Yintoni kanye kanye le nkqubo "yokuzoba imifanekiso" ibhekisa kuyo?

"Ukuguqulwa kweGraphitization"

“I-Graphitization” ibhekisa kwinkqubo yokunyanga ubushushu obuphezulu (ehlala iqhutywa kwi-2000°C ukuya kwi-3000°C nangaphezulu) eguqula isakhiwo sezinto ze-carbonaceous (ezifana ne-petroleum coke, i-coal tar pitch, i-anthracite coal, njl.njl.) ukusuka kwimeko engalungelelananga okanye ephantsi ukuya kwisakhiwo sekristale esifana ne-graphite yendalo. Ingundoqo yale nkqubo ikwindlela esisiseko yokulungelelanisa ii-athomu zekhabhoni, ezinika izinto iimpawu ezizodwa zomzimba nezekhemikhali eziphawuleka kwi-graphite.

Inkqubo eneenkcukacha kunye nendlela yokwenza iGraphitization

Amanqanaba okuNyangwa koBushushu

1. Indawo yobushushu obuphantsi (<1000°C)
   • Izinto eziguquguqukayo (umz., ukufuma, iihydrocarbons ezikhanyayo) ziyaguquguquka kancinci kancinci, kwaye isakhiwo siqala ukucutheka kancinci. Nangona kunjalo, iiathom zekhabhoni zihlala zingaphazamisekanga okanye zilungelelaniswe ixesha elifutshane.
2. Indawo yoBushushu obuPhakathi (1000–2000°C)
   • Iiathom zekhabhoni ziqala ukuphinda zilungelelanise ngokunyakaza kobushushu, zenze izakhiwo zenethiwekhi ezinamacala asixhenxe ezicwangciswe kwindawo ethile (ezifana nesakhiwo segrafiti). Nangona kunjalo, ukulungelelaniswa kwee-interlayer kuhlala kungalungelelaniswanga.
3. Indawo yobushushu obuphezulu (>2000°C)
   • Xa ixesha elide kuvezwa kubushushu obuphezulu, iileya zekhabhoni ziyahambelana ngokuthe ngcembe, zenze isakhiwo sekristale esinee-dimensional layers (isakhiwo segrafiti). Amandla aphakathi kweeleya ayancipha (unxibelelwano lwevan der Waals), ngelixa amandla e-covalent bond ekwi-plane esanda.

Utshintsho oluPhambili kwiSakhiwo

• Uhlengahlengiso lweAthomu yeKhabhoni: Utshintsho ukusuka kwisakhiwo esingenasimo se-"turbostatic" ukuya kwisakhiwo esicwangcisiweyo se-"layered", kunye neeathomu zekhabhoni ezingaphakathi kwiplanethi ezenza ii-sp² hybridized covalent bonds kunye ne-interlayer bonding ngokusebenzisa amandla e-van der Waals.
• Ukususwa Kweziphene: Amaqondo obushushu aphezulu anciphisa iziphene zekristale (umz., izithuba, ukusasazeka), okwandisa ubukhristalo kunye nokuqina kwesakhiwo.

Iinjongo Eziphambili Zokwenza I-Graphitization

1. Ukuqhuba Umbane Okuphuculweyo
   • Iiathom zekhabhoni ezicwangcisiweyo zenza inethiwekhi eqhubayo, evumela ukuhamba kwee-electron ngokukhululekileyo ngaphakathi kweeleya kwaye inciphisa kakhulu ukuchasana (umz., i-graphitized petroleum coke ibonisa ukuchasana okungaphantsi ngokuphindwe kalishumi kunezixhobo ezingezizo ii-graphitized).
   • Izicelo: Ii-electrode zebhetri, iibhrashi zekhabhoni, izixhobo zoshishino lombane ezifuna umbane ophezulu.
2. Ukuphuculwa kozinzo lobushushu
   • Izakhiwo ezicwangcisiweyo ziyamelana ne-oxidation okanye ukubola kumaqondo obushushu aphezulu, nto leyo eyonyusa ukumelana nobushushu (umz., izinto ezifakelwe i-graphit zimelana ne->3000°C kwi-atmospheres ezingasebenziyo).
   • Izicelo: Izixhobo ezirhabaxa, izixhobo zokutshisa ezinobushushu obuphezulu, iinkqubo zokukhusela ubushushu beenqwelo-moya.
3. Iipropati zoomatshini ezilungiselelweyo
   • Nangona i-graphitization inokunciphisa amandla apheleleyo (umz., ukwehla kwamandla okucinezelwa), isakhiwo esineengqimba singenisa i-anisotropy, sigcina amandla aphezulu ngaphakathi kwaye sinciphisa ukuqhekeka.
   • Izicelo: Ii-electrode zeGraphite, iibhloko ezinkulu ze-cathode ezifuna ukumelana nobushushu kunye nokumelana nokuguguleka.
4. Uzinzo oluKhulisiweyo lweeKhemikhali
   • Ukuqina okuphezulu kwekristale kunciphisa iindawo ezisebenzayo kumphezulu, kunciphisa amazinga okusabela ngeoksijini, iiasidi, okanye iziseko, kwaye kuphucula ukumelana nokugqwala.
   • Izicelo: Izikhongozeli zeekhemikhali, ii-linings ze-electrolyzer kwiindawo ezirhabaxa.

Izinto Ezichaphazela Ukwenziwa Kwemifanekiso

1. Iipropati zezinto eziluhlaza
   • Umxholo ophezulu wekhabhoni ozinzileyo wenza kube lula ukwenziwa kwegrafiti (umz., i-petroleum coke graphitizes kulula ngakumbi kune-coal tar pitch).
   • Ukungcola (umz., isalfure, initrogen) kuyayithintela indlela yokuhlengahlengisa iathom kwaye kufuna unyango lwangaphambi kokuba kusetyenziswe i-athomu (umz., ukususwa kwi-sulfurization).
2. Iimeko Zonyango Lobushushu
   • Ubushushu: Amaqondo obushushu aphezulu andisa izinga lokubonisa igrafu kodwa anyusa iindleko zezixhobo kunye nokusetyenziswa kwamandla.
   • Ixesha: Ixesha elide lokubamba liphucula ukugqibelela kwesakhiwo, kodwa ixesha elide kakhulu linokubangela ukurhabaxa kwengqolowa kunye nokwehla kokusebenza.
   • Imo engqongileyo: Iindawo ezingasebenziyo (umz., i-argon) okanye ii-vacuum zithintela i-oxidation kwaye zikhuthaza iimpendulo ze-graphitization.
3. Izongezo
   • IiCatalysts (umz., i-boron, i-silicon) zinciphisa amaqondo obushushu e-graphitization kwaye ziphucula ukusebenza kakuhle (umz., i-boron doping inciphisa amaqondo obushushu afunekayo nge ~500°C).

Ukuthelekiswa kwezinto ezisebenzisa iGraphitized vs. Non-Graphitized

Amatyala Okusetyenziswa Okusebenzayo

1. Ii-electrode zeGraphite
   • I-petroleum coke okanye i-coal tar pitch yenziwe nge-graphit ukuze kuveliswe ii-electrode ezinamandla aphezulu okwenza intsimbi yesithando somlilo se-arc, ezihlala ixesha elide >3000°C kunye nemisinga enamandla.
2. Ii-Anode zeBhetri yeLithium-Ion
   • I-graphite yendalo okanye eyenziweyo (i-graphitized) isebenza njengezinto ze-anode, isebenzisa isakhiwo sayo esineengqimba ukuze i-lithium-ion intercalation/deintercalation ikhawuleze, iphucule ukusebenza kakuhle kwe-charge/discharge.
3. Ukwenza iCarburizer ngentsimbi
   • I-graphitized petroleum coke, enesakhiwo sayo esineembobo kunye nomxholo ophezulu wekhabhoni, inyusa ngokukhawuleza umxholo wekhabhoni kwisinyithi esinyibilikisiweyo ngelixa inciphisa ukungena kokungcola kwesalfure.