Abaphandi baye baxela kwangaphambili inethiwekhi yekhabhoni entsha, efana negraphene, kodwa nge-microstructure eyinkimbinkimbi, enokuthi iholele kwiibhetri ezingcono zombane. Igraphene yeyona ndlela idumileyo yekhabhoni. Ifakwe njengomgaqo omtsha womdlalo we-lithium-ion itekhnoloji yebhetri, kodwa iindlela ezintsha zokuvelisa zinokuvelisa ngakumbi iibhetri ezinamandla kakhulu.
Igraphene inokubonwa njengothungelwano lweeathom zekhabhoni, apho iathom yekhabhoni nganye idityaniswe kwiiathom zekhabhoni ezintathu ezimeleneyo ukuvelisa iihexagons ezincinci. Nangona kunjalo, abaphandi bacinga ukuba ukongeza kwesi sakhiwo se-honeycomb, ezinye izakhiwo nazo zinokuveliswa.
Le yimathiriyeli entsha ephuhliswe liqela leYunivesithi yaseMarburg eJamani kunye neYunivesithi yaseAalto eFinland. Baqhagamshela iiathom zekhabhoni ukuya kumacala amatsha. Into ebizwa ngokuba yi-biphenyl network yenziwe ngamahexagons, izikwere kunye nee-octagons, eyigridi enzima ngakumbi kunegraphene. Abaphandi bathi, ngoko ke, ihluke kakhulu, kwaye kwezinye iinkalo, iipropati ze-elektroniki ezinqwenelekayo.
Ngokomzekelo, nangona i-graphene ixabiswa ngenxa yokukwazi kwayo njenge-semiconductor, inethiwekhi yekhabhoni entsha iziphatha njengentsimbi. Enyanisweni, xa iiathom ezingama-21 kuphela ububanzi, imigca yothungelwano lwe-biphenyl inokusetyenziswa njengeentambo zokuqhuba izixhobo zombane. Bachaza ukuba kweli nqanaba, igraphene isaziphatha njengesemiconductor.
Umbhali oyintloko wathi: "Olu hlobo olutsha lwenethiwekhi yekhabhoni lunokusetyenziswa njengento egqwesileyo ye-anode kwiibhetri ze-lithium-ion. Xa kuthelekiswa nezinto ezikhoyo ezisekelwe kwigraphene, inomthamo omkhulu wokugcina i-lithium."
I-anode yebhetri ye-lithium-ion idla ngokuqulunqwa nge-graphite esasazeka kwi-foil yobhedu. Ine-conductivity ephezulu yombane, engabalulekanga kuphela ngokubeka ukuguqulwa kwe-lithium ion phakathi kweengqimba zayo, kodwa nangenxa yokuba inokuqhubeka isenza oko okunokuba ngamawaka emijikelezo. Oku kuyenza ibhetri esebenza kakhulu, kodwa nebhetri enokuhlala ixesha elide ngaphandle kokuthotywa.
Nangona kunjalo, ezinye iindlela ezisebenzayo nezincinci ezisekwe kule nethiwekhi yekhabhoni entsha inokwenza ugcino lwamandla ebhetri lube lukhulu. Oku kunokwenza izithuthi zombane kunye nezinye izixhobo ezisebenzisa iibhetri ze-lithium-ion zibe zincinci kwaye zibe khaphukhaphu.
Nangona kunjalo, njengegraphene, ukufumana indlela yokwenza le nguqulelo intsha kwinqanaba elikhulu ngumceli mngeni olandelayo. Indlela yangoku yokudibanisa ixhomekeke kumphezulu ogudileyo wegolide apho iimolekyuli ezinekhabhoni ziqale zenze amatyathanga adibeneyo angama-hexagonal. Iimpendulo ezilandelayo ziqhagamshela la matyathanga ukuze zenze iimilo ezisisikwere kunye ne-octagonal, zenza iziphumo zokugqibela zahluke kwigraphene.
Aba baphandi bathi: “Ingcamango entsha kukusebenzisa imolecular precursors ukuvelisa ibiphenyl endaweni yegraphene.” Injongo ngoku kukuvelisa amaphepha amakhulu ukuze kuqondwe kakuhle iimpawu zayo.”
Ixesha lokuposa: Jan-06-2022
