Obuwunga bwa Graphite obw’enkulungo

1. Omusingi gw’ebintu

Spherical Graphite Powder ekolebwa mu high-purity natural flake graphite nga substrate, ekolebwa okuyita mu nkola nnya core precision enkola "coarse crushing and purification → airflow pulverization and spheroidization → high-temperature graphitization → plasma surface modification", era ku nkomerero ekoleddwa mu micrometer sized spherical powder. Enkizo yaayo enkulu eri mu kuwa amaanyi emirundi ebiri "ebintu eby'omunda ebya graphite + eby'enzimba eby'enkulungo": esigaza obuziyiza obutono, obutambuzi obw'ebbugumu obw'amaanyi, obuziyiza asidi ne alkali engeri za graphite, era erongoosa okutambula kwa pawuda (okuwummulamu enkoona Entono oba okwenkana diguli 30 ) n'obuzito bwa taapu okuyita mu spheroidization, okugonjoola ensonga z’obulumi ez’okukuŋŋaanyizibwa okwangu n’okubumba okuzibu okwa butto wa graphite owa bulijjo. Kiba kintu kya musingi ekikola ekiteetaagisa mu bintu bya bbaatule za lithium ez’amaanyi amapya, ebyuma eby’omutindo ogwa waggulu-, n’okukola mu ngeri entuufu, naddala mu busannyalazo obubi obwa bbaatule za lithium-ion, ekiyinza okulongoosa butereevu density y’amasoboza ga bbaatule (okutuuka ku 300Wh/kg oba okusingawo) n’okutebenkera kw’enzirukanya.

2. Ebifaananyi by’ebintu

Enkulungo ya waggulu nnyo: Obutoffaali buno buba bwa mutindo gwa nkulungo oba nga bwa nneekulungirivu mu nkula, nga bulina nkulungo ya Greater than oba equal to 92% (industry standard>=88%). Okukyama okwetooloola kw’obutundutundu obutunuuliddwa mu scanning electron microscopy (SEM) kuli Wansi oba okwenkana 5%, ekiyinza okukendeeza ku buziyiza bw’okusikagana wakati w’obutundutundu, okukendeeza ku kwambala kw’ebyuma ebikola, n’okulongoosa obumu bw’okutabula ebintu, nga omuwendo gw’okufiirwa kw’ebintu guli Wansi oba gwenkana 1%.

Ensaasaanya y’obunene bw’obutundutundu eyesigamiziddwa ku mbeera: Enkula y’obutundutundu esobola okulongoosebwa okusinziira ku mbeera y’okukozesa. D50 etera okukozesebwa mu kifo kya bbaatule ya lithium eri abakozesa eri 3-8μm, D50 etera okukozesebwa mu kifo kya bbaatule ya lithium ey’amaanyi eri 8-12μm, ate D50 etera okukozesebwa mu kifo kya bbaatule ya lithium etereka amaanyi eri 12-18μm. Ebiragiro byonna birina D10/D90 span eya Less than oba equal to 10μm okwewala okukyama mu buwanvu bw’obusannyalazo obuva ku sayizi y’obutundutundu obutali bwenkanya.

Obutambuzi obulungi n’obutambuzi bw’ebbugumu: Oluvannyuma lw’okulongoosa graphitization ey’ebbugumu eringi- (ebbugumu erisinga oba eryenkana 2800℃), ekirungo kya kaboni ekinywevu kisinga oba kyenkana 99.95% (graphite eya bulijjo Esinga oba yenkana 99.5%), obuziyiza bwa voliyumu buba Butono oba bwenkana 8μΩ·m, era obutambuzi bw’ebbugumu businga oba bwenkana 160W/(m·K) nga bwe kiri. Bw’ogeraageranya ne graphite eya bulijjo eyeekulungirivu, obulungi bw’obutambuzi bwongerwako ebitundu 15%-20%, ekiyinza okukendeeza ku kukuŋŋaanyizibwa kw’ebbugumu mu kiseera ky’okucaajinga n’okufulumya bbaatule.

Okufuga obucaafu obutono ennyo: Nga twettanira enkola ya "hydrochloric acid - hydrofluoric acid mixed pickling + high-temperature impurity removal", evvu eririmu liri Wansi oba yenkana 0.08%, n'obucaafu obw'obulabe obukulu (Fe<=30ppm, Si<=25ppm, S<=15ppm) ziri wansi nnyo w’omutindo gw’amakolero (buli emu<=50ppm), okwewala ion z’obucaafu okuyingizibwa mu positive electrode ya battery n’okuleeta okuvunda kw’obusobozi.

Okukyukakyuka okw’amaanyi mu butonde bw’ensi: Okutebenkera okulungi ennyo mu mbeera za asidi ne alkaline eza pH 2-12 (okuggyako asidi wa nayitiriki ne asidi wa salufaali omungi), obuziyiza bw’ebbugumu bugaziyiziddwa okutuuka ku diguli -250 okutuuka ku diguli 3200 wansi w’empewo etali ya maanyi, okweyongera kw’obunnyogovu Okutono oba okwenkana 0.1% oluvannyuma lw’ennaku 30 mu mbeera ey’obunnyogovu (obunnyogovu obutuufu Obutono oba obwenkana 85%), era nga tewali bunnyogovu ekintu eky’okunyiga oba eky’okugatta (agglomeration phenomenon).

Okukwatagana okw’okubumba okw’amaanyi: Densite ya taapu esinga oba yenkana 1.3g/cm3 (graphite eya bulijjo eyenkana 1.1g/cm3), era erina okukwatagana okulungi n’ebisiba ebikulu nga PVDF (polyvinylidene fluoride) ne CMC (carboxymethyl cellulose). Densite y’ekipande ky’obusannyalazo ekikoleddwa esobola okutuuka ku 1.6-1.8g/cm3, okutuukiriza ebyetaago by’okubumba obusannyalazo bwa bbaatule obw’obusobozi obw’amaanyi.

 

 

 

3. Enkozesa y’Ebintu 

Ekintu eky’obusannyalazo obubi (negative electrode material) ku bbaatule za lithium-ion:

Battery za lithium ez’amaanyi: Zikwatagana ne bbaatule za lithium ez’amaanyi (NCM) ne bbaatule za lithium iron phosphate (LFP), ezikozesebwa ku mmotoka empya ez’amaanyi (nga bbaatule z’amaanyi) ne loole ezikola emirimu egy’amasannyalaze egy’amaanyi-. Battery esobola okukuuma capacity retention rate ya Greater than oba eyenkana 80% oluvannyuma lwa cycles 1500, era amaanyi gasobola okutuuka ku 80% mu ddakiika 30 nga ecaajinga amangu.

Battery za lithium ezikozesebwa: Ekozesebwa ku ssimu ez’amaanyi ne laptop okwongera ku bunene bwa bbaatule obunene bw’amasoboza (>=700Wh/L) n’okwongera ku bulamu bwa bbaatule bw’okozesa omulundi gumu.

Battery za lithium ezitereka amaanyi: Zikozesebwa mu masundiro g’amasannyalaze agatereka amaanyi mu maka n’enkola z’okutereka amaanyi mu base station, nga zirina omuwendo gw’okukuuma obusobozi bw’okufulumya amazzi ogusinga oba ogwenkana 75% mu mbeera z’ebbugumu entono eza -20℃.

Paste etambuza amazzi ku mutindo gwa waggulu: Tegeka ekikuta ky’ebyuma ng’ogatta butto wa ffeeza ne butto w’ekikomo, ekikozesebwa mu layeri etambuza ebyuma ebiyitibwa flexible circuit boards (FPC) n’okusiiga okutambuza antenna za 5G base station. Obuzito bw’ekikuta busobola okutebenkera ku 5000-8000cP, era omuwendo gw’okuyita mu kukuba gusinga oba gwenkana 98%.

Ebintu ebisiiga mu ngeri entuufu: Nga ekizigo ekigumu ekigattibwa ku woyiro asiiga yingini y’ennyonyi ne giriisi esiiga ekibumbe eky’ebbugumu eringi-, omugerageranyo gw’okusikagana guli wansi nga 0.12, era gukyayinza okukuuma omulimu gw’okusiiga wansi w’embeera z’ebbugumu erya waggulu erya diguli 300 , nga kyongera ku bulamu bw’obuweereza bw’ebitundu emirundi 2-3.

Ebintu ebikolebwa mu bikozesebwa (functional composite materials).:

Thermal conductive composite material: Etabulwa mu aluminiyamu alloy for LED heat sink, okwongera ku thermal conductivity ya aluminium alloy ne 30%, okugonjoola ekizibu ky’ebbugumu eringi okukendeeza ku LED beads.

Anti static material: Composite ne PP (polypropylene) okukola electronic component packaging film, nga stable surface resistance ya 106-108Ω, okutuukiriza ESD okukuuma ebyetaago.

Okukozesa mu nnimiro okw’enjawulo: Oluvannyuma lw’okukyusa n’ebirungo ebiyunga silane, esobola okukozesebwa ng’ekizigo ku fuel cell bipolar plates okutumbula okuziyiza kwazo okukulukuta; Era esobola okukozesebwa ng’ekirungo ekiyamba okutambuza ekikuta kya ffeeza mu butoffaali obukola ekitangaala, okukendeeza ku bungi bw’ekikuta kya ffeeza (ebitundu 10%-15%) n’okukendeeza ku ssente za modulo ezikola ekitangaala.

4. Ebipimo by’Ebyekikugu

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