Kugadzirwa kwekutanga uye matanho ekuchaja lithium bhatiri

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - 휴대용 전원소 공급업체

I. Material systemization performance zvirevo uye tsananguro yakananga nzvimbo yepasi (m2 / g): inoreva nzvimbo yepasi yezvinhu unit mass particles. (Nzira yekuyedza: kuverenga iyo argon vhoriyamu yakashambadzirwa nezvinhu zvehuremu hweyuniti).

Particle size (μm): Tsanangudzo yezvimedu zvezvinhu, zvinoreva dhayamita yezvimedu zvezvinhu. D50 inotsanangura avhareji yechidimbu dhayamita yezvinhu. Vain Density (G / CM3): Izvo zvinhu zviri kudedera huremu hwehuwandu hweyuniti yemechani vibration.

Pamusoro pezvo, kune zvakare chinhu pachacho, rudzi rwechitarisiko, simba rekuburitsa, kugona kugona, kusvibiswa kwemukati, uye zvimwewo ndizvo zvinokanganisa kuita kwezvinhu zvakasiyana. Chechipiri, zvinhu zvakasiyana-siyana mu electrode uye maitiro ayo ekutanga ekushandisa 1, conductive mumiririri kabhoni inki conductive vamiririri, kusagadzikana kabhoni, yakanaka conductive zvivakwa, yakasimba adsorption, yakakura chaiyo nzvimbo, inenge 60-100 m2 / g, Iyo pachayo haina kugona. Artificial graphite conductive agent, iyo conductivity ishoma murombo pane kabhoni inki, asi iyo chaiyo nzvimbo idiki, 10-30 mAh / g, inova inokwana, inenge 290 mAh / g, izvo zviri nani.

Iko kunewo magirafu echisikigo, zvichienderana nekugadzirisa kwayo, inogonawo kushandiswa sechinhu chinofambisa, asiwo sechinhu chisina kunaka che electrode nekuda kwehuwandu hwepamusoro. Uye nano-scale kabhoni fiber, yakanaka conductivity, yakanaka kugadzirisa kuita, asi mutengo unodhura. 2, iyo electrode zvinhu inowanzova lithium ion yechipiri bhatiri, uye lithium cobaltate, yayo yega giramu inokwana 135-150 mAh / g, iyo compact density i3.

65-4.00 g / cc, LiCoO2 iri lithium ion bhatiri ine yakanaka electrode ine yakavhurika redunhu voltage kureba. Yakakwira kupfuura simba (theoretical kupfuura simba 1068Wh / kg, theoretical kugona 274mAh / g), hupenyu hurefu hwekutenderera, kukurumidza kubuda, asi mutengo unodhura.

Negative electrode zvinhu: artificial graphite, yepakati chikamu kabhoni microsphere, yakasikwa graphite shanduko, nezvimwe. Yakajairika yekugadzira graphite: giramu inokwana 290-310mAh / g, compaction 1.45-1.

55g / cc. Pakati pepakati kabhoni microspheres: giramu inokwana 310-320mAh / g, compaction 1.55-1.

65g / cc. Natural graphite kuchinjwa: giramu simba 320-340mAh / g, compact 1.55-1.

65g / cc. 3, glue inowanzozivikanwa nePVDF, zita remakemikari inonzi polyvinylidene fluoride, uye saizi yeviscosity yayo inokanganiswa nehuremu hwemamorekuru, chinzvimbo cheboka rinoshanda uye maitiro ekugadzirisa. Kazhinji, maererano nemaitiro akafanana ekugadzirisa, nzvimbo imwechete yeboka rinoshanda, hukuru hwema molecular huremu, iyo yakakwirira viscosity yayo, asi nekuwedzera kwe viscosity, kugadzirisa kwayo kwe slurry kunonyanya kutaurwa.

CMC uye SBR glue rinoshandiswa mune aqueous system. CMC (carboxymethylcellulose): chena kana micro-yellow powder, pachayo ine bonding properties, asi mumvura ine aqueous system, iyo inonyanya kushandiswa kana kuparadzira zvinhu uye SBR. SBR (butadous-blene-blewell mukaka): bhandi jena mwenje webhuruu emulsion fluid, polymer compound, yakasanganiswa neCMC, uye kushanda kwayo kwekubatana kuri nani.

Chechitatu, bhatiri rinoita basa rakanaka rekusangana nemamiriro akati wandei ezvigadzirwa, kuti riite basa rakanaka, risingasviki kune zvinotevera mamiriro: 1, iyo pachayo chimiro, saizi yehukuru hwechikamu, granules Smoothness yechitarisiko; yunifomu inobuda yemamorekuru anoshanda mu electrode; 3, iyo inoshanda molecule uye conductive mumiririri yakanaka kuonana; 4, fambisa network zvakanaka; 5, uye electrolyte yakanaka infiltration dhigirii; 6, kune yega yega Yakanaka maitiro mamiriro ezvinhu zvinhu. Chechina, inosimudzira nzira uye kutevedzana 1, simbisa glue PVDF: Zvinoenderana neiyo yekumisikidzwa kugadziridzwa, huwandu hwePVDF hupfu hwakaoma hunorehwa, isa muchoto chakaoma, bika 60-120 min pa70-80 madhigirii, uye wozonzi NMP Mumudziyo wekunamatira, mudziyo unogadziriswa, uye iyo PDFV yakanyungudika poda yakaomeswa yobva yawedzerwa kupfumbu yakaoma. yakawedzera, chigadziko chakavharwa sezvinobvira, chinobvongodzwa 3-4h, kusvikira chanyungudutswa zvachose, zvishoma nezvishoma simbisa Chisimbiso kwenguva yakati kuti ubvise mabhubhu murubha kana kudira mhinduro yavo mumudziyo wakagadziriswa. Iri rabha rinonakidza, kutarisisa kwayo kunowanzo 12%.

CMC: Iyo nzira nhanho yakangofanana, asi iyo mhinduro sisitimu ndeyemvura-yakavakirwa, iyo inonyungudutsa iine deionized mvura pane NMP, uye kusangana kwemhinduro kunowanzo 2-3.5%. 2, zvinhu zvekuverengera kuendesa zvinhu muovheni yekuvhaira kwe4h pa160 degree vacuum oven, wozobvongodza, wozobvongodza, nhanho dzese ndedzinotevera: 2.

1 Wedzera conductive agent SP, wonyorovesa nehuwandu hwakakwana hweNMP, uye Kurudzira 10-20min. 2.2 Wedzera mamwe maconductive agents kune yekutanga nhanho, simbisa iyo 10-20 min.

2.3 Kuwedzera kushingaira zvigadzirwa uye chingamu, kubvongodza nechipunu, wozoikurudzira pamusoro stirrer pamhanyiro yepamusoro kusvikira yaonekwa kuti yakanyatsopfava uye yakatendeukira kune agitator ye2 h, uye slurry inodiwa kuti iite high speed Gobvu kurunga, kuzadzisa chinangwa kupararira). 2.

4 Gadzirisa kuti zviome, zvishoma nezvishoma fambisa maminitsi makumi matatu kubvisa utsi. 2.5 Bvisa slurry, sefa.

3, yakavhenganiswa zvinhu 3.1 Wedzera conductive agent SP, inyorovese nehuwandu hushoma hweNMP, yakakonzerwa ne10-20min. 3.

2 Kuwedzera mamwe conductive vamiririri, vanoshingaira zvigadzirwa, uye CMC uye akakodzera uwandu H2O, akamutswa nechipunu, uye ipapo kunyandurwa pakumhanya pamusoro stirrer kusvikira zvaonekwa kuti slurry pemvura iri kunyanya kutsvedzerera, uye ipapo akagadzika kunyandura Kukurunga pamusoro mudziyo 1.2-1.5H (danho iri rinoda kukurumidza kukurumidza thickening kuti chinangwa chokuparadzira).

3.3 Kuwedzera huwandu hwakakodzera hweH2O padanho rechipiri. 3.

4 Kuwedzera SBR yakakwana mudanho repamusoro, kubvongodza kunonyungudika zvachose muSBR, anenge makumi matatu min. (Inoda yakaderera tembiricha uye inononoka kumhanya paunowedzera SBR) 3.5 Wedzera slurry mvura zviri mukati 10-15% NMP (ine NMP pamwe mudanho 1), zvishoma nezvishoma kurunga bubble, 30 maminetsi.

3.6 Bvisa slurry, sefa. V.

Matambudziko akajairika mukuyedza, kugadzirisa dambudziko uye kukanganisa 1, chinangwa, nguva uye tembiricha yekubheka. Electrode zvinhu: kubvisa unyoro, mafuta uye guruva, kubika mamiriro anowanzo 160 madhigirii 4h. Glue: Yakakosha deflash, kubheka mamiriro anowanzo 70-80 madhigirii anobika 60-120min.

Oxic acid: kuwedzera kune hunyoro uye mvura yekristaro, mamiriro ekubikira anowanzo 70-80 madhigirii e30-60 min. 2, musimboti wekushandisa conductive agents. Makondakita anowanzo kusanganiswa, achishandisa nzira yekubvisa.

3. Mhedzisiro ye conductive agent yakawedzerwa kubhatiri. Makondakita ane mashoma anokanganisa simba, kutenderera, chikuva, yakakwirira uye yakaderera tembiricha yekuburitsa zvivakwa uye yakakwira ikozvino kubuda, kuchengetedza kuita, kuramba kwemukati, nezvimwe.

4, mutsauko mukurongeka kwekuwedzera kwezvinhu uye zvakanakira nekuipira. Conductant uye inonamira inowedzera kutevedzana, oxalic acid inowedzera kutevedzana, NMP inowedzera kutevedzana mune aqueous zvinhu, nezvimwe. 5, glue pamwe nekushomeka kwekuita kwebhatiri.

6. Chii chinokonzera kukurumidza kutonhora panguva yezvigadzirwa. 7.

Maitiro ekufamba uye kuwedzera uye huwandu hweoxalic acid mune ine mafuta isina kunaka kumisikidzwa uye oxalic acid. Pane zvinangwa zviviri zvekupisa gasi: bvisa iyo yepamusoro oxide layer yemhangura foil uye gadzira groove inoparadza pamusoro peiyo foil yemhangura, uye kusaswa kwe slurry pafoil yemhangura. Kushandiswa kwayo kunowanzo 2% yePVDF.

8, CMC, SBR Kushandisa uye Kungwarira muMvura. Ose ari maviri CMC uye SBR ane adhesive, anoshandiswa mu slurry, uko CMC yakakosha panguva ino, uye SBR yakakosha pakubatana. 9.

Maitiro ekuwedzera NMP uye kushandisa kana kugoverwa kwemvura kwakashata. Kuwedzera NMP mune aqueous negative electrode kwakakosha kuti uwedzere tension yepasi peiyo yakaipa foil, zvichiita kuti tafura yeslurry iwedzere kutsvedzerera, uye kudzivirira kusungwa kwepurupu. Nekudaro, kana uchidyisa, kutarisisa kunofanira kucherechedzwa kuti SBR neNMP yakakwira molecular organics, kukurumidza kana kupisa kwakanyanya kunogona kuita muzvinhu zviviri, uye jelly-shaped uye inoperekedzwa nemagasi.

10, hukama pakati pezvakasimba, viscosity uye gel marudzi. 11. Iri sei tembiricha yehovhoni kana uchidhonza.

Iyo pulp yakadzikira zvakanyanya kudzikisa pasi-yakatevedzana hupfu, tembiricha yakanyanya, polar poda ipfu, kana kutsemuka kwakakosha, uye kune kukwira. 12, kuwanda kwemapuls kwakatangwa hakuna kuenzana kana yakakura. Iyo slurry surface density haina kufanana yakakamurwa kuita zvinhu zvakasiyana-siyana: kumberi uye kumashure kwedensity ye polar sheet haina kuenderana, iyo miviri yemativi density yepasi haina kuenderana, iyo polar kusanganiswa kunokonzerwa nekusaenzana kukonzeresa kuti nguva yedhaimondi ienderane, iyo pachayo haina kugadzikana, iyo mulch surface density haina kugadzikana kana diki- Uye kune zvakare densid.

13, kugadzirisa roller pressure. Nenzira mbiri, imwe inobva kune microstructure yezvikamu, yechipiri inobva pakuonekwa kwe electrode (gum, upfu, wrinkles). 14, panguva yekugadzira uye mushure mekugadzirwa kwefirimu mushure mekugadzirwa.

Chinangwa chekubikira danda ndechekubvisa unyoro, asi tembiricha uye nguva zvinodzorwa, uye tembiricha yekubikira polar ndeye 130 madhigirii panguva yekugadzira, uye kupisa kwakabikwa kwefirimu kuri 90 degrees. 15, mamiriro ekuchengetedza edanda. Mushure mokunge firimu yapedzwa, danda rinochengetwa munzvimbo yakavhara yakaoma.