Abacwaningi babikezele inethiwekhi entsha ye-carbon, efana ne-graphene, kodwa nge-microstructure eyinkimbinkimbi, engaholela kumabhethri emoto kagesi angcono.I-graphene ngokungangabazeki iwuhlobo lwekhabhoni oludume kakhulu.Kuthengwe njengomthetho womdlalo omusha ongaba khona wobuchwepheshe bebhethri ye-lithium-ion, kodwa izindlela ezintsha zokukhiqiza zingagcina zikhiqize amabhethri asebenzisa amandla amaningi.
I-graphene ingabonakala njengenethiwekhi yama-athomu ekhabhoni, lapho i-athomu yekhabhoni ngayinye ixhunywe kuma-athomu ekhabhoni amathathu ancikene ukuze kukhiqizwe amaheksagoni amancane.Kodwa-ke, abacwaningi bacabanga ukuthi ngaphezu kwalesi sakhiwo esiqondile sezinyosi, ezinye izakhiwo nazo zingakhiqizwa.
Lena indaba entsha ethuthukiswe yithimba laseNyuvesi yaseMarburg eJalimane kanye naseNyuvesi yase-Aalto eFinland.Bahlanganisa ama-athomu e-carbon ezindaweni ezintsha.Inethiwekhi ebizwa nge-biphenyl yakhiwe ngamaheksagoni, izikwele nama-octagons, okuyigridi eyinkimbinkimbi kune-graphene.Abacwaningi bathi, ngakho-ke, ihluke kakhulu, futhi kwezinye izici, izakhiwo ze-elekthronikhi ezifiseleka kakhulu.
Isibonelo, nakuba i-graphene ihlonishwa ngekhono layo njenge-semiconductor, inethiwekhi yekhabhoni entsha iziphatha njengensimbi.Eqinisweni, lapho ama-athomu angama-21 kuphela ububanzi, imithende yenethiwekhi ye-biphenyl ingasetshenziswa njengezintambo eziqhutshwayo zemishini kagesi.Baveze ukuthi kulesi sikali, igraphene isaziphatha njengesemiconductor.
Umbhali oyinhloko wathi: “Lolu hlobo olusha lwenethiwekhi ye-carbon lungasetshenziswa futhi njengento enhle kakhulu ye-anode yamabhethri e-lithium-ion.Uma iqhathaniswa nezinto zamanje ezisekelwe ku-graphene, inomthamo omkhulu wokugcina we-lithium. "
I-anode yebhethri ye-lithium-ion ivamise ukwakhiwa ngokusatshalaliswa kwegraphite kucwecwe lwethusi.Ine-conductivity ephezulu kagesi, okungabalulekile nje kuphela ekubekeni ngokuhlehla i-lithium ion phakathi kwezendlalelo zayo, kodwa futhi ngenxa yokuthi ingaqhubeka nokwenza kanjalo izinkulungwane zemijikelezo.Lokhu kuyenza ibe ibhethri elisebenza kahle kakhulu, kodwa futhi ibhethri elingahlala isikhathi eside ngaphandle kokuwohloka.
Nokho, ezinye izindlela ezisebenza kahle nezincane ezisekelwe kule nethiwekhi yekhabhoni entsha zingenza ukugcinwa kwamandla ebhethri kuqine kakhulu.Lokhu kungase kwenze izimoto zikagesi nezinye izisetshenziswa ezisebenzisa amabhethri e-lithium-ion zibe zincane futhi zibe lula.
Kodwa-ke, njenge-graphene, ukuthola indlela yokwenza le nguqulo entsha ngezinga elikhulu kuyinselelo elandelayo.Indlela yamanje yokuhlanganisa incike endaweni yegolide ebushelelezi kakhulu lapho ama-molecule aqukethe i-carbon ekuqaleni akha amaketanga axhumene anezinhlangothi ezine.Ukusabela okulandelayo kuxhuma la maketango ukuze akhe umumo oyisikwele kanye ne-octagonal, okwenza umphumela wokugcina uhluke ku-graphene.
Abacwaningi bachaza: “Umbono omusha uwukusebenzisa izandulela zamangqamuzana ezilungisiwe ukuze kukhiqizwe i-biphenyl esikhundleni se-graphene.Umgomo manje uwukukhiqiza amaphepha amakhulu ezinto ukuze izici zawo ziqondwe kangcono.”
Isikhathi sokuthumela: Jan-06-2022