Vatsvakurudzi vakafungidzira itsva kabhoni network, yakafanana negraphene, asi ine microstructure yakaoma, iyo inogona kutungamirira kune zviri nani mabhatiri emotokari yemagetsi. Graphene ndiyo inonyanya kuzivikanwa fomu yekabhoni. Yakatemerwa senge ingangoita mutambo mutsva mutemo welithium-ion bhatiri tekinoroji, asi nzira nyowani dzekugadzira dzinogona kupedzisira dzaburitsa mamwe mabhatiri ane simba.
Graphene inogona kuonekwa se network yemaatomu ekabhoni, apo atomu yekabhoni yega yega inobatana nemaatomu matatu ekabhoni ari pedyo kuti ibudise tumakona tutanhatu. Zvisinei, vatsvakurudzi vanofungidzira kuti kuwedzera kune iyi yakananga huchi chimiro, mamwe maitiro anogonawo kugadzirwa.
Ichi ndicho chinyorwa chitsva chakagadzirwa nechikwata kubva kuYunivhesiti yeMarburg kuGermany neAalto University kuFinland. Vakakochekera maatomu ecarbon munzira itsva. Iyo inonzi biphenyl network inoumbwa nehexagons, squares uye octagons, inova grid yakaoma kupfuura graphene. Vatsvakurudzi vanoti, saka, ine zvakasiyana zvakasiyana, uye mune dzimwe nzira, zvakanyanya kudiwa zvemagetsi zvinhu.
Semuenzaniso, kunyangwe graphene ichikosheswa pakugona kwayo semiconductor, iyo itsva kabhoni network inoita kunge simbi. Muchokwadi, kana maatomu makumi maviri nerimwe chete akafara, mitsetse yebiphenyl network inogona kushandiswa setambo dzinofambisa dzemidziyo yemagetsi. Vakataura kuti pachiyero ichi, graphene ichiri kuita semiconductor.
Munyori mukuru akati: "Iyi rudzi rutsva rwekabhoni network inogonawo kushandiswa seyakanakisa anode zvinhu zvemabhatiri e-lithium-ion. Kana ichienzaniswa neyezvino graphene-based materials, ine yakakura lithium yekuchengetedza."
Iyo anode yebhatiri ye-lithium-ion inowanzoumbwa negraphite yakapararira pamapuranga emhangura. Iyo ine yakakwirira yemagetsi conductivity, iyo isingakoshi chete pakudzoreredza kuisa lithium ions pakati pezvikamu zvayo, asi zvakare nekuti inogona kuramba ichidaro kune zvingangoita zviuru zvekutenderera. Izvi zvinoita kuti ive bhatiri rinoshanda zvakanyanya, asiwo bhatiri rinogona kugara kwenguva yakareba pasina kuderedzwa.
Nekudaro, dzimwe nzira dzinoshanda uye diki dzinobva pane ino nyowani kabhoni network inogona kuita kuti bhatiri rekuchengetedza simba riwedzere. Izvi zvinogona kuita kuti mota dzemagetsi nemimwe midziyo inoshandisa lithium-ion mabhatiri ave madiki uye akareruka.
Nekudaro, senge graphene, kufunga nzira yekugadzira iyi vhezheni itsva pamwero mukuru ndiro dambudziko rinotevera. Iyo yazvino nzira yekuunganidza inotsamira pane yakanyanya kutsetseka yegoridhe pamusoro pairi iyo kabhoni-ine mamorekuru anotanga kuumba akabatana hexagonal cheni. Maitiro anotevera anobatanidza maketani aya kuti aumbe masikweya uye octagonal maumbirwo, zvichiita kuti mhedzisiro isiyane negraphene.
Vatsvakurudzi vakatsanangura kuti: “Pfungwa itsva ndeyokushandisa ma<em>molecular precursors kugadzira biphenyl panzvimbo pegraphene.
Nguva yekutumira: Jan-06-2022
