graphite paper, kaboni empya-ekintu ekyesigamiziddwa ku kintu, kikolebwa okuva mu grafayiti ey’obutonde oba graphite ey’obutonde eya pyrolytic graphite (HOPG) okuyita mu nkola ey’enjawulo ey’okusekula n’okunyiga. Egatta obutambuzi bw’amasannyalaze obulungi ennyo, obutambuzi bw’ebbugumu, n’obutebenkevu bwa kemiko bwa grafayiti n’obuweweevu, obugonvu, n’okukyukakyuka kw’empapula. Okutondebwa kwayo si kumenya kwa maanyi kwokka mu sayansi w’ebintu, wabula era kulaga obusobozi obw’amaanyi obw’okukozesa mu bintu ng’amaanyi, ebyuma eby’amasannyalaze, n’obutonde bw’ensi, okuvuga obuyiiya bwa tekinologiya n’okunyweza okutegeera kwa ssaayansi.
1. Okumenyawo kwa sayansi mu nsengeka n’enkola: Okukwatagana okukwatagana okuva ku micro okutuuka ku macro .
Amakulu ga ssaayansi ag’olupapula lwa grafayiti okusinga geeyolekera mu kukwatagana kwalwo okw’enjawulo wakati w’obutonde obutono n’ebintu ebinene. Ebintu bya graphite eby’ennono bisinga kuba mu ngeri ya bulk oba powder, ekizikaluubiriza okusiiga butereevu mu nkola ezeetaaga obuzito obutono n’okukyukakyuka. Naye, nga tufuga okutuuma kwa interlayer kwa graphite microsheets (okusinga okukuuma ensengekera elagiddwa eya layers za kaboni ezimu eza SP2 ezigatta), empapula za graphite zituuka ku cross-nzimba okuva ku bbiri-dimensional nanosheets okutuuka ku macroscopic continuum. Obugumu bwayo obwa bulijjo buba 0.05 yokka-1mm, era density yaayo eri nga 2.1-2.3g/cm3 (okumpi ne density ya graphite ey’enzikiriziganya). Naye, yeewaanira mu-ennyonyi okutambuza ebbugumu kwa 1000-3000 W/(m·k) (okugeraageranya ku graphene ya layeri emu), okutambuza amasannyalaze okwa 10⁵-10⁶ S/M (kumpi 80% ku kikomo), n’obuziyiza bwa kemiko obulungi ennyo (acid resistances (acid resistances, acixed resistances (acid resistance), n’oxidation, n’oxidation), n’obugumu obulungi obw’eddagala (acid resistance (acid resistances), n’obuziyiza bwa 80%). Omugatte guno ogw’obuzito obutono, obutambuzi obw’amaanyi, n’okutebenkera bivvuunuka okusuubulagana kw’omutindo gw’ebintu eby’ennono, okuwa omusingi omukulu ogw’ebintu okukola ku kusoomoozebwa kw’okuddukanya ebbugumu mu kutambuza amaanyi n’obwetaavu bw’obutambuzi bw’amasannyalaze obukyukakyuka mu byuma eby’amasannyalaze.
2. Obuyiiya mu kitongole ky’amasannyalaze: Okulongoosa enzirukanya y’ebbugumu n’okutereka amaanyi mu ngeri .
Okusinziira ku mbeera y’enkulaakulana ey’amangu mu tekinologiya w’amasoboza, omugaso omukulu ogw’olupapula lwa graphite okusinga kweyolekera mu kuddukanya ebbugumu. Nga waliwo okwettanira ennyo ebyuma ebiwanvu-eby’amaanyi (nga 5g base station chips ne battery z’emmotoka ez’amaanyi empya), okukendeera kw’omutindo n’okutuuka ku bukuumi obuva ku kubuguma okusukkiridde mu kitundu bifuuse ekizibu ekinene. Olupapula lwa graphite, nga lulina ultra-high in -okuyisa ebbugumu ly’ebbugumu ly’ennyonyi, lukola bulungi ebbugumu mu ngeri egenderere (okugeza, obutambuzi bw’ebbugumu mu ludda oluwanvu ku kisenge wakati buba nga 10 W/(m·k), so nga busobola okutuuka enkumi eziwera mu IN-Plane direction). Kino kigifuula ekozesebwa nnyo mu layers za battery thermal diffusion (nga graphite heat dissipation film mu Tesla's 4680 battery) era nga ebbugumu dissipation substrates for LED chips. Ebiwandiiko eby’okugezesa biraga nti okugattako graphite paper buffer layer ku lithium battery modules kiyinza okukendeeza ku bbugumu erisinga mu kiseera kya charge ne discharge ne 15-20℃n’okugaziya obulamu bw’enzirukanya n’ebitundu ebisukka mu 30%.
Olupapula lwa graphite era lukola kinene nnyo mu byuma ebitereka amaanyi. Nga ekintu ekigonvu eky’amasannyalaze ekya supercapacitors, obutambuzi bwakyo obw’amaanyi bukendeeza ku buziyiza bw’ensengekera (okusukka 50% wansi okusinga obusannyalazo bwa kaboni obukola obw’ennono). Ensengekera yaayo eya layeri egaba amakubo ga ayoni (3}}dimensional diffusion pathways for ions (nga Li⁺ ne Na⁺), ekisobozesa ekyuma okukuuma ebitundu ebisukka mu 90% ku capacitance yaakyo eyasooka ne bwe kiba nga kifukamidde. Ekisinga okweyoleka, empapula za graphite zisobola okukola nga substrate ewanirira ekikalu-state electrolyte membranes. Okukola emirimu egy’okungulu (nga okuyingiza ebibinja bya asidi wa sulfonic) kuyinza okutumbula okuteekebwa kwa lithium ion mu ngeri y’emu mu bbaatule z’ebyuma bya lithium, okuziyiza okukula kwa dendrite, era bwe kityo ne kitumbula obukuumi bwa bbaatule.
3. Okuwa amaanyi mu byuma bikalimagezi ne tekinologiya ow’okutegeera: ekintu eky’oku nsonda eky’ebyuma ebikyukakyuka .
Olw’okukulaakulana okw’amangu okw’ebyuma eby’amasannyalaze ebikyukakyuka (nga sensa eziyambala n’ebikwata ku ssirini ebisobola okuzinga), ebintu eby’ennono ebikaluba (nga firimu z’ebyuma ne indium tin oxide (ITO)) tebisobola kutuukiriza bisaanyizo bino olw’okukutuka kwabyo n’obutakyukakyuka. Graphite Paper’s dual properties of flexibility and conductivity kigifuula eky’okuddako ekituufu: esobola okugumira okukoona okusukka mu 10⁵ (nga erina curvature radius etasukka mm 1) awatali kufiirwa conductivity, era esobola okukolebwa mu ngeri yonna okuyita mu kukola ebyuma ebyangu (nga okusala n’okukuba ebikonde). Okugeza, mu sensa z’okusika ezigonvu, empapula za graphite ziteekebwamu ebiwujjo ebiwanvuwa, nga zikozesa okutegeera kwazo ku nkyukakyuka mu buziyiza bw’amasannyalaze n’okunyigirizibwa (nga zirina omugerageranyo gw’obuwulize (GF) ogwa 5–10), ekisobozesa okulondoola okw’amaanyi-okulowooza okw’obumativu okw’okukyukakyuka kw’eddakiika (nga okukuba kw’omuntu n’okutambula kw’ebinywa). Mu kisaawe ky’olususu lw’ebyuma, empapula za graphite-okusinziira ku sensa zisobola okukola obulungi ku bbugumu erigazi erya diguli -20 okutuuka ku 150℃, nga ziwa obuyambi obukulu obw’ekikugu obw’okuddamu okukwata mu roboti ezikola ebiramu.
4. Omugaso oguyinza okubaawo mu sayansi w’obutonde n’okuwangaala .
Amakulu ga ssaayansi ag’olupapula lwa graphite nago gatuuka ku kukuuma obutonde bw’ensi. Ebintu byayo ebisookerwako, graphite, kintu kya kaboni omungi ekisangibwa mu kibumba ky’ensi (ebifo eby’obutonde eby’obutonde eby’ensi yonna bisukka ttani obukadde 300). Ekirala, enkola y’okufulumya esobozesa okuddamu okukola amasannyalaze ga kasasiro (nga ago agava mu kukola ebyuma), okutuuka ku kuddamu okukozesa eby’obugagga, nga gakwatagana n’emisingi gya kemiko eya kiragala. Ekirala, ensengekera ya graphite paper’s porous structure (obuziba bwayo busobola okutereezebwa okuyita mu controlled oxidation-reduction process) kigisobozesa okwolesa omutindo gw’okusikiriza omulungi ennyo eri obucaafu nga amasannyalaze ag’ebyuma ebizito ne langi ez’obutonde. Okugezesa kulaga nti amino-Olupapula lwa graphite olukola lusobola okutuuka ku busobozi bw’okusikiriza 280 mg/g ku PB2⁺, okusukka ennyo ku kaboni akola (nga 100 mg/g). Mu bbanga eggwanvu, nga kaboni akiikirira-ebintu ebikola ebyesigamiziddwa, olupapula lwa graphite luwa omusingi gw'ebintu omupya ogwa "kaboni- okutuuka ku-kaboni" tekinologiya (nga okuyungibwa kwa kaboni dayokisayidi n'okukyusa) nga kigendereddwamu okutuuka ku butaliimu kaboni.
Amakulu ga ssaayansi ag’olupapula lwa graphite tegakoma mu kukola kwalwo kwokka okw’okumenyawo wabula ne mu kifo kyalyo nga "ekintu eky’omutala,” okuzimba omusingi okunoonyereza okusookerwako n’okukozesa yinginiya: okuva ku kulaga enkola z’okukuŋŋaanya ebintu bibiri-ebitundutundu bya kaboni ku mutendera omutono okutuuka ku kutumbula obuyiiya mu maanyi, ebyuma eby’amasannyalaze, ne tekinologiya w’obutonde ku macroscale. Nga tulongoosezza enkola z’okuteekateeka (nga okukula obutereevu kw’olupapula lwa graphite olunene-nga bakozesa enkola ya kemiko (CVD)) n’okukulaakulana okulala mu nteekateeka y’emirimu (nga okukyusakyusa ensengeka y’obusannyalazo nga tussaamu ekirungo kya atomu za nayitrojeni oba eza boron), empapula za graphite zisuubirwa okugenda mu maaso n’okugaziya ensalosalo zaakyo ez’okukozesa n’okufuuka ekimu ku bikulu eby’omusingi ebiwagira enkyukakyuka y’amakolero ey’okuna.
