Iphepha le-graphite, into esekelwe kukhabhoni yenoveli-, lenziwe nge-graphite yemvelo noma i-pyrolytic graphite (HOPG) ene-oriented kakhulu (HOPG) ngenqubo yokucwenga okukhethekile kanye nenqubo yokucindezela. Ihlanganisa ukuhanjiswa kukagesi okuhle kakhulu, ukuguquguquka kwe-thermal, nokuzinza kwamakhemikhali egraphite nokukhanya, ukuzaca, nokuguquguquka kwephepha. Ukudalwa kwayo akuyona nje impumelelo ebalulekile kusayensi yezinto ezibonakalayo, kodwa futhi kukhombisa amandla ajulile okusebenza emikhakheni efana namandla, ama-electronics, kanye nemvelo, ukushayela ukuqanjwa kabusha kwezobuchwepheshe kanye nokujulisa ukuqonda kwesayensi.
1. Ukuphumelela Kwesayensi Esakhiweni nasekusebenzeni: Ukuthuthukiswa Okudidiyelwe kusuka ku-Micro ukuya ku-Macro
Ukubaluleka kwesayensi kwephepha le-graphite kubonakala ngokuyinhloko ekusebenzisaneni okuyingqayizivele phakathi kwe-microstructure kanye nezakhiwo ze-macroscopic. Izinto zendabuko ze-graphite ngokuvamile ziyinqwaba noma ifomu lempushana, okwenza kube nzima ukuzisebenzisa ngokuqondile ezinhlelweni ezidinga ukukhanya nokuvumelana nezimo. Nokho, ngokulawula ukunqwabelana kwe-interlayer kwama-graphite microsheet (ngokuvamile agcine isakhiwo esi-odiwe sezendlalelo ezithile ze-sp² hybridized carbon), iphepha le-graphite lizuza ukwakhiwa kwesilinganiso esiphambene-kusuka{3}}kuma-nanosheet anobukhulu obubili ukuya ku-macroscopic continuum. Ukujiya kwayo okujwayelekile kungu-0.05-1mm kuphela, futhi ukuminyana kwayo kucishe kube ngu-2.1-2.3g/cm³ (eduze nokuminyana kwe-graphite). Kodwa-ke, iyaziqhayisa-nge-thermal conductivity yendiza engu-1000-3000 W/(m·K) (eqhathaniseka ne-graphene yesendlalelo esisodwa), ukuqhutshwa kukagesi okungu-10⁵-10⁶ S/m (cishe u-80% wethusi), kanye nokungangeni kahle kwamakhemikhali (ukumelana ne-asidi ne-alkali, ukumelana ne-alkali). Le nhlanganisela ye-lightweight, high conductivity, kanye nokuzinza inqoba ukuhweba okungokwemvelo kokusebenza kwezinto ezivamile, ihlinzeka ngesisekelo esibalulekile sokubhekana nezinselele zokulawula ukushisa ekudlulisweni kwamandla kanye nesidingo sokushintshwa kwamandla kagesi okuguquguqukayo kumishini kagesi.
2. Ukuqamba Okusha Emkhakheni Wamandla: Ukuthuthukisa Ukuphathwa Kwezifudumezi kanye Nekhono Lokugcina Amandla
Ngokumelene nesizinda sentuthuko esheshayo kubuchwepheshe bamandla, inani eliyinhloko lephepha le-graphite libonakala ngokuyinhloko ekuphathweni okushisayo. Ngokusetshenziswa kabanzi{{1}kwamadivayisi aminyana kakhulu (njengama-chips esiteshi se-5G namabhethri emoto yamandla amasha), ukonakala kokusebenza kanye nezehlakalo zokuphepha ezibangelwa ukushisa okweqile kwendawo kube umgoqo omkhulu. Iphepha le-graphite, neline-eliphezulu{5}}ekuphatheni okushisayo kwendiza, liphatha kahle ukushisa ngendlela eqondisiwe (isibonelo, ukuqhutshwa kwe-thermal kuhlangothi oluqondile lwe-interlayer cishe ku-10 W/(m·K), kuyilapho lingafinyelela ezinkulungwaneni ezimbalwa{7}}lapho indiza iqonde khona). Lokhu kuyenza isetshenziswe kabanzi kuma-thermal diffusion layers (njengefilimu yokushisa ye-graphite ebhethri lika-Tesla lika-4680) nanjengama-substrates akhipha ukushisa ama-chips e-LED. Idatha yokuhlola ibonisa ukuthi ukwengeza ungqimba lwebhafa yephepha le-graphite kumamojula webhethri ye-lithium kunganciphisa izinga lokushisa eliphezulu ngesikhathi sokushajwa nokukhipha ngamadigri angu-15-20 futhi kunwebise impilo yomjikelezo ngaphezu kuka-30%.
Iphepha le-graphite nalo lidlala indima ebalulekile kumadivayisi okugcina amandla. Njengempahla ye-electrode eguquguqukayo yama-supercapacitor, ukusebenza kwayo okuphezulu kunciphisa ukumelana nobuso (ngaphezu kwama-50% aphansi kunama-electrode ekhabhoni acushiwe). Isakhiwo sayo esinezendlalelo sihlinzeka ngezindlela ezisheshayo-ezinobukhulu bobubanzi bomzila wama-ion (njenge-Li⁺ ne-Na⁺), okuvumela idivayisi ukuthi igcine ngaphezu kuka-90% womthamo wayo wokuqala ngisho noma igobile. Okuphawuleka nakakhulu, iphepha le-graphite lingasebenza njengengxenye esekelayo yezingqimba eziqinile-zesimo se-electrolyte. Ukusebenza kobuso (okufana nokwethulwa kwamaqembu e-sulfonic acid) kungathuthukisa ukufakwa okufanayo kwe-lithium ion kumabhethri ensimbi ye-lithium, kuvimbele ukukhula kwe-dendrite, futhi ngaleyo ndlela kuthuthukise ukuphepha kwebhethri.
3. I-Epowering Electronics and Sensing Technologies: I-Cornerstone Material ye-Flexible Electronics
Ngokuthuthuka okusheshayo kwemishini ye-elekthronikhi eguquguqukayo (njengezinzwa ezigqokekayo nezikrini zokuthintwa zesikrini ezigoqekayo), izinto ezivamile eziqinile zokuqhuba (njengamafilimu ensimbi ne-indium tin oxide (ITO)) azikwazi ukuhlangabezana nalezi zidingo ngenxa yokuqina kwazo nokungaguquki. Izinto ezimbaxambili zephepha legraphite lokuguquguquka nokuhamba zilenza libe enye indlela ekahle: lingakwazi ukumelana nokugoba okungaphezu kuka-10⁵ (nge-curvature radius engaphansi kuka-1mm) ngaphandle kokulahlekelwa ukuqhutshwa kwe-conductivity, futhi lingakhiwa libe nanoma isiphi isimo ngokusebenzisa imishini elula (efana nokusika nokubhoboza). Isibonelo, kuzinzwa zokucindezeleka eziguquguqukayo, iphepha le-graphite lihlanganiswe nama-polymers anwebekayo, asebenzisa ukuzwela kwawo ezinguqukweni zokumelana nogesi ngobunzima (ene-sensitivity coefficient (GF) engu-5–10), okuvumela{6}}ukuqapha okuphezulu kokunemba kokuguqulwa kwamaminithi (okufana nokushaya kwenhliziyo komuntu nokunyakaza kwamalunga). Emkhakheni wesikhumba se-electronic, izinzwa ezisekelwe ephepheni le-graphite{8}zingasebenza ngokuzinzile ebangeni elibanzi lokushisa elingu--20℃kuya ku-150 degree, linikeze usekelo olubalulekile lobuchwepheshe lwempendulo ethintekayo kumarobhothi e-biomimetic.
4. Inani elingaba khona Kwezemvelo kanye Nesayensi Esimeme
Ukubaluleka kwesayensi kwephepha le-graphite kudlulela nasekuvikelweni kwemvelo. I-raw material yayo, i-graphite, iyinsada yekhabhoni etholakala oqweqweni loMhlaba (izindawo ezigciniwe ze-graphite zemvelo zomhlaba zidlula amathani ayizigidi ezingama-300). Ngaphezu kwalokho, inqubo yokukhiqiza ivumela ukugaywa kabusha kwama-electrode e-graphite (njengalawo avela ekwenziweni kwensimbi), kuzuzwe ukusetshenziswa kabusha kwensiza, ngokuhambisana nezimiso zamakhemikhali aluhlaza. Ngaphezu kwalokho, ukwakheka kwephepha le-graphite elinezimbotshana (i-porosity yalo ingalungiswa ngenqubo yokunciphisa i-oxidation{4}}) iyenza ikwazi ukukhombisa ukusebenza okuhle kakhulu kwe-adsorption yezinto ezingcolisayo njengama-ion esindayo kanye nodayi bemvelo. Ukuhlola kubonise ukuthi i-amino-iphepha le-graphite elisebenzayo lingafinyelela umthamo we-adsorption ongu-280 mg/g we-Pb²⁺, odlula kakhulu lowo wekhabhoni ecushiwe (cishe u-100 mg/g). Ngokuhamba kwesikhathi, njengomsebenzi omele ikhabhoni{10}osekelwe kuzinto ezisebenzayo, iphepha le-graphite lihlinzeka ngenkundla yezinto entsha yobuchwepheshe "bekhabhoni{11}}kuya{12}}kukhabhoni" (njenge-carbon dioxide adsorption nokuguqulwa) okuhloswe ngayo ukuzuza ukungathathi hlangothi kwekhabhoni.
Ukubaluleka kwesayensi kwephepha le-graphite akukhona nje kuphela ekusebenzeni kwalo kwempumelelo kodwa futhi endimeni yalo "njengempahla yebhuloho," ehlanganisa ucwaningo oluyisisekelo kanye nezinhlelo zokusebenza zobunjiniyela: kusukela ekudaluleni amaphethini wokuhlanganisa wezinto ezimbili-zekhabhoni ezinobukhulu obuncane kuya ekuthuthukiseni izinto ezintsha kumandla, izinto zikagesi, kanye nobuchwepheshe bezemvelo ku-macroscale. Ngokuthuthukiswa kwezinqubo zokulungiselela (njengokukhula okuqondile kwephepha{2}}lendawo yegraphite enkulu kusetshenziswa i-chemical vapor deposition (CVD)) kanye nentuthuko eyengeziwe ekwakhiweni kokusebenza (njengokushintshashintsha kwesakhiwo se-electronic ngokusebenzisa i-doping nge-nitrogen noma i-athomu ye-boron), iphepha le-graphite kulindeleke ukuthi liqhubeke nokwandisa imingcele yalo yokusetshenziswa futhi libe enye yezinto eziyisisekelo eziyisisekelo ze-Industrial Revolution.
