Tlhahiso ea mantlha le litemoso tsa ho tjhaja betri ea lithium

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - អ្នកផ្គត់ផ្គង់ស្ថានីយ៍ថាមពលចល័ត

I. Meelelo ea ts&39;ebetso ea ts&39;ebetso ea lisebelisoa le tlhaloso ea sebaka se ikhethileng (m2 / g): e bua ka sebaka se kaholimo sa likaroloana tsa boima ba yuniti. (Mokhoa oa teko: ho bala argon volume adsorbed by the material of the unit weight).

Boholo ba likaroloana (μm): Tlhaloso ea likaroloana tsa thepa, e bua ka bophara ba likaroloana tsa thepa. D50 e hlalosa bophara ba karoloana e tloaelehileng ea thepa. Boima ba lefeela (G / CM3): Thepa e sisinya boima ba boima ba yuniti ea vibrate ea mochini.

Ho phaella moo, ho boetse ho na le thepa ka boeona, mofuta oa ponahalo, matla a ho ntša metsi, bokhoni ba bokhoni, lintho tse sa hloekang, le tse ling tse joalo le tsona ke lithibelo tsa ts&39;ebetso ea lisebelisoa tse fapaneng. Ea bobeli, lisebelisoa tse sa tšoaneng ka eleketrode le litšobotsi tsa eona tsa motheo tsa tšebeliso 1, conductive moemeli carbon enke mahlahana conductive, sa phutholoha k&39;habone, thepa e ntle conductive, matla adsorption, sebaka se seholo itseng holim&39;a metsi, hoo e ka bang 60-100 m2 / g, Eona ka boeona ha e na bokhoni. Maiketsetso graphite conductive moemeli, conductivity ke ka tlaase ho moo futsanehile ho feta k&39;habone enke, empa e itseng holim&39;a sebaka e nyenyane, 10-30 mAh / g, e leng bokgoni, ka 290 mAh / g, e leng molemo.

Hape ho na le graphite ea tlhaho, ho itšetlehile ka conductivity ea eona, e ka boela ea sebelisoa e le moemeli oa conductive, empa hape e le lisebelisoa tse mpe tsa electrode ka lebaka la matla a phahameng. Le nano-scale carbon fiber, conductivity e ntle, ts&39;ebetso e ntle ea ts&39;ebetso, empa theko e theko e boima. 2, lisebelisoa tsa elektrode hangata ke betri ea bobeli ea lithium ion, le lithium cobaltate, matla a eona a gram 135-150 mAh / g, compact density ke 3.

65-4.00 g / cc, LiCoO2 ke betri ea lithium ion e nang le electrode e ntle e nang le bophahamo ba motlakase oa potoloho e bulehileng. E phahame ho feta matla (theoretical ho feta matla 1068Wh / kg, bokhoni ba theory 274mAh / g), bophelo ba nako e telele ea potoloho, ho tsoa ka potlako, empa theko e theko e boima.

Lintho tse mpe tsa li-electrode: graphite ea maiketsetso, karolo e bohareng ea carbon microsphere, phetoho ea tlhaho ea graphite, joalo-joalo. Tloaelehileng graphite maiketsetso: gram bokgoni 290-310mAh / g, compaction 1.45-1.

55g / hoo. Intermediate phase carbon microspheres: gram bokgoni 310-320mAh / g, compaction 1.55-1.

65g / hoo. Phetoho ea tlhaho ea graphite: matla a gram 320-340mAh / g, compact 1.55-1.

65g / hoo. 3, sekhomaretsi se tsebahala haholo ka PVDF, lebitso la lik&39;hemik&39;hale ke polyvinylidene fluoride, &39;me boholo ba viscosity ea eona bo angoa ke boima ba limolek&39;hule, boemo ba sehlopha se sebetsang le ts&39;ebetso ea ts&39;ebetso. Ka kakaretso, mabapi le ts&39;ebetso e ts&39;oanang ea ts&39;ebetso, boemo bo ts&39;oanang ba sehlopha se sebetsang, boima bo boholo ba molek&39;hule, bo phahamisa viscosity ea eona, empa ka ho eketseha ha viscosity, ho lula ha eona ha slurry ho bonahala haholoanyane.

CMC le SBR ke sekhomaretsi se sebelisoang tsamaisong ea metsi. CMC (carboxymethylcellulose): phofo e tšoeu kapa e nyenyane e mosehla, ka boeona e na le thepa ea ho kopanya, empa tsamaisong ea metsi, tšebeliso ea eona ea motheo ka ho fetisisa kapa ea ho qhalakanngoa le SBR. SBR (butadous-blene-blewell milk): lebanta le lesoeu le khanyang emulsion mokelikeli o moputsoa, ​​motsoako oa polymer, o kopantsoeng le CMC, &39;me ts&39;ebetso ea eona ea ho kopanya e molemo.

Ntlha ea boraro, betri e etsa ts&39;ebetso e ntle ho finyella maemo a &39;maloa bakeng sa lisebelisoa, ho etsa hore e sebetse hantle, e se ke ea finyella maemo a latelang: 1, thepa ka boeona sebopeho, boholo ba boholo ba likaroloana, granules Boreleli ba ponahalo; ho ntšoa ha junifomo ea limolek&39;hule tse sebetsang ka har&39;a electrode; 3, molek&39;hule e sebetsang le moemeli ea conductive hantle; 4, tsamaisa marang-rang hantle; 5, le tekanyo e ntle ea ho kenella ka electrolyte; 6, bakeng sa e mong le e Molemo tshebetso maemo a bakeng sa thepa thepa. Ea bone, mokhoa o susumetsang le tatellano ea 1, hlohlelletsa sekhomaretsi PVDF: Ho ea ka mohopolo o lokelang ho lokisoa, palo ea phofo e omileng ea PVDF e boleloa, e kenngoe ka ontong e omileng, e baka metsotso e 60-120 ka likhato tse 70-80, ebe e bitsoa NMP Ka har&39;a setshelo sa sekhomaretsi, setshelo se tsitsitsoe, &39;me PVDF e eketsoa ka phofo e omileng, ho fihlela phofshoana e omeletseng e ntse e eketsoa ho PDF. e phaella ka ho re, setshelo se tiisitsoe ka hohle kamoo ho ka khonehang, se hlohlelletsa 3-4h, ho fihlela se qhibiliha ka ho feletseng, butle-butle tsosa Tiiso ka nako e itseng ho tlosa li-bubble ka rabara kapa ho tšela tharollo ea bona ka har&39;a setshelo se tsitsitseng. Rabara ena e ntle, mahloriso a eona hangata ke 12%.

CMC: Mohato oa mokhoa o ts&39;oana, empa mokhoa oa tharollo o thehiloe metsing, solvent ke metsi a hloekisitsoeng ho e-na le NMP, &39;me motsoako oa tharollo hangata ke 2-3.5%. 2, lintho tse bonahalang calcouting ho nka lintho tse bonahalang ka setofo vacuum bakeng sa 4 h ho 160 likhato vacuum ontong, &39;me joale hlohlelletsa,&39; me joale hlohlelletsa, mehato kakaretso ke tse latelang: 2.

1 Eketsa sesebelisoa sa conductive SP, &39;me u se kolobise ka NMP e lekaneng,&39; me U hlohlelletse 10-20min. 2.2 Eketsa li-conductive agents tse ling mohato oa pele, hlohlelletsa 10-20 min.

2.3 Ho eketsa lihlahisoa tse sebetsang le marenene, a hlohlelletsang ka khaba, ebe o e tsosa ka ho tsosoa ka lebelo le phahameng ho fihlela e nkoa e le e boreleli haholoanyane &39;me e retelehela ho agitator bakeng sa 2 h,&39; me slurry e hlokeha ho lebelo le leholo Thick e tsosang, finyella sepheo sa ho hasana). 2.

4 E fetole hore e be thata, butle-butle tsosa metsotso e 30 ho tlosa mouoane. 2.5 Tlosa slurry, sefa.

3, thepa e tsositsoeng 3.1 Eketsa moemeli oa conductive SP, e kolobise ka tekanyo e nyenyane ea NMP, e tsosoa ka 10-20min. 3.

2 Ho eketsa mahlahana a mang a conductive, lihlahisoa tse sebetsang, le CMC le palo e loketseng ea H2O, e tsosoa ka khaba, ebe e tsosoa ka lebelo le phahameng ka ho sisinyeha ho fihlela ho bonoa hore slurry holim&39;a metsi ho feta boreleli, &39;me joale e tsitsitseng ho hlohlelletsa ho hlohlelletsa sesebelisoa 1.2-1.5H (mohato ona o hloka hore ho be le lebelo le phahameng le leholo ho finyella sepheo sa ho qhalakanngoa).

3.3 Ho kenyelletsa palo e loketseng ea H2O mohatong oa bobeli. 3.

4 Ho eketsa SBR e lekaneng mohato o ka holimo, ho hlohlelletsa ho qhibiliha ka ho feletseng ho SBR, hoo e ka bang 30 min. (E hloka mocheso o tlase le lebelo le liehang ha o eketsa SBR) 3.5 Eketsa metsi a slurry 10-15% NMP (e nang le NMP hammoho le mohato oa 1), butle-butle tsosa bubble, metsotso e 30.

3.6 Tlosa slurry, sefa. V.

Mathata a tloaelehileng tekong, rarolla bothata le ho ama 1, morero, nako le mocheso oa ho baka. Lisebelisoa tsa elektrode: ho tlosa mongobo, oli le lerōle, maemo a ho baka ka kakaretso 160 degrees 4h. Sekhomaretsi: Deflash ea bohlokoa, maemo a ho baka ka kakaretso 70-80 degrees bake 60-120min.

Oxic acid: ho phaella ho mongobo le metsi a kristale, maemo a ho baka ka kakaretso 70-80 likhato bakeng sa 30-60 min. 2, molao-motheo oa tšebeliso ea li-conductive agents. Ka kakaretso li-conductors li tsoakoa, ho sebelisoa mokhoa oa ho ntša.

3. Phello ea conductive e kentsoeng betring. Li-conductors li na le matla a fokolang, potoloho, sethala, thepa ea ho ntša mocheso o phahameng le o tlaase le ho tsoa hona joale, ts&39;ebetso ea ts&39;ireletso, ho hanyetsa ka hare, joalo-joalo.

4, phapang ka tatellano ea tlatsetso ea metsoako le melemo le bofokoli. Conductant le sekhomaretsi li eketsa tatelano, oxalic acid e eketsa tatelano, NMP e eketsa tatelano linthong tse nang le metsi, jj. 5, sekhomaretsi hammoho le tšusumetso e fokolang ts&39;ebetsong ea betri.

6. Ke phello efe ea ho pholisa ka potlako nakong ea metsoako. 7.

Mokhoa oa ho tsamaisa le ho eketsoa le palo ea oxalic acid ka har&39;a tlhophiso e mpe ea mafura le oxalic acid. Ho na le merero e &39;meli ea ho futhumatsa ha gaseous: tlosa bokaholimo ba oxide ea foil ea koporo ebe u theha groove e senyang holim&39;a foil ea koporo, le ho fafatsa slurry holim&39;a foil ea koporo. Tšebeliso ea eona hangata ke 2% ea PVDF.

8, CMC, Tšebeliso ea SBR le Litlhokomelo ka Metsing. Ka bobeli CMC le SBR li na le sekhomaretsi, se sebelisoang ho slurry, moo CMC e leng bohlokoa ka nako ena, &39;me SBR e bohlokoa ho tlamahaneng. 9.

Mokhoa oa ho eketsa NMP le ho sebelisa ha kabo ea metsi e le mpe. Ho eketsa NMP ka electrode e mpe ea metsi ho bohlokoa ho eketsa tsitsipano ea holim&39;a foil e mpe, ho etsa hore tafole ea slurry e be boreleli haholoanyane, le ho thibela ho tlama ha makhasi. Leha ho le joalo, ha ho fepa, ho lokela ho hlokomeloa hore SBR le NMP ke lintho tse phahameng tsa limolek&39;hule, mocheso o potlakileng kapa o phahameng o ka itšoara ka lisebelisoa tse peli, &39;me o na le sebōpeho sa jelly&39; me o tsamaisana le likhase.

10, kamano pakeng tsa mefuta e tiileng, ea viscosity le ea gel. 11. Mocheso oa onto o joang ha o hula.

Litholoana li tlase haholo ho theola phofo ea tatellano e tlase, mocheso o phahame haholo, phofo ea polar e phofshoana, kapa ho phatloha ho hoholo, &39;me ho na le ho phahama. 12, boima ba li-puls tse qalileng ha bo lekane kapa bo boholo. The slurry surface density ha e arotsoe ka mokhoa o ts&39;oanang ka likarolo tse &39;maloa: sekhahla se ka pele le se ka morao sa letlapa la polar ha se lumellane, mahlakore a mabeli a mahlakoreng a mahlakoreng a mabeli ha a lumellane, ho kopanya ha polar ho etsa hore nako ea daemane e se ke ea tsitsana ka tsela e sa tsitsang, thepa ka boeona ha e tsitsa, sekhahla sa mulch holim&39;a metsi ha se tsitsitse kapa se senyenyane - &39;me ho na le sefahleho se senyenyane.

13, ho lokisa khatello ea rolara. Ka litsela tse peli, e &39;ngoe e tsoa ho microstructure ea likaroloana, ea bobeli e tsoa ho ponahalo ea electrode (gum, phofo, wrinkles). 14, nakong ea tlhahiso le ka mor&39;a tlhahiso ea filimi ka mor&39;a tlhahiso.

Sepheo sa ho baka poleiti ke ho tlosa mongobo, empa mocheso le nako li laoloa, &39;me mocheso oa ho baka oa polar ke likhato tse 130 nakong ea tlhahiso,&39; me mocheso o halikiloeng oa filimi ke likhato tse 90. 15, maemo a polokelo ea palo. Ka mor&39;a hore filimi e phethoe, palo e bolokiloe sebakeng se omileng se tiisang.