.

Amabhethri asebenza kakhulu ezimoto nezinye izinhlelo zokusebenza adinga isakhiwo se-cathode esihlukile. Emabhethri esimanje e-lithium-ion, i-cathode iyisakhiwo se-multilayer sama-oxides anezilinganiso ezihlukahlukene ze-nickel, i-manganese ne-cobalt. Amabhethri anamandla aphezulu adinga ama-cathode ahlanganiswe ne-manganese ane-lithium eyeqile, okwandisa amandla okugcina amandla ngeyunithi ngayinye yevolumu/ubuningi bempahla ye-cathode. Kodwa izinto ezinjalo zazingaphansi kokuwohloka ngokushesha.

Ngesikhathi sokusebenza okuvamile, lapho i-cathode icebisa noma ilahlekelwa i-lithium ion, i-high-energy cathode material iyabhujiswa. Ngemva kwesikhathi esithile, i-oxide egqinsiwe iphenduka isakhiwo esicwebezelayo esinezici ze-electrochemical ezingathandeki kakhulu. Lokhu kwenzeka kakade ezinyathelweni zokuqala zokusebenza kwebhethri, okuholela ekwehleni okusheshayo kwesilinganiso sokushaja kanye namanani okukhipha.

Ochungechungeni lokuhlola, ososayensi baseJalimane bathola ukuthi ukuwohloka akwenzeki ngokuqondile, kodwa ngokungaqondile ngokwakhiwa kokusabela okunzima ukunquma ngokwakhiwa kosawoti oqinile oqukethe i-lithium. Ngaphezu kwalokho, umoya-mpilo ubonakala udlala indima ebalulekile ekuphenduleni. Abacwaningi bakwazi nokuthola iziphetho ezintsha mayelana nezinqubo zamakhemikhali kumabhethri e-lithium-ion angase angaholeli ekulimazeni kwe-cathode. Besebenzisa imiphumela etholiwe, ososayensi banethemba lokunciphisa ukucekelwa phansi kwe-cathode futhi ekugcineni bakhe uhlobo olusha lwebhethri elinamandla amakhulu.

Source: 3dnews.ru