Isifinyezo senqubo yokuxuba ye-electrode slurry enhle nembi yebhethri le-lithium ion

Okokuqala, isimiso sokuxuba
Ngokuxubha ama-blade kanye nohlaka olujikelezayo ukuze lujikelezisane, ukumiswa komshini kuyakhiqizwa futhi kugcinwe, futhi ukudluliselwa kwesisindo phakathi kwezigaba zoketshezi neziqinile kuyathuthukiswa. Ukunyakaza koketshezi oluqinile kuvame ukuhlukaniswa ngalezi zingxenye ezilandelayo: (1) ukumiswa kwezinhlayiya eziqinile; (2) ukumiswa kabusha kwezinhlayiya ezizinzile; (3) ukungena kwezinhlayiya ezimisiwe zibe uketshezi; (4) ukusetshenziswa phakathi kwezinhlayiya naphakathi kwezinhlayiya nama-paddle Amandla abangela ukuthi ama-agglomerate ezinhlayiya ahlakazeke noma alawule usayizi wezinhlayiya; (5) ukudluliselwa kwesisindo phakathi koketshezi neziqinile.

Okwesibili, umphumela oshukumisayo

Inqubo yokuhlanganisa empeleni ihlanganisa izingxenye ezahlukene ku-slurry ndawonye ngesilinganiso esijwayelekile ukulungiselela i-slurry ukuze kube lula ukumboza okufanayo nokuqinisekisa ukuhambisana kwezingcezu zezigxobo. Izithako ngokuvamile zakha izinqubo ezinhlanu, okungukuthi: ukwelapha ngaphambi kwesikhathi, ukuxuba, ukumanzisa, ukuhlakazeka kanye nokugoqa izinto zokusetshenziswa.

Okwesithathu, amapharamitha e-slurry

1, ukujiya:

Ukumelana koketshezi ekugelezeni kuchazwa njengenani lokucindezeleka kwe-shear elidingekayo ngendiza ngayinye engu-25 px 2 lapho uketshezi lugeleza ngesivinini esingu-25 px/s, esibizwa ngokuthi i-kinematic viscosity, ku-Pa.s.
Ukuqina komzimba kuyisici soketshezi. Lapho uketshezi lugeleza epayipini, kunezimo ezintathu zokugeleza kwe-laminar, ukugeleza kokuguquguquka, kanye nokugeleza okuguquguqukayo. Lezi zimo ezintathu zokugeleza komzimba nazo zikhona emishinini yokuxuba, futhi enye yemingcele eyinhloko enquma lezi zimo ukuqina koketshezi.
Ngesikhathi senqubo yokuxuba, ngokuvamile kubhekwa ukuthi i-viscosity ingaphansi kwama-5 Pa.s uketshezi olune-viscosity ephansi, njenge: amanzi, uwoyela we-castor, ushukela, ujamu, uju, uwoyela wokugcoba, i-emulsion ene-viscosity ephansi, njll.; Ama-5-50 Pas uketshezi olune-viscosity ephakathi Isibonelo: uyinki, umuthi wokuxubha amazinyo, njll.; Ama-50-500 Pas uketshezi olune-viscosity ephezulu, njenge-chewing gum, i-plastisol, uphethiloli oqinile, njll.; ama-Pa angaphezu kwama-500 uketshezi olune-viscosity ephezulu njenge: izingxube zerabha, ukuncibilika kwepulasitiki, i-organic Silicon njalo njalo.

2, usayizi wezinhlayiya D50:

Ububanzi bosayizi wezinhlayiya bungu-50% ngobuningi bezinhlayiya eziku-slurry

3, okuqukethwe okuqinile:

Iphesenti lezinto eziqinile ku-slurry, isilinganiso sethiyori sokuqukethwe okuqinile singaphansi kokuqukethwe okuqinile kokuthunyelwa

Okwesine, isilinganiso semiphumela exubile

Indlela yokuthola ukufana kokuxuba nokuxuba uhlelo lokumiswa oluqinile nolwelwesi:

1, ukulinganisa okuqondile

1) Indlela ye-Viscosity: ukusampula kusuka ezindaweni ezahlukene zesistimu, ukulinganisa i-viscosity ye-slurry nge-viscometer; uma ukuphambuka kuncane, kulapho ukuxuba kufana khona;

2) Indlela yezinhlayiya:

A, ukusampula kusuka ezindaweni ezahlukene zesistimu, kusetshenziswa isikrufu sosayizi wezinhlayiya ukuze kubonwe usayizi wezinhlayiya ze-slurry; lapho usayizi wezinhlayiya usondelene nosayizi wempuphu yezinto eziluhlaza, kulapho ukuxubana kufana khona;

B, ukusampula kusuka ezindaweni ezahlukene zesistimu, kusetshenziswa umhloli wosayizi wezinhlayiya we-laser diffraction ukuze kubonwe usayizi wezinhlayiya ze-slurry; lapho ukusatshalaliswa kosayizi wezinhlayiya kujwayelekile, lapho izinhlayiya ezinkulu zincane, kulapho ukuxubana kufana khona;

3) Indlela ethile yamandla adonsela phansi: ukusampula kusuka ezindaweni ezahlukene zesistimu, ukukala ubuningi be-slurry, lapho ukuphambuka kuncane, kulapho ukuxuba kufana khona.

2. Ukulinganisa okungaqondile

1) Indlela yokuqukethwe okuqinile (okuncane): Ukuthatha amasampula kusuka ezindaweni ezahlukene zesistimu, ngemva kokushisa okufanele nesikhathi sokubhaka, ukukala isisindo sengxenye eqinile, lapho ukuphambuka kuncane, kulapho ukuxuba kufana khona;

2) I-SEM/EPMA (encane): isampula evela ezindaweni ezahlukene zesistimu, ifake ku-substrate, yomise, bese ubheka izinhlayiya noma izakhi efilimini ngemva kokomisa i-slurry nge-SEM (i-electron microscope) / i-EPMA (i-electron probe) Ukusatshalaliswa; (izinto eziqinile zesistimu ngokuvamile ziyizinto zokuqhuba)

Inqubo yokuxubha i-anode emihlanu

Umnyama wekhabhoni oqhubayo: Usetshenziswa njenge-ejenti yokuqhubayo. Umsebenzi: Ukuxhuma izinhlayiya ezinkulu zezinto ezisebenzayo ukuze wenze ukuqhubela phambili kube kuhle.

I-Copolymer latex — SBR (irabha ye-styrene butadiene): isetshenziswa njenge-binder. Igama lamakhemikhali: I-Styrene-Butadiene copolymer latex (i-polystyrene butadiene latex), i-latex encibilikayo emanzini, okuqukethwe okuqinile okungu-48~50%, i-PH 4~7, iphuzu lokubanda -5~0 °C, iphuzu lokubila cishe elingu-100 °C, izinga lokushisa lokugcina elingu-5~35 ° C. I-SBR iyi-polymer dispersion ye-anionic enokuqina okuhle kokusebenza kanye nokusebenza kahle, futhi inamandla aphezulu okubopha.

I-Sodium carboxymethyl cellulose (CMC) – (i-carboxymethyl cellulose sodium): isetshenziswa njengesithambisi kanye nesiqinisi. Ukubukeka kwayo kuyimpuphu ye-floc fiber emhlophe noma ephuzi noma i-powder emhlophe, ayinaphunga, ayinambitheki, ayinabo ubuthi; incibilika emanzini abandayo noma emanzini ashisayo, yakha ijeli, isixazululo asithathi hlangothi noma sine-alkaline kancane, asincibiliki ku-ethanol, i-ether, i-solvent ephilayo efana ne-isopropyl alcohol noma i-acetone iyancibilika kusisombululo samanzi esingu-60% se-ethanol noma i-acetone. I-hygroscopic, izinzile ekukhanyeni nasekushiseni, i-viscosity iyancipha ngokushisa okwandayo, isixazululo sizinzile ku-pH 2 kuya ku-10, i-PH ingaphansi kuka-2, izinto eziqinile ziyavuvukala, kanti i-pH iphakeme kuno-10. Izinga lokushisa lokushintsha kombala lalingu-227 ° C, izinga lokushisa le-carbonization lalingu-252 ° C, kanti ukucindezelwa kobuso besisombululo samanzi esingu-2% kwakungu-71 nm/n.

Inqubo yokuxuba nokuhlanganisa i-anode imi kanje:

 
Okwesithupha, inqubo yokuxuba i-cathode

Umnyama wekhabhoni oqhubayo: Usetshenziswa njenge-ejenti yokuqhubayo. Umsebenzi: Ukuxhuma izinhlayiya ezinkulu zezinto ezisebenzayo ukuze wenze ukuqhubela phambili kube kuhle.

I-NMP (N-methylpyrrolidone): isetshenziswa njengesithako esixubayo. Igama lamakhemikhali: I-N-Methyl-2-polyrrolidone, ifomula yama-molecule: C5H9NO. I-N-methylpyrrolidone iwuketshezi olunuka kancane i-ammonia oluxutshwa namanzi nganoma iyiphi indlela futhi cishe luxutshwe ngokuphelele nazo zonke izithako (i-ethanol, i-acetaldehyde, i-ketone, i-aromatic hydrocarbon, njll.). Iphuzu lokubila elingu-204 ° C, iphuzu lokusha elingu-95 ° C. I-NMP iyisithako esithambile esinobuthi obuphansi, iphuzu lokubila eliphezulu, ukuncibilika okuhle kakhulu, ukukhetha kanye nokuqina. Isetshenziswa kabanzi ekukhishweni kwe-aromatics; ukuhlanzwa kwe-acetylene, ama-olefin, ama-diolefin. Isithako esisetshenziselwa i-polymer kanye ne-medium yokwenza i-polymerization okwamanje sisetshenziswa enkampanini yethu ye-NMP-002-02, ngobumsulwa obungu->99.8%, amandla adonsela phansi athile angu-1.025~1.040, kanye nokuqukethwe kwamanzi okungu-<0.005% (500ppm).

I-PVDF (i-polyvinylidene fluoride): isetshenziswa njengesithambisi kanye nesihlanganisi. I-polymer emhlophe ecwebezelayo enobumpuphu enobukhulu obuphakathi kuka-1.75 no-1.78. Inokumelana okuhle kakhulu kwe-UV kanye nokumelana nokushisa, futhi ifilimu yayo ayiqinile futhi ayiqhekeki ngemva kokubekwa ngaphandle iminyaka eyishumi noma amabili. Izakhiwo ze-dielectric ze-polyvinylidene fluoride ziqondile, i-dielectric constant iphakeme njengo-6-8 (MHz ~ 60Hz), kanti i-dielectric loss tangent nayo inkulu, cishe ngo-0.02 ~ 0.2, kanti ukumelana kwevolumu kuphansi kancane, okungu-2 × 1014ΩNaN. Izinga lokushisa layo lokusetshenziswa isikhathi eside lingu- -40 ° C ~ +150 ° C, kuleli banga lokushisa, i-polymer inezakhiwo ezinhle zomshini. Inezinga lokushisa lokushintsha kwengilazi elingu- -39 ° C, izinga lokushisa elincibilikayo elingu- -62 ° C noma ngaphansi, iphuzu lokuncibilika kwekristalu elingaba ngu-170 ° C, kanye nezinga lokushisa lokubola lokushisa elingu-316 ° C noma ngaphezulu.

Inqubo yokuxuba nokuhlanganisa i-cathode:

7. Izici zokuqina kwe-slurry

1. Ukugoba kwe-slurry viscosity ngesikhathi sokuxuba

Njengoba isikhathi sokuxuba sandiswa, i-viscosity ye-slurry ivame ukuba yinani elizinzile ngaphandle kokushintsha (kungashiwo ukuthi i-slurry ihlakazeke ngokulinganayo).

2. Ijika le-slurry viscosity ngokushisa

Uma izinga lokushisa liphakeme, kulapho i-viscosity ye-slurry iphansi khona, futhi i-viscosity ivame ukuba nenani elizinzile uma ifinyelela izinga lokushisa elithile.

3. Ijika lokuqukethwe okuqinile kwethangi lokudlulisa ngokuhamba kwesikhathi

Ngemva kokuba i-slurry ivuselelwe, ifakwa ngepayipi ethangini lokudlulisa ukuze kufakwe i-Coater coating. Ithangi lokudlulisa liyavuselelwa ukuze lijikeleze: 25Hz (740RPM), ukujikeleza: 35Hz (35RPM) ukuqinisekisa ukuthi imingcele ye-slurry izinzile futhi ngeke ishintshe, kufaka phakathi i-pulp. Izinga lokushisa lezinto ezibonakalayo, i-viscosity kanye nokuqukethwe okuqinile ukuqinisekisa ukufana kwe-slurry coating.

4, i-viscosity ye-slurry ene-curve yesikhathi