Abaphandi baqikelele inethiwekhi entsha yekhabhoni, efana ne-graphene, kodwa enesakhiwo esintsonkothileyo ngakumbi, esinokubangela iibhetri zezithuthi zombane ezingcono. I-Graphene mhlawumbi lolona hlobo ludumileyo lwekhabhoni. Isetyenziswe njengomthetho omtsha womdlalo wetekhnoloji yebhetri ye-lithium-ion, kodwa iindlela ezintsha zokuvelisa zinokuvelisa iibhetri ezisebenzisa amandla amaninzi.
I-Graphene inokubonwa njengothungelwano lweeathom zekhabhoni, apho iathom nganye yekhabhoni iqhagamshelwe kwiiathom ezintathu zekhabhoni ezikufutshane ukuze kuveliswe iihexagons ezincinci. Nangona kunjalo, abaphandi baqikelela ukuba ukongeza kolu lwakhiwo lwehoneycomb ngqo, ezinye izakhiwo zinokuveliswa.
Le yimpahla entsha eyenziwe liqela elivela kwiYunivesithi yaseMarburg eJamani nakwiYunivesithi yaseAalto eFinland. Badibanisa iiathom zekhabhoni kwiindlela ezintsha. Inethiwekhi ebizwa ngokuba yi-biphenyl yenziwe ziihexagons, izikwere kunye nee-octagon, eyigridi entsonkothileyo kune-graphene. Abaphandi bathi, ke ngoko, ineempawu ze-elektroniki ezahluke kakhulu, kwaye kwezinye iindlela, ezinqwenelekayo.
Umzekelo, nangona i-graphene ixatyiswa ngenxa yesakhono sayo njenge-semiconductor, inethiwekhi entsha yekhabhoni isebenza njengesinyithi. Enyanisweni, xa ingama-athomu angama-21 kuphela ububanzi, imicu yenethiwekhi ye-biphenyl ingasetyenziswa njengemisonto yokuqhuba izixhobo ze-elektroniki. Babonise ukuba kwesi sikali, i-graphene isasebenza njenge-semiconductor.
Umbhali oyintloko uthe: “Olu hlobo lutsha lwenethiwekhi yekhabhoni lungasetyenziswa njengesixhobo esibalaseleyo se-anode kwiibhetri ze-lithium-ion. Xa kuthelekiswa nezixhobo ezisekwe kwi-graphene zangoku, inomthamo omkhulu wokugcina i-lithium.”
I-anode yebhetri ye-lithium-ion idla ngokwenziwa yi-graphite spread kwi-copper foil. Ine-conductivity ephezulu yombane, engapheleli nje ekubekeni ii-lithium ion phakathi kweengqimba zayo, kodwa kwanokuba ingaqhubeka nokwenza njalo kangangeenkulungwane zemijikelo. Oku kuyenza ibe yibhetri esebenza kakuhle kakhulu, kodwa ikwayibhetri enokuhlala ixesha elide ngaphandle kokuwohloka.
Nangona kunjalo, ezinye iindlela ezisebenzayo nezincinci ezisekelwe kule network intsha yekhabhoni zinokwenza ukugcinwa kwamandla ebhetri kube nzima ngakumbi. Oku kunokwenza izithuthi zombane kunye nezinye izixhobo ezisebenzisa iibhetri ze-lithium-ion zibe zincinci kwaye zibe lula.
Nangona kunjalo, njenge-graphene, ukufumana indlela yokwenza olu hlobo lutsha ngomlinganiselo omkhulu ngumceli mngeni olandelayo. Indlela yangoku yokuhlanganisa ixhomekeke kumphezulu wegolide ogudileyo apho iimolekyuli ezinekhabhoni ekuqaleni zenza khona imixokelelwane edibeneyo ene-hexagonal. Iimpendulo ezilandelayo zidibanisa la maxokelelwane ukuze zenze iimilo zesikwere kunye ne-octagonal, okwenza isiphumo sokugqibela sahluke kwi-graphene.
Abaphandi bacacisa bathi: “Ingcinga entsha kukusebenzisa ii-precursors ze-molecular ezilungisiweyo ukuvelisa i-biphenyl endaweni ye-graphene. Injongo ngoku kukuvelisa amaphepha amakhulu ezinto ukuze iimpawu zayo ziqondwe ngcono.”
Ixesha lokuthumela: Jan-06-2022
